Shepherd＇s purse seeds were collected from winter wheat fields and road sides in Hebei Province,China.Their sensitivities to tribenuron-methyl were evaluated in a whole plant dose response assay in the greenhouse.Res...Shepherd＇s purse seeds were collected from winter wheat fields and road sides in Hebei Province,China.Their sensitivities to tribenuron-methyl were evaluated in a whole plant dose response assay in the greenhouse.Results revealed that HB-1,HB-2,HB-3,HB-4,HB-6,HB-7,HB-17,HB-18,HB-19,HB-20,HB-21,and HB-22 populations were susceptible to tribenuron-methyl characterised by very low GR50 values of about 0.10 g a.i.ha-1.On the other hand,populations HB-15 and HB-16 had moderate resistance to tribenuron-methyl with resistance indices （RI） ranging from 10-100 folds,whilst populations HB-5,HB-8,HB-9,HB-10,HB-11,HB-12,HB-13,and HB-14 expressed high level of resistance to tribenuron-methyl with resistance indices over 100.The proportion of moderate resistance level was about 9.09%,and that of high resistance was about 36.36%.展开更多
Dogs are used for centuries as people helpers. One of possible use is a sport and service. BSM （Belgian Shepherd Malinois） and GS （German shepherd） dogs are most used breeds like service dogs and also most represe...Dogs are used for centuries as people helpers. One of possible use is a sport and service. BSM （Belgian Shepherd Malinois） and GS （German shepherd） dogs are most used breeds like service dogs and also most represented at sports competitions. Our aim was to compare the results of these breeds in the World Cup of International tests of working dogs （in years 2003-2011）, which is the peak of competitions. The authors evaluated results of German shepherd dog performance test and Belgian shepherd Malinois performance in disciplines such as tracking, obedience and defense. Belgian Shepherds achieved in all disciplines higher score than German shepherds. It was found out that Belgian shepherd Malinois get significant higher score in all disciplines （tracking, obedience and defense） than German shepherd. However, both of breeds are used successfully as service dogs.展开更多
BACKGROUND Surgical correction of femoral deformities in polyostotic fibrous dysplasia(PFD)or McCune-Albright syndrome(MAS),such as coxa vara or shepherd’s crook deformity,is a challenge.AIM To evaluate the treatment...BACKGROUND Surgical correction of femoral deformities in polyostotic fibrous dysplasia(PFD)or McCune-Albright syndrome(MAS),such as coxa vara or shepherd’s crook deformity,is a challenge.AIM To evaluate the treatment of patients with femoral deformities caused by PDF or MAS treated by osteotomies and stabilized with different methods,by analyzing the most relevant studies on the topic.METHODS A literature search was performed in Medline database(PubMed).Articles were screened for patients affected by PFD or MAS surgically managed by osteotomies and stabilized with different methods.RESULTS The initial search produced 184 studies,with 15 fulfilling the eligibility criteria of our study.Selected articles(1987-2019)included 111 patients overall(136 femurs).CONCLUSION Based on our results,the preferred method to stabilize corrective osteotomies is intramedullary nailing with neck cross pinning.When the deformity is limited to the proximal part of the femur,a screw or blade plate may be used,although there is a high risk of fracture below the plate.When the femur is entirely involved,a two-stage procedure may be considered.展开更多
为了解决无人机在跟踪羊群时,因飞行距离过近容易造成羊群受到惊吓的问题,笔者提出了一种无人机跟踪羊群时判断羊群状态的方法,即无人机采用YOLOv5-DeepSort(you only look once-DeepSort)算法对羊群进行定位跟踪,采用融合均值漂移(mean...为了解决无人机在跟踪羊群时,因飞行距离过近容易造成羊群受到惊吓的问题,笔者提出了一种无人机跟踪羊群时判断羊群状态的方法,即无人机采用YOLOv5-DeepSort(you only look once-DeepSort)算法对羊群进行定位跟踪,采用融合均值漂移(mean shift)和K-means聚类算法的MSK(mean shift-K-means)算法判断羊群是否受到惊吓。结果表明:YOLOv5-DeepSort算法能够用于准确定位并跟踪羊群,MSK算法能够准确判断羊群是否受到惊吓。说明该羊群状态判断方法可以用于提示无人机是否需要自动增加跟踪距离,使无人机跟踪羊群时不会造成羊只惊吓。展开更多
Dogs were the first animal to become domesticated by humans,and they represent a classic model system for unraveling the processes of domestication.We compare Australian dingo eye contact and socialization with Basenj...Dogs were the first animal to become domesticated by humans,and they represent a classic model system for unraveling the processes of domestication.We compare Australian dingo eye contact and socialization with Basenji and German Shepherd dog(GSD)breeds.Australian dingoes arrived in Australia 5,000–8,000 BP,and there is debate whether they were domesticated before their arrival.The Basenji represents a primitive breed that diverged from the remaining breeds early in the domestication process,while GSDs are a breed dog selected from existing domestic dogs in the late 1800s.We conducted a 4-phase study with unfamiliar and familiar investigators either sitting passively or actively calling each canid.We found 75%of dingoes made eye contact in each phase.In contrast,86%of Basenjis and 96%of GSDs made eye contact.Dingoes also exhibited shorter eye-gaze duration than breed dogs and did not respond to their name being called actively.Sociability,quantified as a canid coming within 1m of the experimenter,was lowest for dingoes and highest for GSDs.For sociability duration,dingoes spent less time within 1m of the experimenter than either breed dog.When compared with previous studies,these data show that the dingo is behaviorally intermediate between wild wolves and Basenji dogs and suggest that it was not domesticated before it arrived in Australia.However,it remains possible that the accumulation of mutations since colonization has obscured historical behaviors,and dingoes now exist in a feralized retamed cycle.Additional morphological and genetic data are required to resolve this conundrum.展开更多
这里是世界级星空保护区,曾在无数游记中看过这里,当身临其境时感觉依然如此美妙,蓝天、白云、教堂后的湖泊、雪山,把这简单纯朴的教堂衬托得如此美丽。Church of the Good Shepherd好牧羊人教堂这座教堂由著名建筑师本杰明·伍尔...这里是世界级星空保护区,曾在无数游记中看过这里,当身临其境时感觉依然如此美妙,蓝天、白云、教堂后的湖泊、雪山,把这简单纯朴的教堂衬托得如此美丽。Church of the Good Shepherd好牧羊人教堂这座教堂由著名建筑师本杰明·伍尔菲尔德·芒福德于1935年建造,其设计的哥特式木结构和石结构建筑在新西兰独一无二。特卡波湖离基督城3个小时的车程,适合划船和其他活动。展开更多
The five basic senses-taste, touch, sight, hearing, smell-were firstdescribed by the Greek philosopher Aristotle over 2000 years ago. Yet on-ly within the past few years have researchers started unlocking the deepests...The five basic senses-taste, touch, sight, hearing, smell-were firstdescribed by the Greek philosopher Aristotle over 2000 years ago. Yet on-ly within the past few years have researchers started unlocking the deepestsecrets of our senses and how they work. As part of thid new knowledge.we now recognize senses not known to Aristotle. "For instance." says Dr.Gordon Shepherd. Yale University professor of neurobiology. "We alsohave a sense of balance, which orients our body in a world of gravity, ofup and down,just as surely as our eyes let us perceive a world with light."展开更多
基金supported by the State Key Laboratory for Biology of Plant Diseases and Insect Pests,Institute of Plant Protection (IPP),Chinese Academy of Agricultural Sciences,China (SKL2010OP15)the National Natural Science Foundation of China (31000856)
文摘Shepherd＇s purse seeds were collected from winter wheat fields and road sides in Hebei Province,China.Their sensitivities to tribenuron-methyl were evaluated in a whole plant dose response assay in the greenhouse.Results revealed that HB-1,HB-2,HB-3,HB-4,HB-6,HB-7,HB-17,HB-18,HB-19,HB-20,HB-21,and HB-22 populations were susceptible to tribenuron-methyl characterised by very low GR50 values of about 0.10 g a.i.ha-1.On the other hand,populations HB-15 and HB-16 had moderate resistance to tribenuron-methyl with resistance indices （RI） ranging from 10-100 folds,whilst populations HB-5,HB-8,HB-9,HB-10,HB-11,HB-12,HB-13,and HB-14 expressed high level of resistance to tribenuron-methyl with resistance indices over 100.The proportion of moderate resistance level was about 9.09%,and that of high resistance was about 36.36%.
文摘Dogs are used for centuries as people helpers. One of possible use is a sport and service. BSM （Belgian Shepherd Malinois） and GS （German shepherd） dogs are most used breeds like service dogs and also most represented at sports competitions. Our aim was to compare the results of these breeds in the World Cup of International tests of working dogs （in years 2003-2011）, which is the peak of competitions. The authors evaluated results of German shepherd dog performance test and Belgian shepherd Malinois performance in disciplines such as tracking, obedience and defense. Belgian Shepherds achieved in all disciplines higher score than German shepherds. It was found out that Belgian shepherd Malinois get significant higher score in all disciplines （tracking, obedience and defense） than German shepherd. However, both of breeds are used successfully as service dogs.
文摘BACKGROUND Surgical correction of femoral deformities in polyostotic fibrous dysplasia(PFD)or McCune-Albright syndrome(MAS),such as coxa vara or shepherd’s crook deformity,is a challenge.AIM To evaluate the treatment of patients with femoral deformities caused by PDF or MAS treated by osteotomies and stabilized with different methods,by analyzing the most relevant studies on the topic.METHODS A literature search was performed in Medline database(PubMed).Articles were screened for patients affected by PFD or MAS surgically managed by osteotomies and stabilized with different methods.RESULTS The initial search produced 184 studies,with 15 fulfilling the eligibility criteria of our study.Selected articles(1987-2019)included 111 patients overall(136 femurs).CONCLUSION Based on our results,the preferred method to stabilize corrective osteotomies is intramedullary nailing with neck cross pinning.When the deformity is limited to the proximal part of the femur,a screw or blade plate may be used,although there is a high risk of fracture below the plate.When the femur is entirely involved,a two-stage procedure may be considered.
基金supported by Australian Research Council Discover Project 150102038.
文摘Dogs were the first animal to become domesticated by humans,and they represent a classic model system for unraveling the processes of domestication.We compare Australian dingo eye contact and socialization with Basenji and German Shepherd dog(GSD)breeds.Australian dingoes arrived in Australia 5,000–8,000 BP,and there is debate whether they were domesticated before their arrival.The Basenji represents a primitive breed that diverged from the remaining breeds early in the domestication process,while GSDs are a breed dog selected from existing domestic dogs in the late 1800s.We conducted a 4-phase study with unfamiliar and familiar investigators either sitting passively or actively calling each canid.We found 75%of dingoes made eye contact in each phase.In contrast,86%of Basenjis and 96%of GSDs made eye contact.Dingoes also exhibited shorter eye-gaze duration than breed dogs and did not respond to their name being called actively.Sociability,quantified as a canid coming within 1m of the experimenter,was lowest for dingoes and highest for GSDs.For sociability duration,dingoes spent less time within 1m of the experimenter than either breed dog.When compared with previous studies,these data show that the dingo is behaviorally intermediate between wild wolves and Basenji dogs and suggest that it was not domesticated before it arrived in Australia.However,it remains possible that the accumulation of mutations since colonization has obscured historical behaviors,and dingoes now exist in a feralized retamed cycle.Additional morphological and genetic data are required to resolve this conundrum.
文摘这里是世界级星空保护区,曾在无数游记中看过这里,当身临其境时感觉依然如此美妙,蓝天、白云、教堂后的湖泊、雪山,把这简单纯朴的教堂衬托得如此美丽。Church of the Good Shepherd好牧羊人教堂这座教堂由著名建筑师本杰明·伍尔菲尔德·芒福德于1935年建造,其设计的哥特式木结构和石结构建筑在新西兰独一无二。特卡波湖离基督城3个小时的车程,适合划船和其他活动。
文摘The five basic senses-taste, touch, sight, hearing, smell-were firstdescribed by the Greek philosopher Aristotle over 2000 years ago. Yet on-ly within the past few years have researchers started unlocking the deepestsecrets of our senses and how they work. As part of thid new knowledge.we now recognize senses not known to Aristotle. "For instance." says Dr.Gordon Shepherd. Yale University professor of neurobiology. "We alsohave a sense of balance, which orients our body in a world of gravity, ofup and down,just as surely as our eyes let us perceive a world with light."
