4,756 research outputs found
A Profile of Fatherhood Among Young Men: Moving Away from Their Birth Family and Closer to Their Child.
No full textHave things changed all that much in terms of how fatherhood is conceptualized and exercised in daily life? That is the question underlying this article. The author compares the findings of a recent analysis on certain aspects of the lived experiences of young fathers (under 25 years of age) with the results of studies undertaken over the past ten years, and replies in the affirmative. First of all, when considering the representations held of fathers or mothers, most of these young fathers believe that their role is a multi-faceted one, and that it is often identical to that of their spouse. According to young fathers, fatherhood is a dual experience that requires them to be present on a daily basis while also casting their eye on the future. This is an experience that is constructed out of affectionate moments, child-care duties, education in the literal sense, and especially out of shared experiences with their spouse. In addition, they question the degree to which involvement in a career should take precedence over involvement in their child's life. In other words, the former 'competes' with their ability to be present in their child's daily life, which denotes a change from the attitudes of previous generations.Fatherhood, Young Fathers, Representation, Paternal Identity, Qualitative Research
Liu wang qu: ge, ge ju.
No full text江陵詞 ; 雪厂曲 ; 集體編劇雪厂, 葉瓊, 江凌.Music in number notation.Jiang Ling ci ; Xuechang qu ; ji ti bian ju Xuechang, Ye Qiong, Jiang Ling
Otimização de massas ceramicas Gres utilizando a metodologia Taguchi
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina. Centro TecnologicoA metodologia Taguchi permite garantir a robustez das funções do produto, agindo sobre os parâmetros que influenciam o processo de fabricação, levando-se em consideração suas condições de utilização; ou seja, o produto robusto assegura o melhor compromisso desempenho/custo de utilização, portanto um produto mais competitivo. Assim, o trabalho em questão tem o objetivo de aplicar a metodologia estatística de delineamento de experimentos, proposta por Genichi Taguchi, para o caso de otimização de massas cerâmicas grés para revestimentos visando a obtenção de um produto robusto. O método experimental utilizado está baseado no processo tradicional da indústria cerâmica. Passando-se pelas etapas de estocagem, moagem, atomização, prensagem, secagem e sinterização dos corpos de prova que irão avaliar as características finais do produto. A utilização da estatística de desempenho e da função-perda, determina os caminhos para a qualidade a baixo custo dos produtos acabados, definindo assim, as melhores misturas que geram a massa cerâmica robusta
A general physics-based hardening law for single phase metals
No full textA simple exponential strain hardening model (ESH) has been developed in the framework of the Kocks-Mecking-Estrin formalism with a new microstructure-based parameter that accounts for the effect of yield strength. The relevant parameters reflecting the effect of the composition (or dislocation annihilation distance) and the microstructure type (or strengthening technology) are comprehensively analyzed. The application scope of the model is then briefly discussed, and several significant advantages are enumerated including the clear derivation processes and the explicit physical meaning of the various parameters. Finally, the ESH model is verified extensively by systematic tensile tests on six groups of Cu-Al alloys having more than one hundred microstructural states. In addition, significant and quantitative revelations of strength and uniform elongation for ductile metals are elaborated in the following manuscript. The present ESH model is of significant theoretical value in providing a detailed understanding of the tensile performance of metallic materials.</p
Overtaking maneuvers on two-lane highways under the microscope: Exploration of a multidimensional framework for the analysis of safety, comfort and efficiency using simulator data
No full textAn unreasonable overtaking attempt on two-lane highways could cause drivers to suffer in terms of driving
safety, comfort, and efficiency. Several external factors related to the traffic environment (e.g., speed and car
type of surrounding vehicles), were found to be the significant factors in drivers’ overtaking performance in the
previous studies. However, the microscopic decision-making (e.g., the moments of the occupation of the opposite
lane) mechanisms during overtaking, by means of which drivers react to changes in the external traffic environment
and adjust their overtaking trajectories, are still need to be explored. Hence, this study had three goals:
(i) To explore the spatial characteristics of micro-decisions (MDs) (such as the start and end point) in overtaking
trajectories; (ii) To measure three types of performance indicators (i.e., safety, comfort, and efficiency) for the
execution of overtaking maneuvers; (iii) To quantitatively explain the microscopic decision-making mechanism
in overtaking. Data for overtaking trajectories were collected from driving a simulation experiment where 52
Chinese student drivers completed a series of overtaking maneuvers on a typical two-lane highway under
different traffic conditions. Two analyses were conducted: firstly, the distributions of the relative distance between
the ego and surrounding vehicles at four key points (i.e., the start, entry, back, and end) in the overtaking
trajectory were investigated and clustered to uncover the spatial characteristics of the MDs. Secondly, the safety,
comfort, and efficiency of the overtaking were measured by the aggregations of multi-targets collision risks,
triaxial acceleration variances, and spatial consumptions respectively based on the Data Envelopment Analysis
(DEA), which were further applied in a two-stage SEM model to reveal the quantitative interrelationships among
the external factors, microscope decisions and performances in overtaking. We confirmed that the MDs could be
considered as the mediating variables between the external factors and overtaking performances. In the presence
of the more hazardous traffic environment (e.g., faster traffic flow and impeded by a truck), the safety, comfort
and efficiency of overtaking would be deteriorated inevitably. But drivers would execute the overtaking under
the longer passing sight distance, migrate their trajectories forward, and shorten the spatial duration to significantly
improve the overtaking performances. Based on this mechanism, a overtaking trajectory optimization
strategy for the advanced or automatic driving system, was confirmed and concluded that 1) the passing gap
should be firstly planned according to the sight distance acceptance of different drivers, which directly determine
the upper limit of the safety performance in the overtaking; 2) the trajectory forward migration and shortening
the whole duration in overtaking could be effective to enhance the overtaking performances of the overtaking on
the two-lane highway; 3) the guidance of the stable control of the steering wheel and gas/brake pedals is
essential in the overtaking.This research was supported by the National Natural Science Foundation of China (Grant No.: 52002063), the Natural Science Foundation of Jiangsu Province of China (Grant No.: BK20190371), the Humanities and Social Sciences Foundation of the Ministry of Education of China (Grant No.21YJCZH129), and the Research Fund of Bilateral Scientific Cooperation of UHasselt (Grant No. BOF20BL16)
Relationship between strength and uniform elongation of metals based on an exponential hardening law
No full textAn exponential strain-hardening (ESH) model for single phase metals was established and well verified by systematic experiments on Cu-Al alloys in an earlier study. In this report, several additional significant revelations will be documented for the tensile behaviors of several typical metals. Firstly, a unified interpretation of the well-known five strain-hardening stages is developed by correlating the characteristics of each stage with the parameter n that relates to the dislocation annihilation behavior. Secondly, quantitative relationships among the yield strength (YS), ultimate tensile strength (UTS) and uniform elongation (UE) are established and verified using the tensile experimental results for Cu-Al alloys. Thirdly, the two general principles of the synchronous improvement of strength and uniform elongation (SISUE) effect, such as the composition adjustment and microstructure optimization, are quantitatively revealed by the composition parameter n and a microstructure type parameter η. Two typical trends of the true UTS-UE curves and two kinds of characteristic strengths are quantitatively revealed and confirmed by the relevant experimental data. Finally, a prediction model of tensile properties is proposed and a corresponding procedure is displayed, which is further verified by the tensile experimental results for Cu-Al alloys. These applications further support the validity and significance of the ESH model.</p
Fate and transport of urea-N in a rain-fed ridge-furrow crop system with plastic mulch
No full textA better understanding of the fate and transport of fertilizer nitrogen (N) is critical to maximize crop yields and minimize negative environmental impacts. Plastic film mulching is widely used in drylands to increase soil water
use efficiency and crop yields, but the effects on fertilizer N use efficiency need to be evaluated. A field experiment with 15N-urea (260 kg N ha−1) was conducted to determine the fate and transport of fertilizer N in a ridge-furrow system with plastic film mulched ridge (Plastic), compared with a flat system without mulching (Open). In the Plastic, the 15N-urea was applied to the ridge only (Plastic-Ridge), or to the furrow only (Plastic-Furrow). Maize grain yield and net economic benefit for Plastic were significantly higher (by 9.7 and 8.5%,respectively) than those for Open. Total plant 15N uptake was 72.5% greater in Plastic compared with Open, and 15N was allocated mostly to the grain. Losses of the applied urea-N were 54.5% lower in Plastic and much more
residual 15N was recovered in 0–120 cm soil compared with Open (42.7 and 26.8% of applied 15N, respectively).
Lateral N movements from furrow to ridge and from ridge to furrow were observed and attributed to lateral movement of soil water due to microtopography of ridges and furrows and uneven soil water and heat conditions under mulching and plant water uptake. The ridges were the main N fertilizer source for plant uptake (96.5 and 3.5% of total N uptake in Plastic from ridge and furrow, respectively) and the furrow was the main source of N losses (78.6 and 21.4% of total N losses in Plastic from furrow and ridge, respectively). Gas emissions, especially ammonia volatilization was probably the main N loss in furrow. Thus, appropriately localized N application – into the ridges, and management strategies should be designed for Plastic to maximize N use efficiency by crops, decrease N gas losses and maintain sustainable agricultural systems in drylands
Author reponse: Plant trans-golgi network/early endosome pH regulation requires Cation Chloride Cotransporter (CCC1)
No full textThis is the Author response to article:Plant trans-Golgi network/early endosome pH regulation requires cation chloride cotransporter (CCC1) found at DOI: 10.7554/eLife.70701.Abstract not availableDaniel W McKay, Heather E McFarlane, Yue Qu, Apriadi Situmorang,
Matthew Gilliham, Stefanie Weg
Author Correction: IRE1α-XBP1s pathway promotes prostate cancer by activating c-MYC signaling
No full textSheng X, Nenseth HZ, Qu S, et al. Author Correction: IRE1alpha-XBP1s pathway promotes prostate cancer by activating c-MYC signaling. Nature Communications . 2024;15(1): 6190
Wan Qing Minguo qu pu yan jiu =: A Study of qu notations in the late Qing and early Republican periods
No full textPh.D.During the late Qing and early Republican periods, writers of chuanqi, zaju and sanqu, the major subgenres of qu literature, failed to produce significant works. Kunqu Opera, the musical and theatrical representation of qu literature, gradually lost its audience to various local operas. However, the study of qu literature reached its peak during this period: large amounts of qu notations were produced; the theory of qu singing also flourished. As previous research mainly focused on the qu notations produced before the late Qing, my study will bridge this gap by bringing those later notations into light. As late Qing and early Republican qu notations as well as the theory of qu singing still have impact on today’s Kunqu Opera performance and singing, my study also seeks to highlight the significance of such historical documents in the contemporary context. In my dissertation, I concentrated on the analysis of the format, text, symbols as well as singing techniques of major qu notations produced during the late Qing and early Republican periods. Such analysis illustrates the diachronic evolution of notations. By considering the influence of different editors, social contexts and geographic regions, my research also explores the individual notation in a synchronic way. Furthermore, my study places emphasis on the text of notations by treating them as both literary and musical records. Through textual and musical analysis, I discuss how the notations influenced each other and reflected actual opera performance and singing.Apart from the Introduction and Conclusion, my dissertation consists of six chapters. Chapter Two depicts the evolution of qu notations produced before the late Qing, and points out that through uncovering two formats of notations, published works and manuscripts, the tradition of “xigong” (singing-and-acting artistry) came into existence long ago. Chapter Three discusses Wang Xichun and his Eryunge qupu. The publication of Eryunge qupu marked the rise of “xigong” in mainstream notations. Chapter Four analyzes the Liuye qupu series. These notations were based on the actor Yin Guishen’s manuscript and edited by Zhang Yusun, a literatus singer. Its wide circulation demonstrated the prominence of “xigong” and made immense impact on later Kunqu Opera performance and singing. Chapter Five scrutinizes Wang Jilie and his Jicheng qupu series. Wang promoted the tradition of “qinggong” (singing-versus-acting artistry) but failed. Chapter Six centers on Tianyu Kunqu Opera Club and Tianyunshe qupu. Particular emphasis is placed upon this Club based in Wuxi, which insisted on “qinggong” and the most traditional way of qu singing. Chapter Seven discusses Yu Sulu and Yu Zhenfei, who started with the tradition of “qinggong”. They accepted the influence of “xigong” to produce the Sulu qupu, and Zhenfei qupu. Zhenfei qupu used numbered musical notation, which demonstrates the decline of traditional qu study.晚清民國年間，傳奇、雜劇、散曲之創作已趨衰落，最能代表「曲」的舞臺劇種崑曲式微，皮黃等地方戲盛行。但晚清民國的「曲學」卻非一無是處，反而是曲譜刊印的高峰，曲譜中論及的曲唱理論也有極大的進展。然而以往的曲譜研究多著重於晚清以前，對晚清民國時期的曲譜研究還有許多探討的空間。同時，在與現實掛勾的意義上，晚清民國曲譜及其曲學理論，因仍在影響著現今的舞臺搬演及曲唱活動，也相當值得我們關注。本文選取晚清民國年間幾種具代表性的曲譜作為研究對象，以「清工」、「戲工」為核心觀念，對晚清民國曲譜的形製、曲文、曲譜標注、唱腔等內容進行分析；縱向探討曲譜的發展變化，橫向則結合曲譜輯訂者、社會時局、地域等因素，審視其對曲譜製作的影響，以求得到更全面的視野，展現晚清民國諸曲譜的差異。此外，本文也包含具體、詳盡的曲譜內部研究，兼顧曲譜文學層面及音樂層面的討論，分析不同年代的曲譜如何承上啟下，如何反映現實舞臺搬演及演唱等問題。除緒論及總結外，本文主體分作六章，第二章梳理晚清之前曲譜形製的變化，通過發掘大量抄譜材料，對晚清之前曲譜發展提出刊印譜與抄譜雙線發展的論述，指出「戲工」傳統早已存在。第三章論述王錫純及其《遏雲閣曲譜》，強調其雖然只是第一部刊印戲宮譜，但其刊印正式揭開「戲工」進駐曲譜主流的序幕。第四章討論以伶工殷溎深抄譜為底稿，經曲友張餘蓀輯訂的「六也系列」曲譜。這系列曲譜廣泛流傳，體現出「戲工」的進一步深化，並且直接影響其後崑曲舞臺的搬演和曲唱。第五章論述王季烈及其主持的《集成曲譜》系列，分析王季烈所代表的「清工」對曲譜中「文理曲律」的追求，勾勒他如何試圖以「清工」規範拯救傳統曲學，進而救世，但終告失敗的過程。第六章探討無錫天韻社及《天韻社曲譜》如何固守「清工」傳統，指出其乃遺世而獨立的另一脈曲學傳承。第七章論俞粟廬、俞振飛父子及《粟廬曲譜》與《振飛曲譜》，指出他們雖是「清工」出身，但已深受「戲工」影響，《粟廬曲譜》及《振飛曲譜》便是最好的例證。陳春苗.Parallel title from added title page.Thesis Ph.D. Chinese University of Hong Kong 2017.Includes bibliographical references (leaves 268-280).Abstracts in English and Chinese.Title from PDF title page (viewed on February 10, 2020).Chen Chunmiao
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