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The Effects of Short-Term Resistance Training and Subsequent Detraining on Neuromuscular Function,Muscle Cross-Sectional Area,and Lean Mass

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Journal of Science in Sport and Exercise 2022年第3期4卷 237-254页

作者： Pablo B.Costa Trent J.herda ashley a.herda Joel T.Cramer Exercise Physiology Laboratory Department of KinesiologyCalifornia State UniversityFullerton800 N.State College Blvd.FullertonCA 92831USA Department of Health Sportand Exercise SciencesUniversity of KansasLawrenceKSUSA College of Health Sciences University of Texas at El PasoEl PasoTXUSA

Purpose To examine and compare the effects of three days of dynamic constant external resistance(DCER)and isokinetic(ISOK)training and subsequent detraining on thigh muscle cross-sectional area(TMCSA)and thigh lean mass(TLM),ISOK peak torque(PT),DCER strength,isometric force,muscle activation,and percent voluntary activation(%VA).Methods Thirty-one apparently-healthy untrained men(mean±SD age=22.2±4.2 years;body mass=77.9±12.9 kg;height=173.9±5.4 cm)were randomly assigned to a DCER training group(n=11),ISOK training group(n=10)or control(CONT)group(n=10).Subjects visited the laboratory eight *** first visit was a familiarization session,the second visit was a pre-training assessment,the subsequent three visits were for unilateral training of the quadriceps(if assigned to a training group),and the last three visits were the post-training assessments conducted at three days,one week,and two weeks after training *** DCER strength increased from pre-to post-training assessment 1 in both limbs for the DCER group only,and remained elevated during post-training assessments 2 and 3(P<0.05).In addition,surface EMG for the biceps femoris was higher at post-training assessment 3 than at the pre-training assessment,and post-training assessments 1 and 2(P<0.05).No other training-related changes were *** The primary finding of this study was that DCER strength of the trained and untrained limbs can be increased with three days of *** has important implications for injury rehabilitation,where in the initial period post-injury strength gains on an injured limb can possibly be obtained with short-term contralateral resistance training.

关键词： Twitch interpolation Electromyography Muscle activation Strength training Injury rehabilitation

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Repellent effects of pongam oil on settlement and oviposition of the common greenhouse whitefly Trialeurodes vaporariorum on chrysanthemum

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Insect Science 2007年第3期14卷 219-224页

作者： ROMAN PAVELA GERHARD herda Research Institute of Crop Production Prague Czech University of Agriculture Prague Czech Republic

The repellent activities, including host deterrence and anti-oviposion, of pongam oil against the adults of the common greenhouse whitefly Trialeurodes vaporariorum Westwood in greenhouses were tested. Chrysanthemum plants treated with different concentrations （0.5%-2.0%） of water-suspended pongam oil showed relatively long-lasting host deterrent and anti-oviposition effects on the adults of greenhouse whitefly. Although the repellent effect declined in time and concentration, strong effects on the reduction of oviposition were found, which lasts, dependent on concentration at least 12 days after application.

关键词： botanical insect control agent oviposition pongam oil repellence Trialeurodes vaporariorum

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Laboratory Evaluation of Fiber-Modified Asphalt Mixtures Incorporating Steel Slag Aggregates

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Computers, Materials & Continua 2022年第3期70卷 5967-5990页

作者： Adham Mohammed Alnadish Mohamad Yusri Aman herda Yati Binti Katman Mohd Rasdan Ibrahim Department of Civil Engineering and Built Environment Universiti Tun Hussein Onn MalaysiaParit Raja86400Malaysia Department of Civil Engineering Universiti Tenaga NasionalKajang43000Malaysia Department of Civil Engineering Universiti MalayaKuala Lumpur50603Malaysia

Vigorous and continued efforts by researchers and engineers have contributed towards maintaining environmental sustainability through the utilization of waste materials in civil engineering applications as an alternative to natural *** this study,granite aggregates in asphaltic mixes were replaced by electric arc furnace(EAF)steel slag aggregates with different proportions to identify the best combination in terms of superior *** mixtures showing the best performance were further reinforced with polyvinyl alcohol(PVA),acrylic,and polyester fibers at the dosages of 0.05%,0.15%,and 0.3%by weight of the *** performance tests of this study were resilient modulus,moisture susceptibility,and indirect tensile fatigue cracking *** findings of this study revealed that the asphalt mixtures containing coarse steel slag aggregate exhibited the best performance in comparison with the other ***,the reinforced asphalt mixtures with synthetic fibers at the content of 0.05%exhibited an almost comparable performance to the unreinforced asphalt *** the asphalt mixtures with PVA,acrylic,and polyester fibers at the proportion of 0.15%have improved the fatigue cracking resistance by 41.13%,29.87%,and 18.97%,***,the fiber-modified asphalt mixtures with PVA,acrylic,and polyester have enhanced the fatigue cracking resistance by about 57%,44%,and 39%,*** results of the resilient modulus demonstrated that as the fiber content increase,the resilient modulus of the reinforced asphalt mixtures ***,introducing synthetic fibers at the content of 0.3%has slightly decreased the resilient modulus in comparison with unreinforced *** the other hand,the results of the mechanisticempirical pavement design showed that the reinforced asphalt mixes with a high content of synthetic fibers have shown lower service life than the control mixes due to the low resilient *** the contra

关键词： Steel slag aggregate polyvinyl alcohol fiber acrylic fiber polyester fiber cracking resistance resilient modulus

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Chronic training status affects muscle excitation of the vastus lateralis during repeated contractions

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运动医学与健康科学(英文) 2023年第1期5卷 42-49页

作者： Sunggun Jeon Stephanie A.Sontag Trent J.herda Michael A.Trevino Applied Neuromuscular Physiology Laboratory Department of KinesiologyApplied Healthand RecreationOklahoma State UniversityStillwaterOKUSA Neuromechanics Laboratory Department of HealthSportand Exercise SciencesThe University of KansasLawrenceKSUSA

This study examined electromyographic amplitude(EMGRMS)-force relationships during repeated submaximal knee extensor muscle actions among chronic aerobically-(AT),resistance-trained(RT),and sedentary(SED)*** adults(5/group)attempted 20 isometric trapezoidal muscle actions at 50%of maximal *** electromyography(EMG)was recorded from vastus lateralis(VL)during the muscle *** the first and last successfully completed contractions,linear regression models were fit to the log-transformed EMGRMS-force relationships during the linearly increasing and decreasing segments,and the b terms(slope)and a terms(antilog of y-intercept)were *** was averaged during steady *** the AT completed all 20 muscle *** the first contraction,the b terms for RT(1.3010.197)were greater than AT(0.9100.123;p?0.008)and SED(0.9120.162;p?0.008)during the linearly increasing segment,and in comparison to the linearly decreasing segment(1.0180.139;p?0.014),*** the last contraction,the b terms for RT were greater than AT during the linearly increasing(RT?1.3730.353;AT?0.8830.129;p?0.018)and decreasing(RT?1.5260.328;AT?0.9700.223;p?0.010)*** addition,the b terms for SED increased from the linearly increasing(0.9680.144)to decreasing segment(1.2680.126;p?0.015).There were no training,segment,or contraction differences for the a *** during steady force increased from the first-([64.0851.68]μV)to last-contraction([86.7349.55]μV;p?0.001)collapsed across training *** b terms differentiated the rate of change for EMGRMS with increments in force among training groups,indicating greater muscle excitation to the motoneuron pool was necessary for the RT than AT during the linearly increasing and decreasing segments of a repetitive task.

关键词： Electromyography Fatigue Isometric trapezoidal muscle action Motor unit control properties Natural log-transformed model Vastus lateralis

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Relative Feed Value of Different Varieties of Dactylis glomerata and Festuca pratensis

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Journal of Life Sciences 2015年第9期9卷 443-448页

作者： Sosnowski Jacek Jankowski Kazimierz Domafiski Piotr herda Dorota Krol Justyna Matsyura Alex Siedlce University of Natural Sciences and Humanities Faculty of Natural Science Institute of Agronomy Siedlce 08-11 0 Poland Research Centre for Cultivar Testing Stupia Wielka 63-022 Poland Altai State University Biology Faculty Lenin Av. 61 Barnaul 656049 Russia

The aim of this paper is to analyze fluctuation in nutritional value of Dactylis glomerata and Festuca pratensis varieties grown on mineral and organic soil. Moreover, the paper deals with analysis of their nutritional value in terms of animal feeding. This paper has drawn on two field experiments set up and carried out between 2010 and 2013 by the Research Centre for Cultivar Testing in Slupia Wielka. The experiment was conducted in two experimental stations： one in the Research Centre for Cultivar Testing in Krzyzewo and the other in the Experimental Stations for Variety Testing in Uhinin, being a branch of the Research Centre for Cultivar Testing in Cicibor Duzy. The experiment was arranged and conducted according to COBORU guidelines. The experimental plots were sown with varieties of Dactylis glornerata： Niva, Tukan, Amila, Crown Royale and with varieties of Festuca pratensis： Limosa, Pasja, Anturka, Amelka （d. AND 1009）. In the experimental plots with the varieties of Dactylis glornerata the grass was harvested six times a year and chemical analysis of the biomass was done taking dry matter only from five cuts. The varieties of Festuca pratensis were harvested four times. The RFV （relative feed value） was determined using the Linn and Martin method. Linn and Martin＇s test proved that Festuca pratensis had better nutritional value than Dactylis glomerata. For Dactylis glomerata, no matter what the variety and location was, the relative feed value ranged from 125 to 151, which puts that grass species in II quality class, good enough to feed high production dairy cows and heirs selected for replacements. The analysis of the relative feed value proved that no matter from which cut, the biomass ofDactylis glornerata belonged in Ill quality class, （RFV between 103 and 124） and it can be used to feed good beef cattle, older heifers and, in small quantities, dairy cows.

关键词： Dry matter intake dry matter digestability relative feed value.

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TeleTrusT技术背景

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信息安全与通信保密 1992年第3期14卷 10-12,16页

作者： SIGFRIED herda 关义章

1 基本机理基于非对称密码体制的数字签名将作为基本机制。某些具有秘密密钥产生签名,公开密钥核实签名特征的签名方案可很方便地用来建立分级证明体系。体系中不同等级的证明机构都要发给更低一级实体一个证书,它是通过用它的秘密密钥... 详细信息

1 基本机理基于非对称密码体制的数字签名将作为基本机制。某些具有秘密密钥产生签名,公开密钥核实签名特征的签名方案可很方便地用来建立分级证明体系。体系中不同等级的证明机构都要发给更低一级实体一个证书,它是通过用它的秘密密钥对更低一级的实体的公开密钥和其它信息一起进行签名来实现的。从而建立起一条不可破的可信链。

关键词：秘密密钥公开密钥非对称密码数字签名签名者 TeleTrusT 散列函数基本机理目录服务密码强度

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生态堡垒:协助瑞士阿尔卑斯山脉中部地区敏感植物的迁移

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景观设计学（中英文） 2022年第2期10卷 82-89页

作者：斯蒂芬·赫尔达加拿大多伦多大学约翰·H·丹尼尔斯建筑、景观与设计学院多伦多M5S 2J5

气候变化对瑞士的高山生态造成的影响是极为特殊的。由于年平均气温不断上升,当地许多植物物种的栖息地遭到破坏,它们被迫逐渐向海拔更高的区域迁移。在旅游经济开发和先锋植物物种不断入侵的双重影响下,敏感而稀有的植物群落将无力适... 详细信息

气候变化对瑞士的高山生态造成的影响是极为特殊的。由于年平均气温不断上升,当地许多植物物种的栖息地遭到破坏,它们被迫逐渐向海拔更高的区域迁移。在旅游经济开发和先锋植物物种不断入侵的双重影响下,敏感而稀有的植物群落将无力适应新的环境,以致当地具有重要价值的高山草甸日渐衰败。生物多样性丧失正迅速成为瑞士举国关注的重要生态问题。安德马特镇位于瑞士中部乌塞伦河谷的东端,地处欧伯拉普、圣哥达山和富尔卡三个隘口的交汇处,拥有丰富的植物物种。周边的山脉上坐落着若干“国家堡垒防御计划”时期遗留下来的军事掩体和堡垒,其中包括建于1893年的斯托克利堡垒和建于1944年的古奇炮工厂。20世纪90年代,随着冷战的结束,逾8 000座防御工事逐渐丧失功能,其中一部分与当地景观融为一体。与此同时,精品酒店的大量开发、为建设高山滑雪公园而进行的斜坡改造等对当地的高山草甸造成了严重威胁。如不加以干预,该地区特色植物的生存空间将持续萎缩,加剧生物多样性缺失与土壤质量下降。本文所述项目探究了如何将特定军事基础设施融入景观中,进而推动高山植物群落的研究、保护与复育。具体策略包括:1)重新引入传统的放牧管理方式,控制桤木的入侵;2)以斯托克利堡垒和古奇炮工厂为基地,建立高海拔种子库;3)将古奇炮工厂上方崎岖不平的景观改造为一处生态庭院,促进植物的主动与被动繁殖。考虑到部分高山植物生长于海拔较低的区域,本项目设计了一套新的种子主动传播机制,该机制与种子的天然传播途径相结合,充分利用焚风,可大大增加种子的传播距离,适应不断变化的气候条件。废弃的防御工事由此重获新生,成为了集生产、研究与教育功能为一体的重要场所。

关键词：高山生物多样性瑞士军事基础设施气候变化适应性再利用种子传播

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语言、对话与想象:辩证诠释学的应用

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安徽师范大学学报（社会科学版） 2008年第3期36卷 284-288页

作者：艾伦·赫达美国旧金山大学教育学院 San Francisco CA94118

保罗·利科倡导的叙述的变革力量通过语言、对话和想象被极大地扩展了,尤其在一群西方的发展者和泰国北部的马来布族人之间。持续的对话和对社会全景的展望给新的生活方式带来了充分的想象空间,对我们生活的热情叙述和学习也给建立新的... 详细信息

保罗·利科倡导的叙述的变革力量通过语言、对话和想象被极大地扩展了,尤其在一群西方的发展者和泰国北部的马来布族人之间。持续的对话和对社会全景的展望给新的生活方式带来了充分的想象空间,对我们生活的热情叙述和学习也给建立新的关系网络带来了可能,并成为可持续性国际发展的基石。这里讨论的以批判诠释学为基础的方法尝试区别于传统的市场经济论,希望能给社会的发展以指导性的启示。

关键词：叙述一致性国际发展利科社会全景

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基于美国放射学院(ACR)BI-RADS词汇并用于乳腺摄影肿块病变,建立一个在线的、可公开访问的朴素贝叶斯决策支持工具

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国际医学放射学杂志 2015年第4期 406-406页

作者： M.Benndorf E.Kotter M.Langer C.herda Y.Wu E.S.Burnside 孙超 Department of Radiology University Hospital Freiburg Hugstetter Straβe 55 79106 FreiburgGermany

摘要目的发展并验证基于标准描述术语(BI-RADS词汇)的乳腺摄影肿块病变的决策支持工具,以减少实践误差。材料与方法使用独立的训练数据(1 276个病变,138个为

关键词：乳腺摄影肿块病病变 ACR)BI-RADS 描述符决策支持工具 BI 词汇贝叶斯

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