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Solitary Osteogenic Exostosis of the Femur Revealed by Recurring Acute Distal Thigh Pain: About a Case

Open Journal of Pediatrics 2024年第4期14卷 719-726页

作者： Thierno saïdou Barry Mohamed Lamine sadou sacko Balla Keita Sory Sidimé Moussa Condé Daniel Agbo-Panzo Pediatric Surgery Department Donka National Hospital (HND) of the University Hospital of Conakry Gamal Abdel Nasser University of Conakry (UGANC) of Guinea Conakry Guinea Orthopedic and Trauma Surgery Department Donka National Hospital (HND) of the Conakry University Hospital Conakry Guinea

Introduction: Solitary exostoses are the most common benign tumors of the fertile metaphyses of the long bones of children. Their radiological diagnosis of metaphyseal bone growth must be confirmed on pathological examination. These tumors can remain asymptomatic for a long time and reveal themselves during a particularly vascular complication. The objective of this study was to describe the epidemiological, diagnostic, therapeutic and evolutionary aspects of these tumors. Patient and Observation: We report the case of a 15-year-old adolescent girl, with no particular pathological history, received in the pediatric surgery department of the Donka National Hospital (HND) of the Conakry University Hospital for recurrent acute painful swelling of the lower third of the left thigh in an afebrile context accompanied by lameness and stopping school for a few days (2 - 3 days). The symptoms appear to have evolved over the past 3 years and after physical activities. It regresses with rest, analgesics and non-steroidal anti-inflammatory drugs. The notion of trauma and sickle cell disease was not reported in the patient's clinical history. It is the persistence of the symptomatology which motivates the said consultation. On palpation, a small hard mass is noted at the expense of the internal metaphysis of the left distal femur. Deep palpation of this area causes a tingling sensation and during rapid mobilization of the knee. The remainder of the orthopedic examination was unremarkable. Standard x-ray of the femur shows a bony growth with a pointed tip from the distal metaphysis of the left femur. On surgical exploration, we noted a wedge-shaped exostosis oriented towards the vastus medialis muscle. Histological examination of the surgical specimen confirms osteogenic exostosis. There is no recurrence after 2 years. Conclusion: The distal femoral metaphysis is the most common location of solitary osteochondromas in children. Their definitive diagnosis requires the histology of

关键词： Osteogenic Exostosis Osteochondromas Fertile Long Bone Metaphyses Child

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Local Criteria Used by Farmers to Evaluate the Agronomic Performance and the Fertilizing Capacity of Cowpea Varieties: Diversity, Variability and Proximal Relation with Agronomic Measurements in Contrasted sahelian Locations

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Agricultural Sciences 2024年第1期15卷 114-131页

作者： Nouhou salifou Jangorzo Abdoul-Aziz saïdou Abou-Soufianou sadda Abdoulaye Moussa Mamoudou Hassane Bil-Assanou Issoufou Département des Sciences du Sol et Télédétection Université Dan Dicko Dankoulodo de Maradi Maradi Niger. Unité Mixte de Recherche “Diversité et Adaptation des Plantes” (UMR DAP) Université Dan Dicko Dankoulodo de Maradi Maradi Niger Centre Imaan de Support en Recherche Transdisciplinaire (Imaan Research) Niamey Niger Institut de Recherche pour le Développement Niamey Niger Université Boubacar BA de Tillabéri Tillabéri Niger Département des Sciences et Techniques de Productions Végétales Université Dan Dicko Dankoulodo de Maradi Maradi Niger

When contributing to participatory research, farmers usually appreciate the performance of cowpea varieties using qualitative scores. The score they attribute to each variety are based on local knowledge. The specific criteria they individually use to attribute a score are not well described. The objectives of this work were to: 1) identify and describe exhaustively the local criteria used by farmers to measure the agronomic performance of cowpea;2) assess the variability and statistical structure of these farmer criteria across local contexts;3) and analyze the association between these farmer criteria and the classical agronomic measurement. To achieve these objectives, an augmented block design was implemented across fifteen locations in the regions of Maradi, Dosso and Tillabéri, representing a diversity of local contexts. From a set of 36 cowpea varieties, fifteen varieties were sown per location, including five varieties (controls) common to all locations. In each location, two replicates were sown in randomized Fisher’s blocks. After agronomic measurement and participatory evaluation (scoring of varieties by farmers), a group survey (focus group) was conducted in each location to identify the criteria considered by farmers to found their discretional scoring of varieties during the participatory evaluation. The analysis of the data identified, across locations, thirteen criteria defined by farmers to characterize the agronomic performance of cowpea. Some of these criteria were different according to location. Farmers ranked the three varieties with the best performance for each agronomical trait (Top 3 varieties). A comparison of the farmer ranking with the ranking based on agronomic measurements revealed similarity and complementary between both methods. This study highlighted the importance of considering both local and scientific knowledge in local varietal evaluations.

关键词： Agronomic Performance Participatory Research Cowpea Farmers’ Criteria

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Effect of Cr and Co Promoters Addition on Vanadium Phosphate Catalysts for Mild Oxidation of n-Butane

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Journal of Natural Gas Chemistry 2006年第2期15卷 144-148页

作者： Yun hin Taufiq-Yap Putra Laboratory for Catalysis and Technology Department of ChemistryFaculty of ScienceUniversiti Putra Malaysia43400 UPM SerdangSelangorMalaysia

In this study, Cr and Co promoted, as well as unpromoted vanadium phosphate （VPO） catalysts were synthesized by the reaction of V2O5 and o-H3PO4 in organic medium followed by calcination in n-butane/air environment at 673 K. The physico-chemical properties and the catalytic behavior were affected by the addition of Cr and Co dopants. H2-TPR was used to investigate the nature of oxidants in the unpromoted and promoted catalysts. The results showed that both the Cr and Co promoters remarkably lowered the temperature of the reduction peak associated with V^5＋. The amount of oxygen species originated from the active phase, V^4＋, removed was significantly increased for Co and Cr-promoted catalysts. Both Cr and Co dopants improve strongly the n-butane conversion without sacrificing the MA selectivity. A good correlation was observed between the amount of oxygen species removed from V^4＋ phase and the activity for n-butane oxidation to maleic anhydride. This suggested that V^4＋-O was the center for the activation of n-butane.

关键词： n-butane oxidation VPO promoter maleic anhydride TPR

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动态虚拟患者技术在口腔修复领域的应用进展

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中华口腔医学杂志 2024年第3期59卷 267-273页

作者：高雨童撒悦杨静文武汉大学口腔医(学)院修复科、口颌系统重建与再生全国重点实验室、口腔生物医学教育部重点实验室、口腔医学湖北省重点实验室武汉430079 北京大学口腔医学院·口腔医院修复科、国家口腔医学中心、国家口腔疾病临床医学研究中心、口腔生物材料和数字诊疗装备国家工程研究中心、口腔数字医学北京市重点实验室北京100081

随着面部扫描、口内扫描、虚拟面弓、下颌运动轨迹记录等技术在口腔修复领域的发展及应用,动态虚拟患者技术逐渐被应用于口腔修复的术前分析、美学诊断、治疗设计及修复体制作,并成为近年的研究热点。本文从口腔动静态数据获取、动态口... 详细信息

随着面部扫描、口内扫描、虚拟面弓、下颌运动轨迹记录等技术在口腔修复领域的发展及应用,动态虚拟患者技术逐渐被应用于口腔修复的术前分析、美学诊断、治疗设计及修复体制作,并成为近年的研究热点。本文从口腔动静态数据获取、动态口腔虚拟患者的构建、动态口腔虚拟患者的应用优势等方面对动态虚拟患者技术在口腔修复领域中的应用和研究展开综述,以期为相关数字化技术的临床应用提供参考。

关键词：计算机辅助设计牙修复体设计义齿修复术动态虚拟患者

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Resection of Intracranial Giant Cavernous Malformation: Case Report and Literature Review

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Surgical Science 2024年第2期15卷 28-35页

作者： Vinicios Rivelli Da Fonseca Cleverson Martins Kill Mariana Alcantara Hugo Fialho Leonnan De sa Oliveira Lucidio Souza Filho Department of Neurosurgery Hospital Santa Rita Belo Horizonte Brazil

Cerebral cavernous malformations are a rare and congenital vascular malformation that can present as a challenge in neurosurgical management. The term “giant cerebral cavernous malformations” still does not have a clear definition in the literature, with a wide variety of results. It is known, however, that there is an association between the size of the cavernoma and postoperative sequelae, especially in those with a size greater than 3 cm in its largest diameter. We present a case report of resection of a giant brain cavernoma measuring approximately 8 cm in its largest diameter, emphasizing on clinical presentation, diagnoses and postoperative evolution. Additionally, we performed a comprehensive review of the existing literature on the subject, addressing the epidemiology, pathophysiology, diagnostic methods, treatment options, and prognosis associated with this condition.

关键词： Cavernous Malformation Cerebral Cavernous Malformation Giant Cavernous Malformation Cavernous Hemangioma Cavernous Angioma Cavernoma Giant Cavernoma

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核级截止阀抗冲击性能数值分析

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阀门 2024年第4期 454-459页

作者：查洒洒赵晶沈阳工业大学机械工程学院辽宁沈阳110870

为确保对核级截止阀的抗冲击性能进行全面而准确的评估,以核级截止阀为对象,分别采用动力学设计法(DDAM)和时域模拟法在频域和时域上对核级截止阀进行抗冲击计算分析。首先计算截止阀分别在纵向、垂向和横向三个方向上的频域和时域冲击... 详细信息

为确保对核级截止阀的抗冲击性能进行全面而准确的评估,以核级截止阀为对象,分别采用动力学设计法(DDAM)和时域模拟法在频域和时域上对核级截止阀进行抗冲击计算分析。首先计算截止阀分别在纵向、垂向和横向三个方向上的频域和时域冲击载荷,然后对截止阀的抗冲击特性进行仿真计算,得到截止阀三个方向上的位移及应力分布。两种方法计算结果表明,截止阀的阀体两侧拐角部位是截止阀在冲击载荷下的薄弱部分。同时,截止阀对冲击载荷的响应与冲击加载方向有很大关系,截止阀响应的特性都以横向响应为主,要对横向抗冲击设计重点考虑。

关键词：核级截止阀 DDAM方法时域模拟法抗冲击分析

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The multi-peak point phenomenon of broadband microwave reflection caused by inhomogeneous plasma

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Plasma Science and Technology 2024年第7期26卷 1-11页

作者：杨敏齐凯旋杨玖文贾飒刘浩岩陈燕扬李瑾李小平 School of Aerospace Science and Technology Xidian UniversityXi’an 710071People’s Republic of China Taiyuan satellite Launch Center Taiyuan 030173People’s Republic of China Beijing Institute of Nearspace Vehicle’s Systems Engineering Beijing 100076People’s Republic of China

During spacecraft re-entry,the challenge of measuring plasma sheath parameters directly contributes to difficulties in addressing communication *** this work,we have discovered a phenomenon of multiple peaks in reflection data caused by the inhomogeneous *** results show that the multi-peak points fade away as the characteristic frequency is approached,resembling a series of gradually decreasing *** positions and quantities of these points are positively correlated with electron density,yet they show no relation to collision *** phenomenon is of significant reference value for future studies on the spatial distribution of plasmas,particularly for using microwave reflection signals in diagnosing the plasma sheath.

关键词： plasma sheath microwave reflection inhomogeneous plasma

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观众行为视角下的观赏型与信息型展览差异--以云冈石窟主题展为例

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东南文化 2024年第4期 127-139页

作者：巨洒洒何雨蔚黄梓若王思渝杭侃西北大学文化遗产学院陕西西安710127 北京大学考古文博学院北京100871 云冈研究院山西大同037007

调查以两场云冈石窟主题展为例,从观众行为入手,分析观赏型展览和信息型展览的观众行为差异以及这些差异对两类展览的启发。研究表明,观众在两个展览中的主要行为方式均为观看、交流和拍照,但在高频率行为和特殊行为中有所差异。观赏型... 详细信息

调查以两场云冈石窟主题展为例,从观众行为入手,分析观赏型展览和信息型展览的观众行为差异以及这些差异对两类展览的启发。研究表明,观众在两个展览中的主要行为方式均为观看、交流和拍照,但在高频率行为和特殊行为中有所差异。观赏型展览案例出现较为明显的非完成状态的参观,而信息型展览案例的观众动线主要遵循预设的路线。观众偏好视觉性较强的展项,但注意力的持续停留取决于展项是否提供进一步的信息或兴趣刺激点。观赏型展览案例的观众对话以知觉类和联系类为主,信息型展览案例发生频率最多的是与展览相关的浅层次话题。

关键词：观众行为观赏型展览信息型展览

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深度学习赋能课堂提质增效的机理与路径研究

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中国教育学刊 2024年第3期 70-75页

作者：李奇李飒卜彩丽河南师范大学教育学部河南新乡453007

教育高质量发展背景下,如何实现课堂教学的“质效双增”,已经成为基础教育领域关注的热点话题。从深度学习理论出发,通过阐明深度学习的内涵和发生机制,结合提质增效提出的背景,探明深度学习赋能提质增效的内在机理:深度学习通过激发学... 详细信息

教育高质量发展背景下,如何实现课堂教学的“质效双增”,已经成为基础教育领域关注的热点话题。从深度学习理论出发,通过阐明深度学习的内涵和发生机制,结合提质增效提出的背景,探明深度学习赋能提质增效的内在机理:深度学习通过激发学生的内在学习动机,促进其主动投入,进行有意义学习,并采用深层学习方式深度参与、体验感知、批判理解和创新应用,实现高效学习和深层学习,由此有效解决了现实课堂中学生被动、机械、低效和浅层学习问题,达成提质增效的目的。在此基础上,以深度学习理念为本,提出了面向四类课堂提质增效的深度学习生态系统模式,为实现课堂提质增效提供了全方位、多层次、宽领域的实践路径。

关键词：深度学习教育高质量发展提质增效课堂教学

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语体语法视角下中文专业学生文言素养研究

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黑龙江教育（理论与实践） 2024年第7期 42-47页

作者：王飒信阳学院文学院河南信阳464000

文言素养是学生综合素质的重要组成部分,而庄典度的大小反映文言素养的高低。文章从语体语法视角探究文言素养,以中文专业学生的文言文作品为研究对象,在分词和词汇语体标注的基础上,统计不同语体词汇出现的频次和所占比重,按照比重大... 详细信息

文言素养是学生综合素质的重要组成部分,而庄典度的大小反映文言素养的高低。文章从语体语法视角探究文言素养,以中文专业学生的文言文作品为研究对象,在分词和词汇语体标注的基础上,统计不同语体词汇出现的频次和所占比重,按照比重大小排序为“通用语体词汇>庄典语体词汇>正式语体词汇>非正式语体词汇”,并在此基础上归纳当前中文专业学生文言素养特征,基于特征分析影响中文专业学生文言素养的因素,进而从需求、课程、学生、教师教学、考核等角度探究提升中文专业学生文言素养的策略。

关键词：语体文言素养庄典语体标注

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