The ciphertext-policy（CP） attribute-based encryption（ABE）（CP-ABE） emergings as a promising technology for allowing users to conveniently access data in cloud computing. Unfortunately, it suffers from several dra...The ciphertext-policy（CP） attribute-based encryption（ABE）（CP-ABE） emergings as a promising technology for allowing users to conveniently access data in cloud computing. Unfortunately, it suffers from several drawbacks such as decryption overhead, user revocation and privacy preserving. The authors proposed a new efficient and privacy-preserving attribute-based broadcast encryption（BE）（ABBE） named EP-ABBE, that can reduce the decryption computation overhead by partial decryption, and protect user privacy by obfuscating access policy of ciphertext and user＇s attributes. Based on EP-ABBE, a secure and flexible personal data sharing scheme in cloud computing was presented, in which the data owner can enjoy the flexibly of encrypting personal data using a specified access policy together with an implicit user index set. With the proposed scheme, efficient user revocation is achieved by dropping revoked user＇s index from the user index set, which is with very low computation cost. Moreover, the privacy of user can well be protected in the scheme. The security and performance analysis show that the scheme is secure, efficient and privacy-preserving.展开更多
Resolution is undoubtedly the most important parameter in optical microscopy by providing an estimation on the maximum resolving power of a certain optical microscope. For centuries, the resolution of an optical micro...Resolution is undoubtedly the most important parameter in optical microscopy by providing an estimation on the maximum resolving power of a certain optical microscope. For centuries, the resolution of an optical microscope is generally considered to be limited only by the numerical aperture of the optical system and the wavelength of light. However, since the invention and popularity of various advanced fluorescence microscopy techniques, especially super-resolution fluorescence microscopy, many new methods have been proposed for estimating the resolution, leading to confusions for researchers who need to quantify the resolution of their fluorescence microscopes. In this paper, we firstly summarize the early concepts and criteria for predicting the resolution limit of an ideal optical system. Then, we discuss some important influence factors that deteriorate the resolution of a certain fluorescence microscope. Finally, we provide methods and examples on how to measure the resolution of a fluorescence microscope from captured fluorescence images. This paper aims to answer as best as possible the theoretical and practical issues regarding the resolution estimation in fluorescence microscopy.展开更多
Aim: Peri-commisural defect reconstruction using the Abbe or Estlander flaps tend to pilfer tissue from the lower lip, contributing to microstomia, with its attendant problems. In this study, we aim to design a flap f...Aim: Peri-commisural defect reconstruction using the Abbe or Estlander flaps tend to pilfer tissue from the lower lip, contributing to microstomia, with its attendant problems. In this study, we aim to design a flap for more superficial defects, in which the underlying orbicularis oris muscle can be preserved when resecting peri-commisural skin malignancies whilst also ensuring completeness of excision. Methods: In a retrospective case review of 7 cases at our institution over a 12-month period (2016-2017), we conceptually designed a perforator-plus fascio-cutaneous flap from within the labio-mandibular fold with a 6-month follow-up in terms of oncological clearance and aesthetic outcome. The cohort was composed of patients with skin cancers e.g. basal and squamous cell carcinomas, presenting to a tertiary care facial plastic surgery centre. The technique involved raising a flap from within the peri-oral area, with a scar disguised along the labio-mandibular and naso-labial folds which allows for both an aesthetic reconstruction and the preservation of the oral sphincter mechanism, by avoiding microstomia. The outcomes measured were (1) to ascertain whether this procedure is oncologically safe, (2) there were instances of microstomia and (3) aesthetic appearance. Results: All oncological lesions were completely excised in all cases and at up to six months' follow-up, there were no instances of recurrence. Functionally, oral sphincter function was preserved in all instances as was aesthetic appearance. Conclusion: The labio-mandibular flap is an oncologically safe procedure for skin cancers whilstpreserving oral sphincter function and maintaining aesthetics. It is hence, a superior alternative to Abbe and Estlander flaps, for more superficial defects, not requiring mucosal excision.展开更多
Objective To explore an ideal method for the correction of the secondary nasolabial deformities of bilateral cleft lip. Methods From January 2013 to December 2018 ,repairing nose and lip in median of the median upper ...Objective To explore an ideal method for the correction of the secondary nasolabial deformities of bilateral cleft lip. Methods From January 2013 to December 2018 ,repairing nose and lip in median of the median upper lip flap and lower lip Abbe flap in 13 patients with secondary nasolabial deformity of cleft lip, implanting artificial nose prosthesis when necessary. Results All the flaps were survived and nose appearance was greatly improved. The shape of the upper lip turned more similar to normal. Coordination between upper lip and lower lip was appropriate. Conclusion The median upper lip flap combined with lower lip Abbe flap to repair the secondary nasolabial deformities of bilateral cleft lip is effective . Goo d cosmetic results can be obtained.展开更多
基金supported by the National Natural Science Foundation of China (No. 61272519)
文摘The ciphertext-policy（CP） attribute-based encryption（ABE）（CP-ABE） emergings as a promising technology for allowing users to conveniently access data in cloud computing. Unfortunately, it suffers from several drawbacks such as decryption overhead, user revocation and privacy preserving. The authors proposed a new efficient and privacy-preserving attribute-based broadcast encryption（BE）（ABBE） named EP-ABBE, that can reduce the decryption computation overhead by partial decryption, and protect user privacy by obfuscating access policy of ciphertext and user＇s attributes. Based on EP-ABBE, a secure and flexible personal data sharing scheme in cloud computing was presented, in which the data owner can enjoy the flexibly of encrypting personal data using a specified access policy together with an implicit user index set. With the proposed scheme, efficient user revocation is achieved by dropping revoked user＇s index from the user index set, which is with very low computation cost. Moreover, the privacy of user can well be protected in the scheme. The security and performance analysis show that the scheme is secure, efficient and privacy-preserving.
基金supported by the National Natural Science Foundation of China (81427801, 81827901)National Basic Research Program of China (2015CB352003)+2 种基金Science Fund for Creative Research Groups (61721092)Fundamental Research Funds for the Central Universities (2018KFYXKJC039)Director Fund of WNLO。
文摘Resolution is undoubtedly the most important parameter in optical microscopy by providing an estimation on the maximum resolving power of a certain optical microscope. For centuries, the resolution of an optical microscope is generally considered to be limited only by the numerical aperture of the optical system and the wavelength of light. However, since the invention and popularity of various advanced fluorescence microscopy techniques, especially super-resolution fluorescence microscopy, many new methods have been proposed for estimating the resolution, leading to confusions for researchers who need to quantify the resolution of their fluorescence microscopes. In this paper, we firstly summarize the early concepts and criteria for predicting the resolution limit of an ideal optical system. Then, we discuss some important influence factors that deteriorate the resolution of a certain fluorescence microscope. Finally, we provide methods and examples on how to measure the resolution of a fluorescence microscope from captured fluorescence images. This paper aims to answer as best as possible the theoretical and practical issues regarding the resolution estimation in fluorescence microscopy.
文摘Aim: Peri-commisural defect reconstruction using the Abbe or Estlander flaps tend to pilfer tissue from the lower lip, contributing to microstomia, with its attendant problems. In this study, we aim to design a flap for more superficial defects, in which the underlying orbicularis oris muscle can be preserved when resecting peri-commisural skin malignancies whilst also ensuring completeness of excision. Methods: In a retrospective case review of 7 cases at our institution over a 12-month period (2016-2017), we conceptually designed a perforator-plus fascio-cutaneous flap from within the labio-mandibular fold with a 6-month follow-up in terms of oncological clearance and aesthetic outcome. The cohort was composed of patients with skin cancers e.g. basal and squamous cell carcinomas, presenting to a tertiary care facial plastic surgery centre. The technique involved raising a flap from within the peri-oral area, with a scar disguised along the labio-mandibular and naso-labial folds which allows for both an aesthetic reconstruction and the preservation of the oral sphincter mechanism, by avoiding microstomia. The outcomes measured were (1) to ascertain whether this procedure is oncologically safe, (2) there were instances of microstomia and (3) aesthetic appearance. Results: All oncological lesions were completely excised in all cases and at up to six months' follow-up, there were no instances of recurrence. Functionally, oral sphincter function was preserved in all instances as was aesthetic appearance. Conclusion: The labio-mandibular flap is an oncologically safe procedure for skin cancers whilstpreserving oral sphincter function and maintaining aesthetics. It is hence, a superior alternative to Abbe and Estlander flaps, for more superficial defects, not requiring mucosal excision.
文摘Objective To explore an ideal method for the correction of the secondary nasolabial deformities of bilateral cleft lip. Methods From January 2013 to December 2018 ,repairing nose and lip in median of the median upper lip flap and lower lip Abbe flap in 13 patients with secondary nasolabial deformity of cleft lip, implanting artificial nose prosthesis when necessary. Results All the flaps were survived and nose appearance was greatly improved. The shape of the upper lip turned more similar to normal. Coordination between upper lip and lower lip was appropriate. Conclusion The median upper lip flap combined with lower lip Abbe flap to repair the secondary nasolabial deformities of bilateral cleft lip is effective . Goo d cosmetic results can be obtained.
