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Body Size but Not Food Size Determined head Sexual Dimorphism in Rana kukunoris from the Tibetan Plateau

Asian Herpetological Research 2023年第2期14卷 175-181页

作者： Hongzhou CHEN Haifen QIN Zhenkun ZHAO Jiahong LIAO Yanfang WU Xueyan LIU Lichun JIANG Buddhi DAYANANDA Wei CHEN School of Resources and Environmental Engineering Anhui UniversityHefei 230601AnhuiChina Key Laboratory for Molecular Biology and Biopharmaceutics School of Life Science and TechnologyMianyang Normal UniversityMianyang 621000SichuanChina School of Agriculture and Food Sciences The University of QueenslandBrisbane QLD 4072Australia

Sexual dimorphism between males and females is a common pattern observed in the natural world and has become one of the main focuses of evolutionary *** head size and shape are important factors that may influence food acquisition,but knowledge about the sexual differences between amphibian head size and shape is relatively ***,intersexual differences in the head size and shape of Rana kukunoris,which is a high-elevation frog from the Qinghai-Tibet Plateau,were *** differences were found in the head shape but not the head size between sexes.A significant correlation was also observed between prey size and head ***,these correlations disappeared when individual body size was controlled,suggesting that body size but not food size was the main factor resulting in intersexual differences in head size/*** results suggested that food competition between sexes did not result in sexual dimorphism of head shape among these frogs.

关键词： amphibians head shape morphometrics Rana Rana kukunoris sexual dimorphism

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Computed Tomography Assessment of Cephalic Index and Sella Turcica Dimensions and Morphology in a Nigerian Population

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Journal of Forensic Science and Medicine 2023年第2期9卷 112-119页

作者： Hyacienth Uche Chiegwu Okon Etim Bassey Christopher Chukwuemeka Ohagwu Thomas Adejoh Daniel Dirioha Odunko Department of Radiography and Radiological Sciences Nnamdi Azikiwe UniversityAwkaAnambra StateNigeria Department of Radiography and Radiation Sciences Federal University of TechnologyOwerriImo StateNigeria Radiology Department Federal Medical CentreYenagoaBeyelsa StateNigeria

Cephalic index(CI)is the percentage of biparietal diameter to the occipitofrontal diameter of the skull and can be used in forensic investigations in cases of disputed identity where only fragments of the head/skull are *** sella turcica houses the pituitary gland whose hormones regulate the functions of many other glands and systems of the *** sizes of sella turcica could indicate sella/pituitary pathology with health *** study aimed to assess CI,head shapes and sella turcica dimensions and morphology of the Yoruba tribe of *** objectives are:to relate CI and head shapes with sella turcica dimensions and morphology,to use CI and head shape to identify and distinguish the Yoruba tribe from other tribes,to use CI and head shape to distinguish between ***/head and sella turcica dimensions were measured on 321 retrospectively enlisted normal cranial Computed Tomography(CT)images of Yoruba subjects,mean age 55(SD±17)years,in a Tertiary Hospital in South-West Nigeria between January 2020 and April 2021,and then CI *** was analyzed using IBM SPSS 27(IBM ***,NY,USA,2019).Predominant head shape of the studied group was *** CI was 70.0±3.7 and showed no statistically significant difference between gender(P=0.097).Mean sella length,depth;and anteroposterior diameter was 1.22±0.24 cm,0.80±0.15 cm,1.34±0.25 cm *** sella length and depth showed significant difference between gender(P=0.0001;P=0.032)*** shape has no association with sella dimensions and *** shape and CI may stratify populations in forensic practice and surgical planning.

关键词： Cephalic index Computed Tomography head shape Sella turcica dimensions and morphology Yoruba tribe of Nigeria

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Effect of Nose shape on Semi-Armor-Piercing Warhead Penetration Performance

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Journal of Shanghai Jiaotong university(Science) 2015年第4期20卷 468-471页

作者：石全熊飞刘锋陈材 Department of Equipment Command & Management Mechanical Engineering College

The numerical simulations of different head shape semi-armor-piercing warheads penetrating thin steel target are done using the finite element software ANSYS/LS-DYNA, and the whole process of different nose shape semi-armor-piercing warheads vertically penetrating the thin steel plate is compared. Besides, the influence of impact angle on penetration performance of three different nose shape projectiles is researched. The analysis results indicate that the nose shape has a significant influence on semi-armor-piercing warhead penetration *** effect of impact angle on the three kinds of projectiles' residual kinetic energy and deflection is different. The research results provide references for designing of warhead and battlefield damage assessment.

关键词： penetration head shape finite element

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Occipital pressure sores in two neonates

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Burns & Trauma 2015年第3期3卷 161-165页

作者： Yi Liu Bin Xiao Cheng Zhang Zhihong Su Center of Burns and Plastic Surgery of Chinese People’s Liberation Army Lanzhou General Hospital of Lanzhou Command333 Binghe South StreetLanzhou 730050China

The preference for a specific head shape can be influenced by people's culture,religious beliefs and *** Chinese people prefer a"talented"head shape,which is rounded and has a long *** obtain their preferred head shape,some parents try to change their neonates'sleeping *** to these forced sleeping positions,positional skull deformities,such as plagiocephaly,may be present during the first few months of *** this article,we report two neonatal cases,of Hui nationality and Dongxiang nationality,with occipital pressure sores that were caused by using hard objects as pillows with the intention of obtaining a flattened *** pressure sores were deep to the occipital bone and needed surgical *** pressure sores caused wounds that were repaired by local skin flaps,after debridement,and the use of external constraints from a dense sponge-made head frame for approximately two *** case recovered with primary healing after surgical *** other case suffered from a disruption of the sutured wound,and a secondary operation was performed to cover the *** occipital pressure sores are avoidable by providing guidance to the parents in ethnic minorities'area regarding the prevention,diagnosis and management of positional skull deformity.

关键词： head shape Local skin flap Neonates Occiput Pressure sore

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