AIM： To evaluate the influence of preoperative biliary drainage on morbidity and mortality after surgical resection for ampullary carcinoma.METHODS： We analyzed retrospectively data for 82 patients who underwent pot...AIM： To evaluate the influence of preoperative biliary drainage on morbidity and mortality after surgical resection for ampullary carcinoma.METHODS： We analyzed retrospectively data for 82 patients who underwent potentially curative surgery for ampullary carcinoma between September 1993 and July 2007 at the Singapore General Hospital, a tertiary referral hospital. Diagnosis of ampullary carcinoma was confirmed histologically. Thirty-five patients underwent preoperative biliary drainage （PBD group）, and 47 were not drained （non-PBD group）. The mode of biliary drainage was endoscopic retrograde cholanoiopancreatography （n = 33） or percutaneous biliary drainage （n = 2）. The following parameters were analyzed： wound infection, intra-abdominal abscess, intra-abdominal or gastrointestinal bleeding, septicemia, biliary or pancreatic leakage, pancreatitis, gastroparesis, and re-operation rate. Mortality was assessed at 30 d （hospital mortality） and also longterm. The statistical endpoint of this study was patient survival after surgery.RESULTS： The groups were well matched for demographic criteria, clinical presentation and operative characteristics, except for lower hemoglobin in the non- PBD group （10.9 ± 1.6 vs 11.8 ± 1.6 in the PBD group）.Of the parameters assessing postoperative morbidity, incidence of wound infection was significantly less in the PBD than the non-PBD group [1 （2.9%） vs 12 （25.5%）]. However, the rest of the parameters did not differ significantly between the groups, i.e. sepsis [10 （28.6%） vs 14 （29.8%）], intra-abdominal bleeding [1 （2.9%） vs 5 （10.6%）], intra-abdominal abscess [1 （2.9%） vs 8 （17%）], gastrointestinal bleeding [3 （8.6%） vs 5 （10.6%）], pancreatic leakage [2 （5.7%） vs 3 （6.4%）], biliary leakage [2 （5.7%） vs 3 （6.4%）], pancreatitis [2 （5.7%） vs 2 （4.3%）], gastroparesis [6 （17.1%） vs 10 （21.3%）], need for blood transfusion [10 （28.6%） vs 17 （36.2%）] and re-operation rate [1 �展开更多
The Industrialized Building System （IBS） was recently introduced to minimize the time and cost of project construction. Accordingly, ensuring the integration of the connection of precast components in IBS structures...The Industrialized Building System （IBS） was recently introduced to minimize the time and cost of project construction. Accordingly, ensuring the integration of the connection of precast components in IBS structures is an important factor that ensures stability of buildings subjected to dynamic loads from earthquakes, vehicles, and machineries. However, structural engineers still lack knowledge on the proper connection and detailed joints o fiBS structure construction. Therefore, this study proposes a special precast concrete wall-to-wall connection system for dynamic loads that resists multidirectional imposed loads and reduces vibration effects （PI2014701723）. This system is designed to connect two adjacent precast wall panels by using two steel U-shaped channels （i.e., male and female joints）. During casting, each joint is adapted for incorporation into a respective wall panel after considering the following conditions： one side of the steel channel opens into the thickness face of the panel; a U-shaped rubber is implemented between the two channels to dissipate the vibration effect; and bolts and nuts are used to create an extension between the two U-shaped male and female steel channels. The developed finite element model of the precast wall is subjected to cyclic loads to evaluate the performance of the proposed connection during an imposed dynamic load. Connection performance is then compared with conventional connections based on the energy dissipation, stress, deformation, and concrete damage in the plastic range. The proposed precast connection is capable of exceeding the energy absorption of precast walls subjected to dynamic load, thereby improving its resistance behavior in all principal directions.展开更多
Partial discharges(PDs) due to artificial void in samples of LDPE nanocomposite sheet have been investigated in this work.PDs may cause the degradation of insulating materials and may affect the lifetime of high-volta...Partial discharges(PDs) due to artificial void in samples of LDPE nanocomposite sheet have been investigated in this work.PDs may cause the degradation of insulating materials and may affect the lifetime of high-voltage apparatus. An experimental work using sphere ball-plane electrode system(CIGRE MethodⅡ) and a 1.0 mm LDPE composite sheet was carried out.Different weight percentages of nanosilica(0%,2%,4%,6%and 8%) were used. PD experimental results,such as PD magnitude and PD number(both PD pulse polarities),as functions of the applied stress duration at a specified applied voltage were compared.The surface morphology of specimens was also presented and this conforms to the PD findings.The experimental results show that the PD characteristics of the LDPE generally improve with the introduction of nanosilica,the composite with the highest content of filler,namely the 8%(wt) nanosilica sample has the least partial discharge activities.展开更多
Human metabolite moisture detection is important in health monitoring and non-invasive diagnosis.However,ultra-sensitive quantitative extraction of respiration information in real-time remains a great challenge.Herein...Human metabolite moisture detection is important in health monitoring and non-invasive diagnosis.However,ultra-sensitive quantitative extraction of respiration information in real-time remains a great challenge.Herein,chemiresistors based on imine-linked covalent organic framework(COF)films with dual-active sites are fabricated to address this issue,which demonstrates an amplified humidity-sensing signal performance.By regulation of monomers and functional groups,these COF films can be pre-engineered to achieve high response,wide detection range,fast response,and recovery time.Under the condition of relative humidity ranging from 13 to 98%,the COFTAPB-DHTA film-based humidity sensor exhibits outstanding humidity sensing perfor-mance with an expanded response value of 390 times.Furthermore,the response values of the COF film-based sensor are highly linear to the relative humidity in the range below 60%,reflecting a quantitative sensing mechanism at the molecular level.Based on the dual-site adsorption of the(-C=N-)and(C-N)stretching vibrations,the revers-ible tautomerism induced by hydrogen bonding with water molecules is demonstrated to be the main intrinsic mechanism for this effective humidity detection.In addition,the synthesized COF films can be further exploited to effectively detect human nasal and oral breathing as well as fabric permeability,which will inspire novel designs for effective humidity-detection devices.展开更多
In this work, a fast(0.5 h), green microwave-assisted synthesis of single crystalline Sb_2Se_3 nanowires was developed. For the first time we demonstrated a facile solvent-mediated process, whereby intriguing nanostru...In this work, a fast(0.5 h), green microwave-assisted synthesis of single crystalline Sb_2Se_3 nanowires was developed. For the first time we demonstrated a facile solvent-mediated process, whereby intriguing nanostructures including antimony selenide(Sb_2Se_3) nanowires and selenium(Se) microrods can be achieved by merely varying the volume ratio of ethylene glycol(EG) and H_2O free from expensive chemical and additional surfactant. The achieved uniform Sb_2Se_3 nanowire is single crystalline along [001]growth direction with a diameter of 100 nm and a length up to tens of micrometers. When evaluated as an anode of lithium-ion battery, Sb_2Se_3 nanowire can deliver a high reversible capacity of 650.2 m Ah g^(-1) at 100 mA g^(-1) and a capacity retention of 63.8% after long-term 1000 cycles at 1000 mA g^(-1), as well as superior rate capability(389.5 m Ah g^(-1) at 2000 mA g^(-1)). This easy solvent-mediated microwave synthesis approach exhibits its great universe and importance towards the fabrication of high-performance metal chalcogenide electrode materials for future low-cost, large-scale energy storage systems.展开更多
Canopy shaking system is one of the research hotspots for large-scale mechanized fruits harvesting.Shaking rods considered as one of the essential components of canopy shaker are responsible for transferring mechanica...Canopy shaking system is one of the research hotspots for large-scale mechanized fruits harvesting.Shaking rods considered as one of the essential components of canopy shaker are responsible for transferring mechanical energy from shaking mechanism to different regions of tree canopy.This transfer depends on the characteristics of the shaking rods that directly strike the tree canopy.In order to evaluate the effects of the shaking rods on tree damage level and fruit removal percentage,three kinds of shaking rods with different materials or shapes were selected.Based on the results of bending deformation tests,it was proven that the rigid shaking rod(R_(1))with the material of Polyvinyl Chloride(PVC)did more resistance against producing bending deformation in comparison with the other two types of shaking rods with the material of Polyamide Nylon 12(PA).By contrast,the position close to the free end of the flexible shaking rod was easier to be deformed by less external force.In addition,dynamic analysis and vibration performance tests indicated that the rigid shaking rod could produce stronger vibration with higher shaking frequency of 4.8 Hz and maximum acceleration of 31.4 m/s^(2).Finally,the results of field trials indicated that the flexible bow-shaped shaking rod(R_(3))has a better widespread performance to achieve comparative higher fruit removal percentage up to 82.6%while producing lower tree damage rate of 5.36%.This study demonstrates that the materials or shapes of the shaking rod could significantly influence the fruit detachment rate and tree damage level.This study would provide an essential reference for the application of shaking rods for canopy shaker.展开更多
Online Social Networks(OSNs)are based on the sharing of different types of information and on various interactions(comments,reactions,and sharing).One of these important actions is the emotional reaction to the conten...Online Social Networks(OSNs)are based on the sharing of different types of information and on various interactions(comments,reactions,and sharing).One of these important actions is the emotional reaction to the content.The diversity of reaction types available on Facebook(namely FB)enables users to express their feelings,and its traceability creates and enriches the users’emotional identity in the virtual world.This paper is based on the analysis of 119875012 FB reactions(Like,Love,Haha,Wow,Sad,Angry,Thankful,and Pride)made at multiple levels(publications,comments,and sub-comments)to study and classify the users’emotional behavior,visualize the distribution of different types of reactions,and analyze the gender impact on emotion generation.All of these can be achieved by addressing these research questions:who reacts the most?Which emotion is the most expressed?展开更多
A 24 year-old Malay lady presented with high grade fever,myalgia,generalized rashes,severe headache and was positive for dengue serology test.Her lowest platelet count was 45×10~9 cells/L.She complained of sudden...A 24 year-old Malay lady presented with high grade fever,myalgia,generalized rashes,severe headache and was positive for dengue serology test.Her lowest platelet count was 45×10~9 cells/L.She complained of sudden onset of painlessness,profound loss of vision bilaterally 7 days after the onset of fever.On examination,her right eye best corrected vision was 6/30 and left eye was6/120.Her anterior segment examination was unremarkable.Funduscopy revealed there were multiple retinal haemorrhages found at posterior pole of both fundi and elevation at fovea area with subretinal fluid.Systemic examination revealed normal findings except for residual petechial rashes.She was managed conservatively.Her vision improved tremendously after 2 months.The retinal hemorrhages and foveal elevation showed sign of resolving.Ocular manifestations following dengue fever is rare.However,bilateral visual loss can occur if both fovea arc involved.展开更多
By means of density functional theory computations, we predicted two novel two-dimensional （2D） nanolnaterials, namely P2X （X=C, Si） monolayers with pentagonal configurations. Their structures, stabilities, intrin...By means of density functional theory computations, we predicted two novel two-dimensional （2D） nanolnaterials, namely P2X （X=C, Si） monolayers with pentagonal configurations. Their structures, stabilities, intrinsic electronic, and optical properties as well as the effect of external strain to the elec- tronic properties have been systematically examined. Our computations showed that these P2C and P2Si monolayers have rather high thermodynamic, kinetic, and thermal stabilities, and are indirect semiconductors with wide bandgaps （2.76 eV and 2.69 eV, respectively） which can be tuned by an external strain. These monolayers exhibit high absorptions in the UV region, but behave as almost transparent layers for visible light in the electromagnetic spectrum. Their high stabilities and excep- tional electronic and optical properties suggest them as promising candidates for future applications in UV-light shielding and antireflection layers in solar cells.展开更多
Recent decades have seen a substantial increase in interest in research on natural fibres that is aligned with sustainable development goals(SDGs).Due to their renewable resources and biodegradability,natural fiberrei...Recent decades have seen a substantial increase in interest in research on natural fibres that is aligned with sustainable development goals(SDGs).Due to their renewable resources and biodegradability,natural fiberreinforced composites have been investigated as a sustainable alternative to synthetic materials to reduce the usage of hazardous waste and environmental pollution.Among the natural fibre,jute fibre obtained from a bast plant has an increasing trend in the application,especially as a reinforcement material.Numerous research works have been performed on jute fibre with regard to reinforced thermoset and thermoplastic composites.Nevertheless,current demands on sustainable materials have required new developments in thermoplastic composites.In this paper,the author reviews jute plants as reinforcement materials for thermoplastic matrix polymers.This review provides an overview of the sustainability of jute plants as reinforcement material for thermoplastic matrix polymers.The overview on jute based thermoplastic composites focused on the thermal behavior and mechanical properties.Apart from physical,chemical,and mechanical properties,the study also covers the current and perspectives for future research challenges faced by the researchers on jute fibre reinforced thermoplastic composites.展开更多
Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique,followed by a grafting with fluoroalkylsilane(FAS).The ...Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique,followed by a grafting with fluoroalkylsilane(FAS).The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes(gas permeation,mechanical strength,pore size,porosity,tortuosity,morphology,and contact angle)by the addition of alumina(Al2O3)to the pure kaolin with mono or multiparticle sizes.By varying the overall loading and particle size of alumina addition,different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange.The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140°after grafting.Kaolin-alumina-4,one of the hollow fibres fabricated in this work,achieved a mean pore size of 0.25μm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10^(-5) mol·m^(-2)·Pa^(-1)·s^(-1),which makes the hollow fibre most suitable for the membrane contactor application.展开更多
Background: Surgery is the treatment for early-stage cervical cancer. Radiochemotherapy is used in the treatment of locally advanced stages. But the choice of treatment can be difficult. Objective: The objective of th...Background: Surgery is the treatment for early-stage cervical cancer. Radiochemotherapy is used in the treatment of locally advanced stages. But the choice of treatment can be difficult. Objective: The objective of this work was to evaluate the therapeutic aspects of cervical cancer in the early stages IA to IIA in the oncology department of A Ledantec Hospital in Dakar. Patients and methods: This was a descriptive retrospective study, from January 2015 to December 2020, in the oncology department of A Ledantec Hospital, including all the patients who had been treated for early-stage invasive cervical cancer. Results: We included 28 patients. The average age was 49.54 years old. There were 11 patients (39.3%) with a stage ≤ IB1. Surgery was the first in 14 patients (50%). The initial approach was a midline supra and subumbilical laparotomy. The surgery was R0 in 65.22%. Postoperative complications were found in 4 patients including 1 case of operative wound suppuration, 1 case of dysuria, 1 case of postoperative eventration and 1 case of rectovaginal fistula. Concomitant Radiochemotherapy was neoadjuvant in 7 cases (25%), adjuvant in 14 cases (50%). The chemotherapy was neoadjuvant in 09 cases (56.25%) and adjuvant in 7 cases (43.75%) with minor toxicities. We had recorded 2 deaths. Conclusion: The treatment of the early stages of invasive cervical cancer is based on surgery. Neoadjuvant treatments may be useful in particular situations.展开更多
Anterior segment dysgenesis is a group of non-acquired ocular anomalies whose cause is multifactorial;many genes are involved. It is characterized by developmental anomalies of the tissues of the anterior segment, of ...Anterior segment dysgenesis is a group of non-acquired ocular anomalies whose cause is multifactorial;many genes are involved. It is characterized by developmental anomalies of the tissues of the anterior segment, of which Peters-Plus syndrome is included. Our aim is to describe the different ophthalmological and systemic aspects of Peters-Plus syndrome in order to improve the quality of diagnosis of this syndrome even in the absence of genetic confirmation, especially in low-income countries or when genetic studies are not available. In this observation, we report the case of a newborn with Peters-Plus syndrome admitted to the neonatology unit. The diagnosis was made on the basis of clinical-radiological criteria, and treatment consisted of caring for the baby and the parents, given the particular psychological context often associated with the birth of a baby with polymalformative syndrome. From this study, Peters-Plus syndrome should be borne in mind in a fetus with typical ocular anomalies, unusual facial appearance and long tubular bone insufficiency, especially in the presence of a positive family history. In such cases, prenatal diagnosis could be an option for the couples. A genetic study should be undertaken to confirm the clinical diagnosis and provide appropriate genetic counseling and prenatal diagnostic options.展开更多
Introduction: Bell’s palsy is an uncommon adverse effect of the COVID-19 vaccine that has been reported in clinical trials. Even though a few studies have linked the vaccination to Bell’s palsy, the actual mechanism...Introduction: Bell’s palsy is an uncommon adverse effect of the COVID-19 vaccine that has been reported in clinical trials. Even though a few studies have linked the vaccination to Bell’s palsy, the actual mechanism is uncertain. Objectives: To describe the demographic data and COVID-19 vaccines-related data with Bell’s palsy in a tertiary centre of Malaysia, Hospital Kuala Lumpur. Methods: A retrospective cross-sectional study was observed among vaccinated recipients who developed Bell’s palsy within 60 days and sought treatment in the Otorhinolaryngology Department Hospital Kuala Lumpur, Malaysia between 1<sup>st</sup> May 2021 and 30<sup>th</sup> November 2021. The demographic data, clinical history, and vaccination history were collected from clinical records. The facial paralysis was graded according to the House-Brackmann grading system. Results: A total of 26 patients with a mean age was 38.5 years;higher incidence in younger age, below 60 years old (n = 24), specifically 18 - 30 years old (n = 11). We observed an equal number in relation to gender and onset (after the first or second dose) of facial palsy. Predominantly were Malay (n = 21) and only 6 patients had comorbidities. We found there was no difference in regard to the type of vaccine among Bell’s palsy patients;Pfizer (n = 9), followed by Sinovac (n = 9) and AstraZeneca (n = 8). Conclusion: Bell’s palsy was found to be a possible adverse event of the COVID-19 vaccine. Younger groups were noted as susceptible to this rare adverse effect. However, the benefits of vaccination outweigh the risk of Bell’s palsy, which has a good prognosis. More research with larger samples is needed to determine the true relationship between vaccination and Bell’s palsy.展开更多
Haze episodes have become a major concern in Malaysia over the past few decades and have an increasingly important impact on the country each and every year. During haze episodes from biomass burning in Southeast Asia...Haze episodes have become a major concern in Malaysia over the past few decades and have an increasingly important impact on the country each and every year. During haze episodes from biomass burning in Southeast Asia, particularly from Sumatra, Indonesia, particulate matter PM2.5 is found to be one of the dangerous sources of airborne pollution and is known to seriously affect human health. This study determines the composition of carbohydrates （as levoglucosan）, surfactants, major elements, and anions in PM2.5 during a 2013 haze episode. PM2.5 samples were collected from Universiti Kebangsaan Malaysia, Bangi, using a high volume sampler during a seven-day monitoring campaign during the peak of that year＇s haze episode. PM2.5 concentrations ranged between 14.52 and 160.93 μg/m3, exceeding the 2005 WHO air quality guidelines for PM2.5 （25 μg/m3 for 24-h mean）. The patterns for levoglucosan, surfactants, major elements, and anionic compositions were proportional to the PM2.5 concentrations. Changes in PM2.5 observed on days 3 and 4 were influenced by a combination of meteorological factors, which substantiate the theory that such factors play a pivotal role in haze episodes.展开更多
A 27 year-old lady,presented with sudden loss of vision in the right eve tor a week.It was followed In poor vision in the left eye alter 3 days.It involved the whole entire visual field and was associated with pain on...A 27 year-old lady,presented with sudden loss of vision in the right eve tor a week.It was followed In poor vision in the left eye alter 3 days.It involved the whole entire visual field and was associated with pain on eye movement.She was diagnosed to have miliary tuberculosis and retroviral disease 4 months ago.She was started on anti-TB since then but defaulted highly active anti-retroviral therapy(HAART).On examination.her visual acuity was no perception of light in the right eye and 6/120(pinhole 3/60) in the lelt eye.Anterior segment in both eyes was unremarkable.Funduscopy showed bilateral optic disc swelling with presence ot multiple foci of choroiditis in the peripheral retina.The vitreous and relinal vessels were normal.Chest radiography was normal.CT scan of orbit and brain revealed bilateral enhancement of the optic nerve sheath that suggest the diagnosis of bilateral atypical optic neuritis.This patient was managed with infectious disease team.She was started on HAART and anti-TB treatment was continued.She completed anti-TB treatment alter 9 months without any serious side effects.During follow up the visual acuity in both eyes was not improved.However.funduscopy showed resolving ol disc swelling and choroiditis following treatment.展开更多
The intercostobrachial nerve (ICBN) is responsible for the sensory</span></span></span></span></span><span><span><span><span><span><span style="font-...The intercostobrachial nerve (ICBN) is responsible for the sensory</span></span></span></span></span><span><span><span><span><span><span style="font-family:""><span style="font-family:Verdana;"> innervation of a part of the inner side of the arm. Injury of the intercostobrachial nerve is </span><span style="font-family:Verdana;">a complication of axillary dissection during lymph node dissection.</span> <b><span style="font-family:Verdana;">Objective</span></b><span style="font-family:Verdana;">: </span><span style="font-family:Verdana;">This study aimed to determine the effect of preservation of the</span><span style="font-family:Verdana;"> intercostobra</span><span><span style="font-family:Verdana;">chial nerve on postoperative sensory disturbances. </span><b><span style="font-family:Verdana;">Methods:</span></b><span style="font-family:Verdana;"> This is a</span></span><span style="font-family:Verdana;"> prospective, single-center study which was carried out in 90 patients followed in the oncology department of the Aristide Le Dantec hospital in Dakar, suffering </span><span style="font-family:Verdana;">from breast cancer and having undergone breast surgery associated with</span><span style="font-family:Verdana;"> axillary </span><span style="font-family:Verdana;">dissection, for a period of 6 months. The patients were divided into two</span><span style="font-family:Verdana;"> groups depending on whether the intercostobrachial nerve (ICBN) was preserved or </span><span style="font-family:Verdana;">not. The two groups were compared in terms of the incidence of sensory</span><span style="font-family:Verdana;"> disturbances. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Sixty patients without nerve preservation and 30 patients with nerve preservation were included in the study, </span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;">, 90 patients in total. </span><span style="font-family:Verdana;">ICBN was injured in 60 pa展开更多
<strong>Introduction:</strong><span><span><span style="font-family:""><span style="font-family:Verdana;"> Cystic breast cancer is a rare entity. Breast cyst...<strong>Introduction:</strong><span><span><span style="font-family:""><span style="font-family:Verdana;"> Cystic breast cancer is a rare entity. Breast cysts are most often benign. The clinical characteristics of malignancy are not specific. </span><b><span style="font-family:Verdana;">Objective:</span></b> <span style="font-family:Verdana;">To report a series of malignant cystic tumors of the breast and to describe</span><span style="font-family:Verdana;"> their different characteristics. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was an observational study carried out between January 2018 and October 2021 at the Dakar </span><span style="font-family:Verdana;">university surgical oncology unit. We studied the clinical appearance, im</span><span style="font-family:Verdana;">ag</span><span style="font-family:Verdana;">ing, </span><span style="font-family:Verdana;">histopathology, extent of disease and treatment. We did not include cases of</span><span style="font-family:Verdana;"> pure, single, or multiple chronically progressive cysts. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> There were 8 </span><span style="font-family:Verdana;">patients, 6 women and 2 men. The average age was 44. All patients presented </span><span style="font-family:Verdana;">with a palpable unilateral deforming skin mass without inflammatory </span><span style="font-family:Verdana;">character. One patient presented with a bloody discharge. The cyst was</span><span style="font-family:Verdana;"> multilocular with</span><span style="font-family:Verdana;">out intracystic growth in 2 cases and presented a growth signal in 6 cases.</span> <span style="font-family:Verdana;">Imaging was ACR 3 in 5 cases and ACR 4 in 3 cases. Histopathology found 6</span><span style="font-family:Verdana;"> in</span><span style="font-family:Verdana;">va</span><span style="font-family:Verdana;">sive carcinomas including 2 papillary, 3 In展开更多
Geophysical study and watershed hydrological delineation have been integrated at downstream of Alasra dam site Norh Azraq area to investigate their potential for artificial groundwater recharge. The total surface area...Geophysical study and watershed hydrological delineation have been integrated at downstream of Alasra dam site Norh Azraq area to investigate their potential for artificial groundwater recharge. The total surface area of the watershed was found to be about 195 square kilometers. The estimated annual runoff volumes for the Alasra watershed ranged between 1.2 and 1.8 MCM. Moreover, the interpretation of Ten Time Domain Electromagnetic (TDEM) soundings suggested three principal subsurface layers. The top surface layer has an intermediate resistivity (90 - 110 Ohm·m) with a thickness ranging from a few meters to around 50 m. This layer was interpreted as superficial deposits. The second subsurface layer with variably high resistivity values is composed of unsaturated massive basalt layer and probably belongs to Madhala Olivine Phyric Basalt Formation (MOB). The large variations in resistivity could be ascribed to the degree of water saturation (as a result of groundwater recharge from the nearby harvested water dam), or lithological variations (clay content) and/or due to structural control. The third subsurface layer has low resistivity values (·m to 40 Ω·m) and was found at a depth ranging from 120 to 150 m. This layer could represent a saturated basalt layer with high clay contents. The subsurface structures and major faults have been identified. Based on the results of this study, a combination of surface and subsurface artificial groundwater recharge techniques is highly recommended.展开更多
文摘AIM： To evaluate the influence of preoperative biliary drainage on morbidity and mortality after surgical resection for ampullary carcinoma.METHODS： We analyzed retrospectively data for 82 patients who underwent potentially curative surgery for ampullary carcinoma between September 1993 and July 2007 at the Singapore General Hospital, a tertiary referral hospital. Diagnosis of ampullary carcinoma was confirmed histologically. Thirty-five patients underwent preoperative biliary drainage （PBD group）, and 47 were not drained （non-PBD group）. The mode of biliary drainage was endoscopic retrograde cholanoiopancreatography （n = 33） or percutaneous biliary drainage （n = 2）. The following parameters were analyzed： wound infection, intra-abdominal abscess, intra-abdominal or gastrointestinal bleeding, septicemia, biliary or pancreatic leakage, pancreatitis, gastroparesis, and re-operation rate. Mortality was assessed at 30 d （hospital mortality） and also longterm. The statistical endpoint of this study was patient survival after surgery.RESULTS： The groups were well matched for demographic criteria, clinical presentation and operative characteristics, except for lower hemoglobin in the non- PBD group （10.9 ± 1.6 vs 11.8 ± 1.6 in the PBD group）.Of the parameters assessing postoperative morbidity, incidence of wound infection was significantly less in the PBD than the non-PBD group [1 （2.9%） vs 12 （25.5%）]. However, the rest of the parameters did not differ significantly between the groups, i.e. sepsis [10 （28.6%） vs 14 （29.8%）], intra-abdominal bleeding [1 （2.9%） vs 5 （10.6%）], intra-abdominal abscess [1 （2.9%） vs 8 （17%）], gastrointestinal bleeding [3 （8.6%） vs 5 （10.6%）], pancreatic leakage [2 （5.7%） vs 3 （6.4%）], biliary leakage [2 （5.7%） vs 3 （6.4%）], pancreatitis [2 （5.7%） vs 2 （4.3%）], gastroparesis [6 （17.1%） vs 10 （21.3%）], need for blood transfusion [10 （28.6%） vs 17 （36.2%）] and re-operation rate [1 �
基金financial support from the Housing Research Center of UPMNAEIM Company
文摘The Industrialized Building System （IBS） was recently introduced to minimize the time and cost of project construction. Accordingly, ensuring the integration of the connection of precast components in IBS structures is an important factor that ensures stability of buildings subjected to dynamic loads from earthquakes, vehicles, and machineries. However, structural engineers still lack knowledge on the proper connection and detailed joints o fiBS structure construction. Therefore, this study proposes a special precast concrete wall-to-wall connection system for dynamic loads that resists multidirectional imposed loads and reduces vibration effects （PI2014701723）. This system is designed to connect two adjacent precast wall panels by using two steel U-shaped channels （i.e., male and female joints）. During casting, each joint is adapted for incorporation into a respective wall panel after considering the following conditions： one side of the steel channel opens into the thickness face of the panel; a U-shaped rubber is implemented between the two channels to dissipate the vibration effect; and bolts and nuts are used to create an extension between the two U-shaped male and female steel channels. The developed finite element model of the precast wall is subjected to cyclic loads to evaluate the performance of the proposed connection during an imposed dynamic load. Connection performance is then compared with conventional connections based on the energy dissipation, stress, deformation, and concrete damage in the plastic range. The proposed precast connection is capable of exceeding the energy absorption of precast walls subjected to dynamic load, thereby improving its resistance behavior in all principal directions.
文摘Partial discharges(PDs) due to artificial void in samples of LDPE nanocomposite sheet have been investigated in this work.PDs may cause the degradation of insulating materials and may affect the lifetime of high-voltage apparatus. An experimental work using sphere ball-plane electrode system(CIGRE MethodⅡ) and a 1.0 mm LDPE composite sheet was carried out.Different weight percentages of nanosilica(0%,2%,4%,6%and 8%) were used. PD experimental results,such as PD magnitude and PD number(both PD pulse polarities),as functions of the applied stress duration at a specified applied voltage were compared.The surface morphology of specimens was also presented and this conforms to the PD findings.The experimental results show that the PD characteristics of the LDPE generally improve with the introduction of nanosilica,the composite with the highest content of filler,namely the 8%(wt) nanosilica sample has the least partial discharge activities.
基金supported by the National Key Research and Development Program of China(2022YFB3205500,and 2022YFC3104700)the National Natural Science Foundation of China(62101329 and 61971284)+4 种基金the Shanghai Sailing Program(21YF1421400)the Natural Science Foundation of Shanghai(23ZR1430100)the Oceanic Interdisciplinary Program of Shanghai Jiao Tong University(SL2020ZD203,SL2021MS006 and SL2020MS031)Scientific Research Fund of Second Institute of Oceanography,Ministry of Natural Resources of P.R.China(SL2003)Startup Fund for Youngman Research at Shanghai Jiao Tong University.
文摘Human metabolite moisture detection is important in health monitoring and non-invasive diagnosis.However,ultra-sensitive quantitative extraction of respiration information in real-time remains a great challenge.Herein,chemiresistors based on imine-linked covalent organic framework(COF)films with dual-active sites are fabricated to address this issue,which demonstrates an amplified humidity-sensing signal performance.By regulation of monomers and functional groups,these COF films can be pre-engineered to achieve high response,wide detection range,fast response,and recovery time.Under the condition of relative humidity ranging from 13 to 98%,the COFTAPB-DHTA film-based humidity sensor exhibits outstanding humidity sensing perfor-mance with an expanded response value of 390 times.Furthermore,the response values of the COF film-based sensor are highly linear to the relative humidity in the range below 60%,reflecting a quantitative sensing mechanism at the molecular level.Based on the dual-site adsorption of the(-C=N-)and(C-N)stretching vibrations,the revers-ible tautomerism induced by hydrogen bonding with water molecules is demonstrated to be the main intrinsic mechanism for this effective humidity detection.In addition,the synthesized COF films can be further exploited to effectively detect human nasal and oral breathing as well as fabric permeability,which will inspire novel designs for effective humidity-detection devices.
基金supported by the National Key Research and Development Program of China(2016YFA0202603)the National Basic Research Program of China(2013CB934103)+5 种基金the National Natural Science Foundation of China(51521001,51602239)the National Natural Science Fund for Distinguished Young Scholars(51425204)Yellow Crane Talent(Science&Technology)Program of Wuhan Citythe Fundamental Research Funds for the Central Universities(WUT:2016III001,2016III003,2016IVA090)the Programme of Introducing Talents of Discipline to Universities(B17034)support from the Lorraine Region(nowpart of Grand Est Region)Cooperation Research Lorraine/Hubei Program 2015/2017
文摘In this work, a fast(0.5 h), green microwave-assisted synthesis of single crystalline Sb_2Se_3 nanowires was developed. For the first time we demonstrated a facile solvent-mediated process, whereby intriguing nanostructures including antimony selenide(Sb_2Se_3) nanowires and selenium(Se) microrods can be achieved by merely varying the volume ratio of ethylene glycol(EG) and H_2O free from expensive chemical and additional surfactant. The achieved uniform Sb_2Se_3 nanowire is single crystalline along [001]growth direction with a diameter of 100 nm and a length up to tens of micrometers. When evaluated as an anode of lithium-ion battery, Sb_2Se_3 nanowire can deliver a high reversible capacity of 650.2 m Ah g^(-1) at 100 mA g^(-1) and a capacity retention of 63.8% after long-term 1000 cycles at 1000 mA g^(-1), as well as superior rate capability(389.5 m Ah g^(-1) at 2000 mA g^(-1)). This easy solvent-mediated microwave synthesis approach exhibits its great universe and importance towards the fabrication of high-performance metal chalcogenide electrode materials for future low-cost, large-scale energy storage systems.
基金the funding from the National Key R&D Program of China“the 13th Five-Year Plan”(Program No.2016YFD0700503)Major Program of Cooperative Innovation for Yangling Demonstration Zone(Program No.2016CXY-20)the Shaanxi Provincial Agricultural Technology Program of Innovation and Development(Program No.2016NY-127).We also wish to thank the China Scholarship Council for providing the financial support to the first author for conducting his collaborative doctoral research in the CREC at the University of Florida.The authors are grateful to the National Institute of Food and Agriculture(Project No.FLA-LAL-005354)for providing the funding for this research.Also,we thank the critical comments and suggestions from the anonymous reviewers for improving the manuscript.
文摘Canopy shaking system is one of the research hotspots for large-scale mechanized fruits harvesting.Shaking rods considered as one of the essential components of canopy shaker are responsible for transferring mechanical energy from shaking mechanism to different regions of tree canopy.This transfer depends on the characteristics of the shaking rods that directly strike the tree canopy.In order to evaluate the effects of the shaking rods on tree damage level and fruit removal percentage,three kinds of shaking rods with different materials or shapes were selected.Based on the results of bending deformation tests,it was proven that the rigid shaking rod(R_(1))with the material of Polyvinyl Chloride(PVC)did more resistance against producing bending deformation in comparison with the other two types of shaking rods with the material of Polyamide Nylon 12(PA).By contrast,the position close to the free end of the flexible shaking rod was easier to be deformed by less external force.In addition,dynamic analysis and vibration performance tests indicated that the rigid shaking rod could produce stronger vibration with higher shaking frequency of 4.8 Hz and maximum acceleration of 31.4 m/s^(2).Finally,the results of field trials indicated that the flexible bow-shaped shaking rod(R_(3))has a better widespread performance to achieve comparative higher fruit removal percentage up to 82.6%while producing lower tree damage rate of 5.36%.This study demonstrates that the materials or shapes of the shaking rod could significantly influence the fruit detachment rate and tree damage level.This study would provide an essential reference for the application of shaking rods for canopy shaker.
文摘Online Social Networks(OSNs)are based on the sharing of different types of information and on various interactions(comments,reactions,and sharing).One of these important actions is the emotional reaction to the content.The diversity of reaction types available on Facebook(namely FB)enables users to express their feelings,and its traceability creates and enriches the users’emotional identity in the virtual world.This paper is based on the analysis of 119875012 FB reactions(Like,Love,Haha,Wow,Sad,Angry,Thankful,and Pride)made at multiple levels(publications,comments,and sub-comments)to study and classify the users’emotional behavior,visualize the distribution of different types of reactions,and analyze the gender impact on emotion generation.All of these can be achieved by addressing these research questions:who reacts the most?Which emotion is the most expressed?
文摘A 24 year-old Malay lady presented with high grade fever,myalgia,generalized rashes,severe headache and was positive for dengue serology test.Her lowest platelet count was 45×10~9 cells/L.She complained of sudden onset of painlessness,profound loss of vision bilaterally 7 days after the onset of fever.On examination,her right eye best corrected vision was 6/30 and left eye was6/120.Her anterior segment examination was unremarkable.Funduscopy revealed there were multiple retinal haemorrhages found at posterior pole of both fundi and elevation at fovea area with subretinal fluid.Systemic examination revealed normal findings except for residual petechial rashes.She was managed conservatively.Her vision improved tremendously after 2 months.The retinal hemorrhages and foveal elevation showed sign of resolving.Ocular manifestations following dengue fever is rare.However,bilateral visual loss can occur if both fovea arc involved.
文摘By means of density functional theory computations, we predicted two novel two-dimensional （2D） nanolnaterials, namely P2X （X=C, Si） monolayers with pentagonal configurations. Their structures, stabilities, intrinsic electronic, and optical properties as well as the effect of external strain to the elec- tronic properties have been systematically examined. Our computations showed that these P2C and P2Si monolayers have rather high thermodynamic, kinetic, and thermal stabilities, and are indirect semiconductors with wide bandgaps （2.76 eV and 2.69 eV, respectively） which can be tuned by an external strain. These monolayers exhibit high absorptions in the UV region, but behave as almost transparent layers for visible light in the electromagnetic spectrum. Their high stabilities and excep- tional electronic and optical properties suggest them as promising candidates for future applications in UV-light shielding and antireflection layers in solar cells.
文摘Recent decades have seen a substantial increase in interest in research on natural fibres that is aligned with sustainable development goals(SDGs).Due to their renewable resources and biodegradability,natural fiberreinforced composites have been investigated as a sustainable alternative to synthetic materials to reduce the usage of hazardous waste and environmental pollution.Among the natural fibre,jute fibre obtained from a bast plant has an increasing trend in the application,especially as a reinforcement material.Numerous research works have been performed on jute fibre with regard to reinforced thermoset and thermoplastic composites.Nevertheless,current demands on sustainable materials have required new developments in thermoplastic composites.In this paper,the author reviews jute plants as reinforcement materials for thermoplastic matrix polymers.This review provides an overview of the sustainability of jute plants as reinforcement material for thermoplastic matrix polymers.The overview on jute based thermoplastic composites focused on the thermal behavior and mechanical properties.Apart from physical,chemical,and mechanical properties,the study also covers the current and perspectives for future research challenges faced by the researchers on jute fibre reinforced thermoplastic composites.
基金support from Universiti Teknologi Malaysia under Research University Grant Tier 1(Project No.Q.J130000.2546.12H25)Flagship UTMShine(Project No.Q.J130000.2446.03G29)Nippon Sheet Glass Foundation for Materials Science and Engineering under Overseas Research Grant Scheme(Project No.Q.J130000.2446.03G29)。
文摘Affordable hydrophobic hollow fibre membranes were prepared using kaolin and alumina based ceramic powders via a combined phase inversion and sintering technique,followed by a grafting with fluoroalkylsilane(FAS).The crux of the matter in this paper is to study the changes in the properties of the hollow fibre membranes(gas permeation,mechanical strength,pore size,porosity,tortuosity,morphology,and contact angle)by the addition of alumina(Al2O3)to the pure kaolin with mono or multiparticle sizes.By varying the overall loading and particle size of alumina addition,different morphologies of the membranes were obtained due to the differences in the path lengths during phase inversion process for each solvent and nonsolvent exchange.The successful grafting with FAS was evidenced by the increase in contact angle from nearly equal to zero degree before grafting to 140°after grafting.Kaolin-alumina-4,one of the hollow fibres fabricated in this work,achieved a mean pore size of 0.25μm with the bending strength of 96.4 MPa and high nitrogen permeance of 2.3×10^(-5) mol·m^(-2)·Pa^(-1)·s^(-1),which makes the hollow fibre most suitable for the membrane contactor application.
文摘Background: Surgery is the treatment for early-stage cervical cancer. Radiochemotherapy is used in the treatment of locally advanced stages. But the choice of treatment can be difficult. Objective: The objective of this work was to evaluate the therapeutic aspects of cervical cancer in the early stages IA to IIA in the oncology department of A Ledantec Hospital in Dakar. Patients and methods: This was a descriptive retrospective study, from January 2015 to December 2020, in the oncology department of A Ledantec Hospital, including all the patients who had been treated for early-stage invasive cervical cancer. Results: We included 28 patients. The average age was 49.54 years old. There were 11 patients (39.3%) with a stage ≤ IB1. Surgery was the first in 14 patients (50%). The initial approach was a midline supra and subumbilical laparotomy. The surgery was R0 in 65.22%. Postoperative complications were found in 4 patients including 1 case of operative wound suppuration, 1 case of dysuria, 1 case of postoperative eventration and 1 case of rectovaginal fistula. Concomitant Radiochemotherapy was neoadjuvant in 7 cases (25%), adjuvant in 14 cases (50%). The chemotherapy was neoadjuvant in 09 cases (56.25%) and adjuvant in 7 cases (43.75%) with minor toxicities. We had recorded 2 deaths. Conclusion: The treatment of the early stages of invasive cervical cancer is based on surgery. Neoadjuvant treatments may be useful in particular situations.
文摘Anterior segment dysgenesis is a group of non-acquired ocular anomalies whose cause is multifactorial;many genes are involved. It is characterized by developmental anomalies of the tissues of the anterior segment, of which Peters-Plus syndrome is included. Our aim is to describe the different ophthalmological and systemic aspects of Peters-Plus syndrome in order to improve the quality of diagnosis of this syndrome even in the absence of genetic confirmation, especially in low-income countries or when genetic studies are not available. In this observation, we report the case of a newborn with Peters-Plus syndrome admitted to the neonatology unit. The diagnosis was made on the basis of clinical-radiological criteria, and treatment consisted of caring for the baby and the parents, given the particular psychological context often associated with the birth of a baby with polymalformative syndrome. From this study, Peters-Plus syndrome should be borne in mind in a fetus with typical ocular anomalies, unusual facial appearance and long tubular bone insufficiency, especially in the presence of a positive family history. In such cases, prenatal diagnosis could be an option for the couples. A genetic study should be undertaken to confirm the clinical diagnosis and provide appropriate genetic counseling and prenatal diagnostic options.
文摘Introduction: Bell’s palsy is an uncommon adverse effect of the COVID-19 vaccine that has been reported in clinical trials. Even though a few studies have linked the vaccination to Bell’s palsy, the actual mechanism is uncertain. Objectives: To describe the demographic data and COVID-19 vaccines-related data with Bell’s palsy in a tertiary centre of Malaysia, Hospital Kuala Lumpur. Methods: A retrospective cross-sectional study was observed among vaccinated recipients who developed Bell’s palsy within 60 days and sought treatment in the Otorhinolaryngology Department Hospital Kuala Lumpur, Malaysia between 1<sup>st</sup> May 2021 and 30<sup>th</sup> November 2021. The demographic data, clinical history, and vaccination history were collected from clinical records. The facial paralysis was graded according to the House-Brackmann grading system. Results: A total of 26 patients with a mean age was 38.5 years;higher incidence in younger age, below 60 years old (n = 24), specifically 18 - 30 years old (n = 11). We observed an equal number in relation to gender and onset (after the first or second dose) of facial palsy. Predominantly were Malay (n = 21) and only 6 patients had comorbidities. We found there was no difference in regard to the type of vaccine among Bell’s palsy patients;Pfizer (n = 9), followed by Sinovac (n = 9) and AstraZeneca (n = 8). Conclusion: Bell’s palsy was found to be a possible adverse event of the COVID-19 vaccine. Younger groups were noted as susceptible to this rare adverse effect. However, the benefits of vaccination outweigh the risk of Bell’s palsy, which has a good prognosis. More research with larger samples is needed to determine the true relationship between vaccination and Bell’s palsy.
文摘Haze episodes have become a major concern in Malaysia over the past few decades and have an increasingly important impact on the country each and every year. During haze episodes from biomass burning in Southeast Asia, particularly from Sumatra, Indonesia, particulate matter PM2.5 is found to be one of the dangerous sources of airborne pollution and is known to seriously affect human health. This study determines the composition of carbohydrates （as levoglucosan）, surfactants, major elements, and anions in PM2.5 during a 2013 haze episode. PM2.5 samples were collected from Universiti Kebangsaan Malaysia, Bangi, using a high volume sampler during a seven-day monitoring campaign during the peak of that year＇s haze episode. PM2.5 concentrations ranged between 14.52 and 160.93 μg/m3, exceeding the 2005 WHO air quality guidelines for PM2.5 （25 μg/m3 for 24-h mean）. The patterns for levoglucosan, surfactants, major elements, and anionic compositions were proportional to the PM2.5 concentrations. Changes in PM2.5 observed on days 3 and 4 were influenced by a combination of meteorological factors, which substantiate the theory that such factors play a pivotal role in haze episodes.
文摘A 27 year-old lady,presented with sudden loss of vision in the right eve tor a week.It was followed In poor vision in the left eye alter 3 days.It involved the whole entire visual field and was associated with pain on eye movement.She was diagnosed to have miliary tuberculosis and retroviral disease 4 months ago.She was started on anti-TB since then but defaulted highly active anti-retroviral therapy(HAART).On examination.her visual acuity was no perception of light in the right eye and 6/120(pinhole 3/60) in the lelt eye.Anterior segment in both eyes was unremarkable.Funduscopy showed bilateral optic disc swelling with presence ot multiple foci of choroiditis in the peripheral retina.The vitreous and relinal vessels were normal.Chest radiography was normal.CT scan of orbit and brain revealed bilateral enhancement of the optic nerve sheath that suggest the diagnosis of bilateral atypical optic neuritis.This patient was managed with infectious disease team.She was started on HAART and anti-TB treatment was continued.She completed anti-TB treatment alter 9 months without any serious side effects.During follow up the visual acuity in both eyes was not improved.However.funduscopy showed resolving ol disc swelling and choroiditis following treatment.
文摘The intercostobrachial nerve (ICBN) is responsible for the sensory</span></span></span></span></span><span><span><span><span><span><span style="font-family:""><span style="font-family:Verdana;"> innervation of a part of the inner side of the arm. Injury of the intercostobrachial nerve is </span><span style="font-family:Verdana;">a complication of axillary dissection during lymph node dissection.</span> <b><span style="font-family:Verdana;">Objective</span></b><span style="font-family:Verdana;">: </span><span style="font-family:Verdana;">This study aimed to determine the effect of preservation of the</span><span style="font-family:Verdana;"> intercostobra</span><span><span style="font-family:Verdana;">chial nerve on postoperative sensory disturbances. </span><b><span style="font-family:Verdana;">Methods:</span></b><span style="font-family:Verdana;"> This is a</span></span><span style="font-family:Verdana;"> prospective, single-center study which was carried out in 90 patients followed in the oncology department of the Aristide Le Dantec hospital in Dakar, suffering </span><span style="font-family:Verdana;">from breast cancer and having undergone breast surgery associated with</span><span style="font-family:Verdana;"> axillary </span><span style="font-family:Verdana;">dissection, for a period of 6 months. The patients were divided into two</span><span style="font-family:Verdana;"> groups depending on whether the intercostobrachial nerve (ICBN) was preserved or </span><span style="font-family:Verdana;">not. The two groups were compared in terms of the incidence of sensory</span><span style="font-family:Verdana;"> disturbances. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> Sixty patients without nerve preservation and 30 patients with nerve preservation were included in the study, </span><i><span style="font-family:Verdana;">i.e.</span></i><span style="font-family:Verdana;">, 90 patients in total. </span><span style="font-family:Verdana;">ICBN was injured in 60 pa
文摘<strong>Introduction:</strong><span><span><span style="font-family:""><span style="font-family:Verdana;"> Cystic breast cancer is a rare entity. Breast cysts are most often benign. The clinical characteristics of malignancy are not specific. </span><b><span style="font-family:Verdana;">Objective:</span></b> <span style="font-family:Verdana;">To report a series of malignant cystic tumors of the breast and to describe</span><span style="font-family:Verdana;"> their different characteristics. </span><b><span style="font-family:Verdana;">Materials and Methods:</span></b><span style="font-family:Verdana;"> This was an observational study carried out between January 2018 and October 2021 at the Dakar </span><span style="font-family:Verdana;">university surgical oncology unit. We studied the clinical appearance, im</span><span style="font-family:Verdana;">ag</span><span style="font-family:Verdana;">ing, </span><span style="font-family:Verdana;">histopathology, extent of disease and treatment. We did not include cases of</span><span style="font-family:Verdana;"> pure, single, or multiple chronically progressive cysts. </span><b><span style="font-family:Verdana;">Results:</span></b><span style="font-family:Verdana;"> There were 8 </span><span style="font-family:Verdana;">patients, 6 women and 2 men. The average age was 44. All patients presented </span><span style="font-family:Verdana;">with a palpable unilateral deforming skin mass without inflammatory </span><span style="font-family:Verdana;">character. One patient presented with a bloody discharge. The cyst was</span><span style="font-family:Verdana;"> multilocular with</span><span style="font-family:Verdana;">out intracystic growth in 2 cases and presented a growth signal in 6 cases.</span> <span style="font-family:Verdana;">Imaging was ACR 3 in 5 cases and ACR 4 in 3 cases. Histopathology found 6</span><span style="font-family:Verdana;"> in</span><span style="font-family:Verdana;">va</span><span style="font-family:Verdana;">sive carcinomas including 2 papillary, 3 In
文摘Geophysical study and watershed hydrological delineation have been integrated at downstream of Alasra dam site Norh Azraq area to investigate their potential for artificial groundwater recharge. The total surface area of the watershed was found to be about 195 square kilometers. The estimated annual runoff volumes for the Alasra watershed ranged between 1.2 and 1.8 MCM. Moreover, the interpretation of Ten Time Domain Electromagnetic (TDEM) soundings suggested three principal subsurface layers. The top surface layer has an intermediate resistivity (90 - 110 Ohm·m) with a thickness ranging from a few meters to around 50 m. This layer was interpreted as superficial deposits. The second subsurface layer with variably high resistivity values is composed of unsaturated massive basalt layer and probably belongs to Madhala Olivine Phyric Basalt Formation (MOB). The large variations in resistivity could be ascribed to the degree of water saturation (as a result of groundwater recharge from the nearby harvested water dam), or lithological variations (clay content) and/or due to structural control. The third subsurface layer has low resistivity values (·m to 40 Ω·m) and was found at a depth ranging from 120 to 150 m. This layer could represent a saturated basalt layer with high clay contents. The subsurface structures and major faults have been identified. Based on the results of this study, a combination of surface and subsurface artificial groundwater recharge techniques is highly recommended.
