In online communities, such as Twitter, Facebook, or Reddit, millions of pieces of contents are generated by users every day, and these user-generated contents show a great variety of topics discussed that make the online community vivid and attractive. However, the reasons why UGCs show great variety and how a firm can influence this variety was unknown, which had been an obstacle to understanding and managing UGCs’ variety. This study fills these two gaps based on variety-seeking theory and topic modeling, (...) which is a technique in machine learning. We extract, quantitatively, the topic of the UGCs using topic modeling and divide UGCs into two types: single topic and multiple topics. The user’s tendency to choose the type of UGC is used to measure variety-seeking behavior. We found that users have an intrinsic preference for variety when producing UGCs; the more single topic UGCs were produced in the past, the higher the probability of producing multiple topics UGC and the lower the probability of producing single topic UGC would be in the next, and vice versa. Furthermore, we discussed the effect of language/linguistic style matching between firm feedbacks and UGCs on users’ variety-seeking tendencies in UGCs’ production. This study makes three contributions: broadening variety-seeking theory to new behavior, that is content production behavior, and the results demonstrated that people would show a variety-seeking behavior in producing UGCs. a new feasible method to measure the variety of UGCs by using topic modeling to extract the topics of UGCs and then measure the variety-seeking behavior in producing UGCs by analyzing the choice between single topic and multiple topics. guidance for the firm to alter LSM of feedbacks to influence the variety of UGCs. (shrink)

IntroductionTranscranial direct current stimulation is a noninvasive brain stimulation technique that applied to modulate brain activity and enhance motor recovery. However, the neurobiological substrates underlying the effects of tDCS on brain function remain poorly understood. This study aimed to investigate the central mechanisms of tDCS on improving the athletic performance of male rowing athletes.MethodsTwelve right-handed male professional rowing athletes received tDCS over the left primary motor cortex while undergoing regular training. The resting-state functional magnetic resonance imaging data were acquired before (...) and after tDCS. Measures of amplitude of low-frequency fluctuation and regional homogeneity were calculated and compared between baseline and follow-up, as well as topological measures including global and local efficiency of functional brain networks constructed by graph theoretical analysis.ResultsMale rowing athletes showed increased isokinetic muscle strength of the left knee and left shoulder after tDCS. Increased ALFF values were found in the right precentral gyrus of male rowing athletes after tDCS when compared with those before tDCS. In addition, male rowing athletes showed increased ReHo values in the left paracentral lobule following tDCS. Moreover, increased nodal global efficiency was identified in the left inferior frontal gyrus of male rowing athletes after tDCS.ConclusionThe findings suggested that simultaneous tDCS-induced excitation over the primary motor cortex might potentially improve the overall athletic performance in male rowing athletes through the right precentral gyrus and left paracentral lobule, as well as left inferior frontal gyrus. (shrink)

In recent years, the green aviation technology draws more attention, and more hybrid power units have been applied to the aerial vehicles. To achieve the high performance and long lifetime of components during varied working conditions, the effective regulation of the energy management is necessary for the vehicles with hybrid power unit. In this paper, power prediction-based model predictive control for energy management strategy is proposed for the vehicle equipped with HPU based on turboshaft engine in order to maintain proper (...) battery’s state of charge and decrease turboshaft engine’s exhaust gas temperature. First, a modeling approach based on data-driven method is adopted to obtain the mathematical model of turboshaft engine considering time delay and inertial of states. An integrated power predictor consisting of the classification of input status and the subpredictors are developed based on the deep learning method to improve the accuracy of the prediction model of the model predictive control. Subsequently, an EMS based on MPC using the proposed power predictor is introduced to regulate the SOC of battery and the EGT of turboshaft engine. The comparison with experimental results shows the high accuracy of mathematical model of turboshaft engine. The simulation results show the effectiveness of the proposed EMS for the vehicle, and the effects of different weight coefficients of objective function on the proposed EMS are discussed. (shrink)

In the present study, we tested the effectiveness of color coding on the programming learning of students who were learning from video lectures. Effectiveness was measured using multimodal physiological measures, combining eye tracking and electroencephalography. Using a between-subjects design, 42 university students were randomly assigned to two video lecture conditions. The participants’ eye tracking and EEG signals were recorded while watching the assigned video, and their learning performance was subsequently assessed. The results showed that the color-coded design was more beneficial (...) than the grayscale design, as indicated by smaller pupil diameter, shorter fixation duration, higher EEG theta and alpha band power, lower EEG cognitive load, and better learning performance. The present findings have practical implications for designing slide-based programming learning video lectures; slides should highlight the format of the program code using color coding. (shrink)

Post-stroke depression is a serious complication of stroke that significantly restricts rehabilitation. The use of immersive virtual reality for stroke survivors is promising. Herein, we investigated the effects of a novel immersive virtual reality training system on PSD and explored induced effective connectivity alterations in emotional networks using multivariate Granger causality analysis. Forty-four patients with PSD were equally allocated into an immersive-virtual reality group and a control group. In addition to their usual rehabilitation treatments, the participants in the immersive-virtual reality (...) group participated in an immersive-virtual reality rehabilitation program, while the patients in the control group received 2D virtual reality rehabilitation training. The Hamilton Depression Rating Scale, modified Barthel Index, and resting-state functional magnetic resonance imaging data were collected before and after a 4-week intervention. rsfMRI data were analyzed using multivariate GCA. We found that the immersive virtual reality training was more effective in improving depression in patients with PSD but had no statistically significant improvement in MBI scores compared to the control group. The GCA showed that the following causal connectivities were strengthened after immersive virtual reality training: from the amygdala, insula, middle temporal gyrus, and caudate nucleus to the dorsolateral prefrontal cortex; from the insula to the medial prefrontal cortex; and from the thalamus to the posterior superior temporal sulcus. These causal connectivities were weakened after treatment in the control group. Our results indicated the neurotherapeutic use of immersive virtual reality rehabilitation as an effective non-pharmacological intervention for PSD; the alteration of causal connectivity in emotional networks might constitute the neural mechanisms underlying immersive-virtual reality rehabilitation in PSD. (shrink)

BackgroundIn the early days of COVID-19 outbreak, the normally orderly health system was severely challenged by large numbers of feverish patients and shortage of healthcare workers. The outbreak played a harmful role in the mental health of these healthcare workers.ObjectiveWe aim to assess the prevalence of moderate or severe anxiety and depression symptoms of healthcare workers in different regions during COVID-19 disaster and identify the potential risk factors.MethodsWe did a cross-sectional study on ADS of healthcare workers in epicenter-Hubei province and (...) regions in lower epidemic-other provinces by questionnaire online. The data of ADS, the demographic characteristics, occupational exposure, physical condition, family situation, and coping styles were collected and analyzed.ResultsA total of 24.68% of the respondents had experienced moderate or severe ADS. Moderate or severe ADSs were in a higher prevalence in Hubei than other provinces. Suspicious symptoms on their own and in family members were independent risk factors of moderate or severe ADS of all health workers. Working on the frontline was the independent risk factor for participants in Hubei province, whereas quarantine was the independent risk factor for those in other provinces. Moreover, among all participants, those with negative coping style were more than four times more likely to have moderate or severe ADS than those with positive coping style.ConclusionModerate or severe ADSs were in a higher prevalence in healthcare workers of Hubei province during COVID-19 outbreak. The coping style may have major impact on ADS in such situation. (shrink)

本书以海外华人以及海外华人社会为主要研究对象,总结和提炼海外华人社会适用中国传统法律的方式方法与特征,考察中国传统法律文化对于华人日常生活所起的作用.对海外华人与中国传统法律文化保存与传播的互动作用进 行解析.以中国传统法律在东南亚诸国之影响为主线,借重国际关系史,汉学以及文化交流史等方面的史料和现有的研究成果,以法律史的角度重新解读, 深化中国传统法律文化域外影响,尤其是对'中华法系'以外国家的影响研究.

_Wh_-questions with the modal verb _can_ admit both mention-some (MS) and mention-all (MA) answers. This paper argues that we should treat MS as a grammatical phenomenon, primarily determined by the grammar of the _wh_-interrogative. I assume that MS and MA answers can be modeled using the same definition of answerhood (Fox in Mention-some interpretations, MIT seminar, 2013 ) and attribute the MS/MA ambiguity to structural variations within the question nucleus. The variations are: (i) the scope ambiguity of the higher-order _wh_-trace (...) and (ii) the absence/presence of an anti-exhaustification operator. However, treating MS answers as complete answers in this way contradicts the widely adopted analysis of uniqueness effects in questions of Dayal (Locality in _wh_ quantification: Questions and relative clauses in Hindi, 1996 ), according to which the uniqueness effects of singular _which_-phrases arise from an exhaustivity presupposition, namely that a question must have a unique exhaustive true answer. To solve this dilemma, I propose that question interpretations presuppose Relativized Exhaustivity: roughly, the exhaustivity in questions is evaluated relative to the accessible worlds as opposed to the anchor/utterance world. Relativized Exhaustivity preserves the merits of Dayal’s exhaustivity presupposition while permitting MS; moreover, it explains the local-uniqueness effects in modalized singular _wh_-questions. (shrink)

马克昌(1926~ ),武汉大学法学院教授博士研究生导师,中国法学会常务理事,中国法学会刑法学研究会副总干事.

◎孔子為何周遊列國？因為沒有一個國君想用儒家治國，他只好到處教書遊說。 ◎秦國用法家統一天下，漢高祖劉邦用道家蓄積國力，直到漢武帝登基，儒家才被注意。 ◎儒學為何從沒人理，轉眼變治國工具？這得從董仲舒的「解釋」說起。 ◎儒學就像作業系統，幾千年來更新過四次版本，孔子的儒學不等於現在的儒學。 作者馬大勇，清華大學、上海交通大學國學特聘教授。 曾被推舉為最受歡迎的中文教授。 在本書中，他將儒家文明分為五個時期： 孔子奠基期、孟子成熟期、兩漢經學期、宋代理學期和明代心學期。 解析儒家思維是如何像電腦作業系統一樣，歷經四次的版本更新， 從原本的中庸之道、民為貴、君為輕的民主思想， 一步步變成君權神授，天人感應， 成為各朝代帝王穩固皇權的最佳推手。 就此儒學變成帝王學，開啟了千年以來人民為皇權奴隸的中央集權體制。 ◎孔子的儒學，是教你如何當君子 《論語》中，仁字出現了104次，禮字出現74次， 孔子的重要理念「中庸之道」，更成為宋元以後科舉考試的必讀書。 這個具有人道主義的思維，為何不被當時的統治者如春秋諸侯或秦國採納？ 因為亂世中，做君子的好處太少，當小人能得到的利益比較多。 ◎孟子是民主思想的啟蒙者，但被後代皇帝刪掉了 孟子思想的最大亮點就是「民為貴，社稷次之，君為輕」， 這套民主思維後來為何會消失？ 因為明太祖朱元璋看到「君為輕」三個字，就把《孟子》一書狠狠摔地上， 刪節版《孟子》就此誕生，往後一百年，學生學到的孔孟儒學知識都是不完整的。 ◎因為董仲舒的「特殊解釋」，從此百家遭罷黜，皇帝獨尊儒術 秦國用法家思想滅六國一統天下，漢高祖劉邦用道家治國，修生養息， 兩大皇權都對儒家思維沒興趣，直到漢武帝劉徹時期， 董仲舒為了拍皇帝馬屁，重新解釋，儒術從此轉化帝王術。 他口中的儒教，跟孔孟闡述的儒學，哪裡不一樣？差在造神。 ◎宋元明清重新詮釋儒學，想當官者必讀四書 宋、元之後，孔子的《中庸》又重新被提起， 因為它教你用大學之道維持國家秩序。 儒學家朱熹更讓《四書集注》成為為官者的必讀聖書。 至於為什麼是宋朝與明朝，跳過了大唐盛世？ 因為東漢黨錮之禍殺害許多知識分子，儒家文化走向低谷； 南北朝興盛佛教；至於唐朝則儒、釋、道並重。 直到韓愈寫的《原道》為儒家文明打下基礎，在宋代發揚光大。 打天下靠武力，龍椅要坐穩就靠統治， 儒家思想如何經過五階段改造，從民主思維變中央集權， 而且延續千年「至今」不墜。 本書特色 儒學為何從沒人理，轉眼變治國工具？這得從董仲舒的「解釋」說起。 孔子的儒學，如何經過五階段改造，從民主思維變中央集權。 名人推薦 淡江大學中文系教授／高柏園.

本书评介了普列汉诺夫及其美学思想,尤其是从艺术的起源、艺术与社会心理等方面讨论了普列汉诺夫的观点,提出许多新的见解。.

本书考察了颜钧思想产生的社会历史背景及颜钧生平;构建了表述颜钧“大中哲学”的理论框架,包括它的经典依据、它的心性论和工夫论、它的人生价值观和社会理想;阐释了颜钧思想的特征及其在当时和对后世的影响。.

20世紀極權主義的思想根源是什麽？ 這個問題正是伯林與施特勞斯畢生追問的根本問題。 在一元主義與多元主義之間，在絕對主義與相對主義之間，我們應該何去何從？ 為什麽人類追求自由，卻走向了自由的反面？ 《反自由的自由：伯林與施特勞斯的思想紛爭》提出了這一疑問 20世紀的極權主義是人類歷史上史無前例的政治悲劇，典型案例是蘇聯共產主義和德國納粹主義。伯林是流亡英國的俄裔猶太人，童年曾目睹俄國革命，壯年曾造訪蘇聯，對蘇聯共產主義有著痛徹心扉的體驗。在他看來，蘇聯 共產主義根源於馬克思主義，而馬克思主義發源於一元主義與絕對主義。施特勞斯是流亡美國的德裔猶太人，早年僥倖逃脫納粹的魔爪，從此寄身於異國他鄉。因此，他對德國納粹主義有著深入骨髓的反思。他認為，德國納粹主 義肇源於自由主義，而自由主義淵源於多元主義與相對主義。倘若如是，我們的困境是，在一元主義與多元主義之間，在絕對主義與相對主義之間，應該何去何從？為什麽兩個具有類似極權主義經歷的思想家卻作出了截然相反的 診斷？我們的困惑是，為什麽人類追求自由卻走向了自由的反面？馬華靈試圖在《反自由的自由：伯林與施特勞斯的思想紛爭》一書解答上述疑問。.

本书是作者反复研读先秦诸子典籍和历代相关研究著作后,以先秦诸子寓言为切入点,对中国历史及其文化之最初思想成因的全面探究。.

在中國伊斯蘭教研究中，有“回族四大著作家”（王岱輿、馬注、劉智、馬複初）的說法。馬注思想之所以值得重視和研究，完全與他出生於回族世家，自幼受儒學教育從而在融合伊斯蘭與儒家思想方面，做出了重要貢獻。他的 《清真指南》堪稱伊斯蘭教中國化方面的傑出代表作。當前，世界範圍內伊斯蘭教的賽萊菲耶極其活躍。它在國際政治領域，已經產生了可見的危害；它在思想、文化、宗教領域的流傳，人們同樣不應低估它的嚴重影響。.

Antibiotic allergies are commonly reported among patients, but most do not experience reactions on rechallenge with the same agents. These reported allergies complicate management of infections in patients labelled as having penicillin allergy, including serious infections where penicillin-based antibiotics are the first-line (most effective and least toxic) treatment option. Allergy labels are rarely questioned in clinical practice, with many clinicians opting for inferior second-line antibiotics to avoid a perceived risk of allergy. Reported allergies thereby can have significant impacts on patients (...) and public health, and present major ethical challenges. Antibiotic allergy testing has been described as a strategy to circumvent this dilemma, but it carries limitations that often make it less feasible in patients with acute infections or in community settings that lack access to allergy testing. This article provides an empirically informed ethical analysis of key considerations in this clinical dilemma, usingStaphylococcus aureusbacteraemia in patients with penicillin allergies as a case study. We argue that prescribing first-line penicillin-based antibiotics to patients with reported allergies may often present a more favourable ratio of benefits to risks, and may therefore be more ethically appropriate than using second-line drugs. We recommend changes to policy-making, clinical research and medical education, in order to promote more ethically acceptable responses to antibiotic allergies than the status quo. (shrink)

马忠林(1914~ ),东北师范大学数学系教授,中国数学会会员,吉林省数学会常务理事,日本三大学数学教育学研究会名誉会长.

本书是作者的论文集,包括科技革命与两种社会制度的嬗变、全球化问题研究、“第三条道路”与社会福利制度改革三部分。附:新科技革命对两种社会制度的挑战——高放教授访谈录。.