performance

摘要： The purpose of this study is to determine if there is a correlation between grades and playing an instrument.Furthermore,it will be determined if the number of hours one spends practicing their instrument and how long one has played their instrument affects one’s grade in a class.The data for this study were obtained through a Google Form and were targeted towards middle and high school students in the United States.Results of this study concluded that there is a correlation between playing an instrument and one’s grades in certain subjects.It was also determined that the amount of time spent practicing or how long one has played an instrument also had an impact on one’s grades in certain subjects.

摘要： With the rapid development of information technology,the cyberspace security problem is increasingly serious.Kinds of dynamic defense technology have emerged such as moving target defense and mimic defense.This paper aims to describe the architecture and analyze the performance of Cyberspace Mimic DNS based on generalized stochastic Petri net.We propose a general method of anti-attacking analysis.For general attack and special attack model,the available probability,escaped probability and nonspecial awareness probability are adopted to quantitatively analyze the system performance.And we expand the GSPN model to adjust to engineering practice by specifying randomness of different output vectors.The result shows that the proposed method is effective,and Mimic system has high anti-attacking performance.To deal with the special attack,we can integrate the traditional defense mechanism in engineering practice.Besides,we analyze the performance of mimic DNSframework based on multi-ruling proxy and input-output desperation,the results represent we can use multi ruling or high-speed cache servers to achieve the consistent cost of delay,throughput compared with single authorized DNS,it can effectively solve 10%to 20%performance loss caused by general ruling proxy.

摘要： The development of low-bandgap nonfullerene acceptors and wide-bandgap polymer donors speeds up the advance of organic solar cells(OSCs)[1-17]. Wide-bandgap copolymers based on fused-ring acceptor units are ideal donor materials due to their low-lying HOMO levels, high hole mobilities and complementary light absorption to nonfullerene acceptors[18-25]. Currently, high-performance donors with 18%power conversion efficiencies(PCEs) belong to this type.

摘要： Objectives: Dengue virus (DENV) infection is a mosquito-borne disease that stands out as one of the major public health issues and has a wide-ranging geographical distribution throughout the tropics and subtropics. The general alarming increase in the number of cases over the last two decades can be attributed to an extent by the change in national practices to keeping records and reporting dengue to the Ministries of Health, and WHO. Dengue diagnosis is routinely carried out by detection of dengue virus (DENV) antigen NS1 (Non-structural Antigen 1) and/or anti-DENV IgM/IgG antibodies using enzyme-linked immunosorbent assays (ELISAs) and rapid diagnostic tests (RDTs). This study compared the performance of three RDTs and one ELISA used for dengue diagnosis in southeastern, Nigeria. Design: This study adopted a cross-sectional design that included prospective hospital-based surveillance of cases among febrile participants attending two major health facilities within the southeastern region of Nigeria. In this study, 338 HIV-infected participants from two teaching hospitals in Nigeria’s southeast were systematically tested for Dengue with four methods: NS1 RDT, IgG RDT, IgM RDT, and NS1 ELISA. Their specificities and sensitivities were compared, as well as their level of concordance. Their respective performances were also evaluated using the Receivers Operational curve (ROC). Results: Out of the 338 patients, the dengue prevalence from the four dengue diagnostic methods Dengue virus NS1 ELISA, NS1 RDT, IgM and IgG seropositivity were 8.9%, 0.6%, 5.6%, and 8.0%, respectively. The Dengue IgM RDT test indicated 36.8% sensitivity, 92.8% specificity, the IgG anti-dengue specific test indicated 29.6% sensitivity, 92.9% specificity and the dengue NS1 RDT test indicated 3.3% sensitivity, 99.4% specificity when compared with the Dengue NSI Elisa test method as a reference method. Conclusion: The use of NSI ELISA for DENV diagnosis showed good performance and the RDTs showed, to an extent, reliable results compared with ELISA. However, diagnostic laboratories should be aware of performance variations across tests and the possibilities of cross-reactivity that may affect results.

摘要： Background:Previous studies had shown that short-term acute heat stress(HS)affected the host’s metabolism and intestinal microbiota independent of feed intake(FI)reduction,and long-term calorie restriction caused intestinal morphological injuries and gut microbial alterations.However,research on the effects of constant chronic HS on intestinal microbial composition and the roles of FI reduction played in is limited.This study aimed to investigate the effects of 7-day constant chronic HS on the composition of intestinal microbes in growing-finishing pigs,and its relationship with pigs’performance,intestinal morphology,and ileal immune response.Twenty-four growingfinishing pigs(Duroc×Large White×Landrace,30±1 kg body weight)were randomly assigned to three treatments(n=8),1)thermal neutral(TN)conditions(25±1°C)with ad libitum FI,2)HS conditions(35±1°C)with ad libitum FI,3)pair-fed(PF)with HS under TN conditions to discriminate the confounding effects of dissimilar FI,and the FI was the previous day’s average FI of HS.The small intestinal segments(duodenum,jejunum,and ileum)and feces were collected on d 8.Results:Results indicated that HS drastically declined(P<0.05)average daily gain(ADG)and average daily feed intake(ADFI)(about 61%)in comparison with TN,and caused hyperpyrexia,meanwhile PF caused hypothermia.Morphological observation by light and electron microscopes showed that both HS and PF treatment decreased(P<0.05)the villus and microvillus height compared with TN.Additionally,HS increased(P<0.05)protein expression of heat shock protein 70 in the duodenum,jejunum,and ileum.Furthermore,the expression of tight junction protein zonula occluden-1(ZO-1)in the duodenum and ileum,and Occludin in the ileum were enhanced(P<0.05)compared with TN and PF.Moreover,HS significantly enhanced(P<0.05)the mRNA relative expression of inflammatory cytokines(TLR-2,TLR-4,and tumor necrosis factor-α(TNF-α),IL-6,IL-8,PG1–5,β-defensin 2(pBD-2)),mucins(mucin-1 and mucin-2)and P65 protein level in the ileal mucosa tissue.Intestinal microbiota analysis by 16S rRNA sequencing showed lower(P<0.10)αdiversity in both HS and PF,and a separated cluster ofβdiversity among groups.Compared with TN,HS but not PF mainly reduced(FDR<0.05)Bacteroidetes(phylum),Bacteroidia(class)and elevated the proportions of Proteobacteria(phylum,FDR<0.05),Bacillales(order,FDR<0.05),Planococcaceae(family,FDR<0.05),Kurthia(genus,FDR<0.05),Streptococcaceae(family,FDR<0.10)and Streptococcus(genus,FDR<0.10).Notably,Lactobacillales(order)was decreased(FDR<0.05)by PF alone.Furthermore,the Spearman correlation analysis indicated that the microbes prevalent in HS were positively(P<0.05)associated with intestinal morphological injuries indicators and ileal immune response parameters,and the microbes reduced in HS were negatively(P<0.05)with the performance data.Conclusions:Intestinal morphological injuries and ileal immune response caused by constant chronic HS independent of FI showed close connections with alterations in intestinal microbiota in growing-finishing pigs.

摘要： In the evening of January 19,2022,PIEN TZE HUANG published its performance result in 2021.It was disclosed that the annual total revenue of PIEN TZE HUANG reached 8.026 billion yuan,an increase of 23.27% year-on-year;the net profit belonging to the listed company shareholders stood at 2.433 billion yuan,up by 45.55% against the last year;the basic earnings per share was 4.03 yuan while the basic earnings per share one year before remained 2.77 yuan.

摘要： The Big Five Theory is considered as the most prominent personality theoretical approach in psychology.This paper aims to discuss the contribution of the Big Five Theory in the modern workplace.Which personality traits are more predictive for job performance?Which traits should organizations take more in consideration during recruitment and selection processes?What is the meaning of motivation in the workplace and how employers could locate individuals who can be more productive,efficient,and engaged to the organization’s goals according to the Big Five personality model?The above questions are answered through the systematic review of previous contemporary studies.After the collection and review of several recent publications,regarding this subject,it was concluded that the application of this model positively affects employees’and group performance,working relationships,managers’work performance as well as innovation in workplace.

摘要： Purpose This study aimed to investigate if changing the midsole bending stiffness of athletic footwear can affect the onset of lower limb joint work redistribution during a prolonged run.Methods Fifteen trained male runners(10-km time of<44 min)performed 10-km runs at 90%of their individual speed at lactate threshold(i.e.,when change in lactate exceeded 1 mmol/L during an incremental running test)in a control and stiff shoe condition on 2 occasions.Lower limb joint kinematics and kinetics were measured using a motion capture system and a force-instrumented treadmill.Data were acquired every 500 m.Results Prolonged running resulted in a redistribution of positive joint work from distal to proximal joints in both shoe conditions.Compared to the beginning of the run,less positive work was performed at the ankle(approximately 9%;p≤0.001)and more positive work was performed at the knee joint(approximately 17%;p≤0.001)at the end of the run.When running in the stiff shoe condition,the onset of joint work redistribution at the ankle and knee joints occurred at a later point during the run.Conclusion A delayed onset of joint work redistribution in the stiff condition may result in less activated muscle volume,because ankle plantar flexor muscles have shorter muscles fascicles and smaller cross-sectional areas compared to knee extensor muscles.Less active muscle volume could be related to previously reported decreases in metabolic cost when running in stiff footwear.These results contribute to the notion that footwear with increased stiffness likely results in reductions in metabolic cost by delaying joint work redistribution from distal to proximal joints.

摘要： Purpose This study aimed to determine the independent effect of the curved carbon-fiber plate in the Nike Vaporfly 4%shoe on running economy and running biomechanics.Methods Fifteen healthy male runners completed a metabolic protocol and a biomechanics protocol.In both protocols participants wore 2 different shoes,an intact Nike Vaporfly 4%(VF_(intact))and a cut Nike Vaporfly 4%(VF_(cut)).The VF_(cut) had 6 medio-lateral cuts through the carbon-fiber plate in the forefoot to reduce the effectiveness of the plate.In the metabolic protocol,participants ran at 14 km/h for 5 min,twice with each shoe,on a force-measuring treadmill while we measured metabolic rate.In the biomechanics protocol,participants ran across a runway with embedded force plates at 14 km/h.We calculated running economy,kinetics,and lower limb joint mechanics.Results Running economy did not significantly differ between shoe conditions(on average,0.55%±1.77%(mean±SD))worse in the VF_(cut) compared to the VF_(intact);95%confidence interval(-1.44%to 0.40%).Biomechanical differences were only found in the metatarsophalangeal(MTP)joint with increased MTP dorsiflexion angle,angular velocity,and negative power in the VF_(cut).Contact time was 1%longer in the VF_(intact).Conclusion Cutting the carbon-fiber plate and reducing the longitudinal bending stiffness did not have a significant effect on the energy savings in the Nike Vaporfly 4%.This suggests that the plate's stiffening effect on the MTP joint plays a limited role in the reported energy savings,and instead savings are likely from a combination and interaction of the foam,geometry,and plate.

摘要： Background:Soccer match-play is typically contested over 90 min;however,in some cup and tournament scenarios,when matches are tied,they proceed to an additional 30 min,which is termed "extra-time^(ET).This systematic review sought to appraise the literature available on 120-min of soccer-specific exercise,with a view to identifying practical recommendations and future research opportunities.Methods:The review was conducted according to the PRISMA guidelines.Independent researchers performed a systematic search of PubMed,CINAHL,and PsycINFO in May 2019,with the following keywords entered in various combinations:"soccer","football","extra-time","extra time","extratime","120 minutes","120 min","additional 30 minutes",and "additional 30 min".Results:The search yielded an initial 73 articles.Following the screening process,11 articles were accepted for analyses.Articles were subsequently organized into the following 5 categories:movement demands of ET,performance responses to ET,physiological and neuromuscular response during ET,nutritional interventions,and recovery and ET.The results highlighted that during competitive match-play,players cover5%-12% less distance relative to match duration(i.e.,meters per minute) during ET compared to the preceding 90 min.Reductions in technical performance(i.e.,shot speed,number of passes and dribbles) were also observed during ET.Additionally,carbohydrate provision may attenuate and improve dribbling performance during ET.Moreover,objective and subjective measures of recovery may be further compromised following ET when compared to 90 min.Conclusion:Additional investigations are warranted to further substantiate these findings and identify interventions to improve performance during ET.

摘要： A series of poly-aluminum-chloride-sulfate(PACS) coagulants,which have different SO42-/Al3+ and OH/Al(γ) mole ratio,has been successfully developed using AlCl3·6H2O,Al2(SO4)3·18H2O andNa2CO3 as raw materials.The coagulation performance of PACS for removing natural organic matter (NOM) from actual surface water has been evaluated.The effect of SO42-/Al3+ mole ratio and γ value in coagulants PACS on DOC and UV254 removal was examined.And the influence of pH and dosages of selected PACS with SO42-/Al3+ ratio of 0.0664 and γ value of 2.0,which achieved the best coagulation performance forremoval of DOC and UV254 than other coagulants PACS,on the removal of DOC and UV254 and residual aluminum concentration in treated water was also examined in comparison with polyaluminum chloride (PAC) with γ value of 2.0.The experimental results show that the performance of PACS as a coagulant was highly dependent on SO42-/Al3+ mole ratio and γ value.Both for the selected PACS and for PAC,the best DOC andUV254 removal results were obtained in the range of pH from 5.0 to 8.2 and at the coagulation dose of 5.0mg/L as Al.Under the optimum coagulation conditions,the selected PACS gave higher DOC and UV254removal efficiency,and lower residual aluminum concentration in the treated water than PAC.The maximumremoval of DOC and UV254 for PACS was approximately 88.0 % and 93.0 %,respectively.At the optimumcoagulant dose and pH 6.5,the concentration of residual aluminum in treated water by both selected PACSand PAC can comply with the regulated limits.The major mechanisms of NOM removal by PACS and PACcoagulation involve complexation-charge-neutralization-precipitation.

摘要： 本发明公开了一种基于互联网的Performance绩效管理系统，属于绩效管理系统技术领域，包括现场应用层、数据传输层、数据分析层和管理决策层。本发明优化现有的生产绩效管理方式，提升工厂的运作效率，通过对工件产出数据的实时自动采集来感知生产现场的实时状态，同时根据智能化算法，对采集的数据进行自动分析、处理，并将绩效结果按照生产管理各项指标，通过电子看板、PC端以及移动终端进行可视化公示，系统能够串联各个生产环节之间的沟通，消除信息孤岛问题。

摘要： 本发明公开了一种用于Sony Xperia X Performance手机的3D钢化保护膜，包括钢化膜，所述的钢化膜内部为透明视窗区域，钢化膜内部上下两端以及两侧为油墨印刷区域，油墨印刷为印刷二层油墨。钢化膜颜色分为黑色以及白色两种颜色效果。钢化膜内部四周边缘为向内弯曲的3D面，钢化膜的印刷区域通过可移胶贴合在手机相应位置，透明视窗区域通过防爆膜贴合在手机视窗区域。钢化膜表面做防指纹效果处理。所述的钢化膜采用0.33mm旭硝子玻璃或0.4mm康宁玻璃作为原料加工而成，所述的可移胶采用0.175mm厚度的3M200MP可移胶。所述的防爆膜采用0.075mm厚度的PA42N防爆膜。所述的钢化膜防指纹效果是采用真空电镀防指纹膜处理。本发明具有结构简单、设计合理、使用方便、使用效果好和易于推广使用等优点。