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An eighteen‑year longitudinal examination of school victimization and weapon use in California secondary schools

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World Journal of Pediatrics 2023年第11期19卷 1082-1093页

作者： Rami Benbenishty ron Avi Astor Ilan Roziner Hebrew University of Jerusalem JerusalemIsrael and Universidad Andrés BelloSantiagoChile Crump Chair in Social Welfare Luskin School of Public Affairs and School of Education and Information StudiesUniversity of CaliforniaLos AngelesLos AngelesCA 90095USA Sackler School of Medicine Department of Communication DisordersTel Aviv UniversityTel AvivIsrael

Background School safety has been a major public health issue in the United States and internationally for more than three *** policies and programs have been developed and implemented to prevent school violence,improve the school climate,and increase *** are only a few peer-reviewed studies of changes in school violence over *** study examined changes over time in school victimization,weapon involvement and school climate,comparing change trajectories by gender and race and different change trajectories among *** A longitudinal study of the biennial California Healthy Kids Survey in secondary schools from 2001 to *** representative sample included 6,219,166 students in grades 7,9,and 11(48.8%male)from 3253 schools(66%high schools).Results All victimization and weapon involvement items had significant and substantial linear *** largest reduction involved being in a physical fight(from 25.4%to 11.0%).There were reductions in weapon involvement(d=0.46)and victimization(d=0.38).Biased-based victimization only declined slightly(d=−0.05).School belongingness and safety increased(d=0.27),adult support increased a small amount(d=0.05),and student participation declined(d=−0.10).Changes were smallest among White ***-five percent of the schools showed the same pattern of *** The findings are in contrast to the public’s concerns that school violence is a growing *** in school violence may result from social investment in school safety.A distinction should be made between school shootings and other forms of school violence.

关键词： School violence School climate Weapons

Effect of controlled rolling on the martensitic hardenability of dual phase steel

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International Journal of Minerals,Metallurgy and Materials 2009年第2期16卷 165-169页

作者： Mohammad Ajmal Masood Ahmed Tindyala ron Priestner Department of Metallurgical & Materials Engineering University of Engineering & TechnologyG.T. Road Lahore-54890Pakistan Manchester Materials Science Center University of Manchester Institute of Science and Technology (UMIST)ManchesterM1 7HSUK

The C-Mn and C-Mn-Nb steels were thermo-mechanically processed to develop dual phase steel and to study the effect of controlled rolling on the martensitic hardenability of austenite. The steel specimens were intercritically annealed at 790℃, rolled at that temperature to the reductions of 10%, 23%, and 47% and immediately cooled at different rates. Quantitative metallography was used to construct the microstructure map, which illustrated that increasing deformation progressively reduced the proportion of new ferrite formed at all cooling rates and increased the amount of martensite at fast and intermediate rates. The martensitic hardenability of austenite remaining after all the rolling reductions was plotted as a function of cooling rates. It was observed that for the austenite-martensite conversion efficiencies greater than about 25%, controlled rolling increased the martensitic hardenability of austenite.

关键词： controlled rolling dual phase steel intercritical annealing hardenability phase transformation

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Kinetics of hydrogen peroxide quenching following UV/H_(2)O_(2)advanced oxidation by thiosulfate,bisulfite,and chlorine in drinking water treatment

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Frontiers of Environmental Science & Engineering 2023年第12期17卷 59-69页

作者： Tianyi Chen Lizbeth Taylor-Edmonds Susan Andrews ron Hofmann Department of Civil and Mineral Engineering University of TorontoTorontoOntario M5S 1A4Canada

Residual H_(2)O_(2)from UV/H_(2)O_(2)treatment can be quenched by thiosulfate,bisulfite,and chlorine,but the kinetics of these reactions have not been reported under the full range of practical *** this study,the rates of H_(2)O_(2)quenching by these compounds were compared in different water matrices,temperatures,pH,and when using different forms of bisulfite and *** general,it was confirmed that thiosulfate would be too slow to serve as a quenching agent in most practical *** pH 7-8.5,chlorine tends to quench H_(2)O_(2)more than 20 times faster than bisulfite in the various conditions *** important observation was that in lightly-buffered water(e.g.,alkalinity of 20 mg/L as CaCO_(3)),the form of chlorine can have a large impact on quenching rate,with gaseous chlorine slowing the reaction due to its lowering of the pH,and hypochlorite having the opposite *** impacts will become less significant when water buffer capacity(i.e.,alkalinity)increases(e.g.,to 80 mg/L as CaCO_(3)).In addition,water temperature should be considered as the time required to quench H_(2)O_(2)by chlorine at 4℃is up to 3 times longer than at 20℃.

关键词： UV/H_(2)O_(2) H_(2)O_(2) quenching Chlorine type Water alkalinity Temperature

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Incidence of brain metastasis in patients with esophageal carcinoma

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World Journal of Gastroenterology 2011年第19期17卷 2407-2410页

作者： ron S Smith Robert C Miller Department of Radiation Oncology Andreas Cancer Center-Mayo Health SystemMankatoMN 56002United States Department of Radiation Oncology Mayo ClinicRochesterMN 56002United States

AIM:To determine the incidence of brain metastasis in a contemporary group of patients with carcinoma of the ***:Retrospective analysis of 53 patients with esophageal carcinoma who received radiotherapy as a component of treatment between 1998 and 2007,including patient and tumor characteristics,and subsequent diagnosis of brain *** association between the histological type of esophageal cancer and the incidence of brain metastasis was assessed using Fisher's exact ***:Forty-four of the fifty-three patients in this study had adenocarcinoma and nine had squamous cell carcinoma,ranging from stage ⅡA-Ⅳ*** treatment was surgery with neoadjuvant chemoradiotherapy (trimodality therapy) in 19% of patients;chemoradiotherapy in 42%;and surgery and adjuvant radiotherapy in 7%.Twenty-five percent of patients inthis study received palliative *** overall incidence of brain metastasis in this cohort was 13%.Adenocarcinoma was the primary tumor histology in all of the patients who developed brain metastasis,representing an incidence of 16% in this *** patients with squamous cell carcinoma received trimodality *** association between histology and brain metastasis was not statistically ***:The incidence of brain metastasis in this contemporary cohort of patients with esophageal carcinoma is higher than previously reported and was confined to those with adenocarcinoma.

关键词： Brain metastasis Esophageal carcinoma

ALCHEMY-URBAN DWELLINGS ON DALLAS’KATY TRAIL

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Journal of Green Building 2011年第4期6卷 7-16页

作者： ron Wommack FAIA

INTRODUCTION This project began life as an aspiration of an individual client who is not a developer by *** is in the finance business,and in the course of buying some property for an investment,began studying how he might develop *** he embarked on a mission to examine some small multi-unit properties to learn about how they fared in the current Dallas market.

关键词： urban housing townhomes sustainable materials copper Milsap stone Ipe wood Katy Trail minimal maintenance natural light holistic design

Advanced paternal age and reproductive outcome

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Asian Journal of Andrology 2012年第1期14卷 69-76,176页

作者： Zofnat Wiener-Megnazi ron Auslender Martha Dirnfeld Fertility and iVF Unit Department of Obstetrics and Gynecology Carmel Medical Center the Bruce Rappaport Faculty of Medicine Technion Haifa 34362 Israel

Women have been increasingly delaying the start of motherhood in recent decades. The same trend is seen also for men. The influence of maternal age on fertility, chromosomal anomalies, pregnancy complications, and impaired perinatal and post-natal outcome of offspring, has been thoroughly investigated, and these aspectsare clinically applied during fertility and pregestational counseling. Male aging and reproductive outcome has gained relatively less attention. The purpose of this review is to evaluate updated and relevant literature on the effect of paternal age on reproductive outcome.

关键词： ART outcomes fertility male aging paternal age reproductive outcome

The China power grid: a network science perspective

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National Science Review 2014年第3期1卷 368-370页

作者： Guanrong(ron) Chen the Centre for Chaos and Complex Networks City University of Hong Kong

Power grid is a very large scale and highly non-linear dynamical system,and its stable and reliable operation poses a great challenge to scientists and *** a complex dynamic network has a tendency of catastrophic failure,sophisticated analysis and control are *** an interview with NSR,Professor Yusheng Xue,member of the Chinese Academy of Engineering,Honorary President of China’s State Grid Electric Power Research Institute,talked about the economic impact,technical challenges,and future development of power grid in China.

关键词： a network science perspective The China power grid than

Weighted De-Synchronization Based Resource Allocation in Wireless Networks

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Computers, Materials & Continua 2023年第4期75卷 1815-1826页

作者： Kimchheang Chhea Dara ron Jung-Ryun Lee School of Electronics and Electrical Engineering(EEE)at Chung-Ang University Seoul156-756Korea Department of Intelligent Energy and Industry Chung-Ang UniversitySeoul156-756Korea

Considering the exponential growth of wireless devices with datastarving applications fused with artificial intelligence,the significance of wireless network scalability using distributed behavior and fairness among users is a crucial feature in guaranteeing reliable service to numerous users in the network *** model is described as nonlinear selfsustained phase oscillators spinning at varying intrinsic frequencies connected through the sine of their phase differences and displays a phase transition at a specific coupling strength,in which a mutual behavior is *** this work,we apply the Kuramoto model to achieve a weighted fair resource allocation in a wireless network,where each user has different quality of service(QoS)*** the original Kuramoto model is the synchronization model,we propose a new weighting parameter for representing requirement of each node resource and modify the Kuramoto model to achieveweighted fair resource allocation for users with different QoS *** proposed modified Kuramoto model allocates all users the resource based on their weight among contending nodes in a distributed *** analyze the convergence condition for the proposed model,and the results reveal that the proposed algorithm achieves aweighted fair resource allocation and with potentially high convergence speed compared to previous algorithm.

关键词： Kuramoto model fair resource allocation weighted de-synchronization

GPU based techniques for deep image merging

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Computational Visual Media 2018年第3期4卷 277-285页

作者： Jesse Archer Geoff Leach ron van Schyndel School of Science RMIT University

Deep images store multiple fragments perpixel,each of which includes colour and depth,unlike traditional 2D flat images which store only a single colour value and possibly a depth ***,deep images have found use in an increasing number of applications,including ones using transparency and compositing.A step in compositing deep images requires merging per-pixel fragment lists in depth order;little work has so far been presented on fast *** paper explores GPU based merging of deep images using different memory layouts for fragment lists:linked lists,linearised arrays,and interleaved *** also report performance improvements using techniques which leverage GPU memory hierarchy by processing blocks of fragment data using fast registers,following similar techniques used to improve performance of transparency *** report results for compositing from two deep images or saving the resulting deep image before compositing,as well as for an iterated pairwise merge of multiple deep *** results show a 2 to 6 fold improvement by combining efficient memory layout with fast register based merging.

关键词： deep image composite GPU performance

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