The coronavirus disease 2019 pandemic caused by severe acute respiratory syndrome coronavirus 2 is challenging the dental community to an unprecedented degree. Knowledge of the increased risk of infection in dental settings has been disseminated to the public and guidelines have been formulated to assist dental attendance decision-making. However, dental attendance behaviors incompatible with treatment need is not uncommon in clinical settings. Important gaps remain in the knowledge about how psychological factors are affecting dental attendance behaviors during the COVID-19 epidemic. (...) In this cross-sectional study, a questionnaire survey was performed during February and March 2020. A total of 342 and 294 dental patients who attended and avoided dental visits, respectively, were included. The participants were classified into four groups based on dental attendance behavior and emergent/urgent dental treatment need. Bivariate analysis was performed to investigate factors associated with dental attendance. Multivariable logistic regression based on principal component scores was performed to identify major psychological constructs associated with unnecessary dental avoidance and attendance. Among all the factors explored, inability to wear masks during dental treatment was most closely associated with the overall pattern of dental attendance among participants. Multivariable regression suggested that unnecessary dental avoidance was associated with perceived risk of infection in general and in dental settings, perceived impact of COVID-19 and dental problems on general health, and personal traits such as trust and anxiety. Unnecessary dental attendance was associated with optimism toward the epidemic and trust. Multidisciplinary efforts involving dental and medical professionals as well as psychologists are warranted to promote more widespread adoption, among the general public, of dental attendance behaviors compatible with dental treatment need during the COVID-19 epidemic. (shrink)

Due to the complexity of the network structure, log analysis is usually necessary for the maintenance of network-based distributed systems since logs record rich information about the system behaviors. In recent years, numerous works have been proposed for log analysis; however, they ignore temporal relationships between logs. In this paper, we target on the problem of mining informative patterns from temporal log data. We propose an approach to discover sequential patterns from event sequences with temporal regularities. Discovered patterns are useful (...) for engineers to understand the behaviors of a network-based distributed system. To solve the well-known problem of pattern explosion, we resort to the minimum description length principle and take a step forward in summarizing the temporal relationships between adjacent events of a pattern. Experiments on real log datasets prove the efficiency and effectiveness of our method. (shrink)

Conflicts in land exploration are incisive social problems which have been the subject in many studies. Risk assessment of land conflicts is effective to resolve such problems. Specifically, fuzzy mathematics and the analytic hierarchy process were combined together to evaluate risk in land conflicts in our work, which is proved useful to solve uncertainty and imprecision problems. Based on the analysis of the principles for the risk assessment of a land conflicts index system, a set of risk assessment indexes using (...) the fuzzy analytic hierarchy process was presented. The results show that the overall risk is at medium level, and the risk of the feasibility index and controllability index need to be paid more attention to. The contribution of this article is reflected in two aspects: the application of FAHP in risk assessments of land conflicts is effective and valid; it is helpful for governments to establish a stricter management system of work safety for conflicts in land exploration based on the risk assessment results. (shrink)

The impostor phenomenon refers to a false internal experience of low intelligence or ability that is associated with anxiety, depression, psychological distress, and burnout. The emotions associated with the IP affect not only personal mental health but also patient care. To address this issue, we need to completely understand the prevalence of and factors related to the IP and ways to resolve/overcome IP feelings. The aim of this scoping review was to identify the existing evidence regarding the IP among nursing (...) students and nurses and determine gaps that can be addressed in future research. We conducted our study based on the scoping review methodological framework proposed by Arksey and O’Malley and advanced by Levac et al.. After searching the Embase, PubMed, Cumulative Index to Nursing and Allied Health Literature, Cochrane Library, Web of Science and ProQuest databases, we identified 11 studies for inclusion in this review. We found that while the IP exists in nursing students and nurses, clinical nurse specialist students and final-year nursing students are at significant risk of impostor behavior. We also found that research in the nursing field has focused on the prevalence of and factors related to the IP, but few studies have addressed ways to resolve/overcome IP feelings. Thus, research in this area should be increased. This scoping review presents research gaps that may serve as a starting point for future work on the IP in the nursing field. (shrink)

In this study, we first introduce polygonal cylinder and torus using Cartesian products and topologically identifications and then find their Wiener and hyper-Wiener indices using a quick, interesting technique of counting. Our suggested mathematical structures could be of potential interests in representation of computer networks and enhancing lattice hardware security.

Resumen: La deportividad china es la esencia de los deportes chinos y el espíritu nacional, y el alma y la esencia de los deportes chinos. En realidad, la gente entiende la deportividad como una forma de ejercicio desligada del nivel espiritual, descuidando el valor espiritual equiparable al ejercicio físico, ocultando sus profundas connotaciones espirituales y arrinconando el espíritu deportivo, lejos de la “valentía”. del alma y la vitalidad del cuerpo” de los deportes. Se han explorado y examinado los fundamentos filosóficos (...) y el desarrollo histórico de la deportividad china, con el objetivo de comprender la profunda connotación y el valor de la deportividad china. Desde la fundación de la República Popular China, el espíritu de los deportes chinos ha desempeñado un papel de liderazgo especial en China y ha sido ampliamente reconocido y afirmado por el Comité Central del Partido y diversas clases sociales. Sin embargo, la comprensión de la gente al respecto no es lo suficientemente profunda y se encuentra sólo en la etapa de investigación preliminar. Para adaptarse a diversas necesidades, la exploración en profundidad del examen filosófico de la deportividad china tiene un valor teórico y una importancia práctica significativos. La deportividad china no se trata sólo de ejercicio físico, sino que también enfatiza la armonía física y mental, el cultivo tanto interno como externo, y la búsqueda de un estado de placer y comodidad físico y mental. La deportividad china está en consonancia con los pensamientos filosóficos tradicionales chinos como la “armonía entre el cielo y el hombre” y la armonía social. (shrink)

Pinch force sense plays an important role in the performance of daily finger movements, including tip, key, palmar pinch. The present study investigated the roles of pinch type in the sensation of pinch force among healthy participants in the ipsilateral force reproduction trial. This study instructed forty healthy adult subjects (20 women and 20 men) in producing reference forces at different levels [10, 30, 50% maximal voluntary isometric contraction (MVIC)] by adopting 3 pinch types (tip, key, and palmar pinches) and (...) in reproducing the above force levels with the identical hand. Our study revealed that subjects are significantly more sensitive detecting alterations of pinching forces with tip pinch but not key or palmar pinch under high forces (30 and 50% MVIC) but not at lower force levels (10% MVIC). (shrink)

The energy hole is a severe problem for underwater acoustic distributed networks in that it affects the normal operations of the network and shortens the network’s life span. To deal with this problem, a loop-free routing control technique is proposed in this paper. The classical shortest-path routing control method is used to generate multiple disjointed routing tables. The residual energy of the nodes and the changing information of the uplink/downlink matrix are added to the data frames for distribution. The source (...) node specifies the routing path to transmit the data frames based on the changing information, and the relay nodes route the data frames strictly according to the routing path designated by the source node. Besides, the energy consumption of the relay node is saved by replying to the pseudo-ACK frame. Simulation experiments are implemented in four typical scenarios, and the results reflect that the proposed technique could extend the network’s life span by approximately 10% when compared to other mature techniques. Besides, it has no other negative effects on the normal operations of the network. (shrink)

The integration of event-related potential and functional magnetic resonance imaging helps to obtain and study neural networks with high temporal and spatial resolution. EEG/fMRI data proves that in the visual tristimulus oddball paradigm, two P300 potentials induced by target stimulation and novel stimulation are detected at the frontal-middle, center, and mid-apical electrodes. Previous studies have shown that P3a and P3b have different spatial distributions of brain activation, but it is unclear whether they have the same neural mechanism. The purpose of (...) this study is to determine the neuropsychological mechanisms of P3a and P3b, as well as the spatiotemporal differences in neurodynamics between the two ERP subcomponents. In a group of 25 subjects, P300 ERP induced by target stimulation and novel stimulation can be detected at the Fz, Cz, and Pz electrodes. At Cz and Fz, compared with P3b related to the target stimulus, the P3a related to the novel stimulus has a higher amplitude and the waveform declines more slowly. But at Pz, P3b has a higher amplitude than P3a. P3a appeared earlier than P3b at Cz and Fz, but the opposite phenomenon was observed at the Pz electrode. The activated brain regions of P3a included the left frontal-parietal lobe region, left anterior wedge lobe region, and right insula, while the target-driven P3b was significantly associated with BOLD changes in the bilateral fusiform gyrus, the left frontal region, and the bilateral insula. The results showed that the integration of the spatial and temporal information of the two imaging modes, namely, ERP and fMRI, proves the existence of the different brain function processes of the two P300 subcomponents. Through the analysis of the composition of P300, the results further proved that the top-down and bottom-up processing processes have played a role in the occurrence of attention capture. It is just that the modulation effects of the two processing mechanisms are different in different tasks. Therefore, it should be noted that the captured neural mechanism is not a single top-down or bottom-up processing process but should be the result of the interaction between the two. (shrink)

Alcohol use disorder is one of the most common substance use disorders contributing to both behavioral and cognitive impairments in patients with AUD. Recent neuroimaging studies point out that AUD is a typical disorder featured by altered functional connectivity. However, the details about how voxel-wise functional coordination remain unknown. Here, we adopted a newly proposed method named functional connectivity density to depict altered voxel-wise functional coordination in AUD. The novel functional imaging technique, FCD, provides a comprehensive analytical method for brain's (...) “scale-free” networks. We applied resting-state functional MRI toward subjects to obtain their FCD, including global FCD, local FCD, and long-range FCD. Sixty-one patients with AUD and 29 healthy controls were recruited, and patients with AUD were further divided into alcohol-related cognitive impairment group and non-cognitive impairment group. All subjects were asked to stay stationary during the scan in order to calculate the resting-state gFCD, lFCD, and lrFCD values, and further investigate the abnormal connectivity alterations among AUD-NCI, ARCI, and HC. Compared to HC, both AUD groups exhibited significantly altered gFCD in the left inferior occipital lobe, left calcarine, altered lFCD in right lingual, and altered lrFCD in ventromedial frontal gyrus. It is notable that gFCD of the ARCI group was found to be significantly deviated from AUD-NCI and HC in left medial frontal gyrus, which changes probably contributed by the impairment in cognition. In addition, no significant differences in gFCD were found between ARCI and HC in left parahippocampal, while ARCI and HC were profoundly deviated from AUD-NCI, possibly reflecting a compensation of cognition impairment. Further analysis showed that within patients with AUD, gFCD values in left medial frontal gyrus are negatively correlated with MMSE scores, while lFCD values in left inferior occipital lobe are positively related to ADS scores. In conclusion, patients with AUD exhibited significantly altered functional connectivity patterns mainly in several left hemisphere brain regions, while patients with AUD with or without cognitive impairment also demonstrated intergroup FCD differences which correlated with symptom severity, and patients with AUD cognitive impairment would suffer less severe alcohol dependence. This difference in symptom severity probably served as a compensation for cognitive impairment, suggesting a difference in pathological pathways. These findings assisted future AUD studies by providing insight into possible pathological mechanisms. (shrink)

Cross-shareholding is a new type of strategic means for capital operation and is an important component of corporate governance. With the increasing complexity of business motivation, the structure of a cross-shareholding network is becoming more intricate, and it exposes various important local patterns with different economic functions. The goal of this paper is to uncover investment mechanisms and economic functions implied in cross-shareholding networks by analyzing the local characteristic patterns of company interactions. In this paper, we construct the CSNs of (...) listed companies and extract the directed triadic motifs to reveal the evolutionary characteristics of local investment patterns at the company and industry levels. On the company level, we find that companies tend to form V-shaped structures with other companies, but bidirectional shareholding patterns and circular relationships in the triads are scarce. On the industry level, we identify the characteristic linking patterns of some industries with a role analysis of the industries. Furthermore, we detect the evolutionary characteristics of industry interrelationships in three implied patterns. Such a motif evolution analysis may provide valuable information for investors and supervisory departments that make decisions about investment portfolios and policy. Meanwhile, this study is also helpful for exploring the implied information in other empirical networks. (shrink)

ObjectiveWe conducted the following cross-sectional study to comprehensively assess the anxiety among Chinese international students who studied online during the COVID-19 pandemic and its influencing factors.MethodsQuestionnaires were distributed through “Sojump,” and a total of 1,090 valid questionnaires were collected. The questionnaire was divided into two parts: general situation and anxiety assessment of students. The former used a self-made questionnaire, and the international general GAD-7 scale was used to measure anxiety. Chi-square test was used to analyze the differences between groups, and (...) logistic regression analysis was performed for the factors with differences.ResultsAnxiety was found in 707 of 1,090 international students. Chi-square test and multivariate Logistic regression analysis showed that the incidence of anxiety was higher in the group under 22 years of age than in the group over 22 years of age ; International students living in big cities had a higher incidence of anxiety than those living in rural areas ; international students who socialized 3 times or less monthly had a higher incidence of anxiety than those who socialized more than 3 times per month ; international students who expected purely online teaching had a higher incidence of anxiety than those who expected purely offline teaching or dual-track teaching ; international students with a subjective score of online learning experience of 6 or less had a higher incidence of anxiety than those with subjective scores of more than 6. However, gender, emotional status, BMI, major of study, vaccination status, and degree type had no significant difference in the incidence of anxiety among international students who studied online during the COVID-19 pandemic.ConclusionDuring COVID-19, international students who were younger, came from big cities, had low social frequency, expected purely online teaching, and had poor experience of online classes were risk factors for anxiety during online classes. (shrink)

本书包括: 全球视域中当代儒学的定位、方法与成果的检讨、当代儒学的课题与人物、儒家传统的政治哲学资源四部分内容.

Detailed summary in vernacular field only.

本書是第一部專門從政治學及社會學角度,討論儒家思想在當代中國政治發展中的地位與作用的學術專著,具有堅實的政治學及社會學理論支撐和學理基礎,以及明晰而嚴格的學科性分析等特點,填補了政治學界在儒家及其"復 興"與大陸政治之關係這一課題上缺乏系統而專業性研究的空白.

本书内容包括:传统价值观的整体透视、简论传统文化中各学派的价值理论、儒家价值理想及其现代意义论析、道家风骨和生命哲学的现代诠释等。.

This study aims to explore if local responsiveness pressure and subsidiary resources influence green management adoption of overseas subsidiaries, and to investigate the relationships between the level of green management adoption and performance. The 101 effective samples were collected from 583 Taiwanese firms, which are listed in the top 1000 manufactory firms and have invested in China. Though structural equation model analysis' empirical results indicate that local responsiveness pressure and subsidiary resources both have positive effects on the level of green (...) management adoption of the subsidiary. This study also suggests that the level of green management adoption is positively related to the subsidiary's performance. (shrink)

The authors find East Asians to be holistic, attending to the entire field and assigning causality to it, making relatively little use of categories and formal logic, and relying on "dialectical" reasoning, whereas Westerners, are more analytic, paying attention primarily to the object and the categories to which it belongs and using rules, including formal logic, to understand its behavior. The 2 types of cognitive processes are embedded in different naive metaphysical systems and tacit epistemologies. The authors speculate that the (...) origin of these differences is traceable to markedly different social systems. The theory and the evidence presented call into question long-held assumptions about basic cognitive processes and even about the appropriateness of the process–content distinction. (shrink)

Language teacher research is conducive to the development of teachers’ teaching skills and professional careers. Thus, many English teacher education programs require student teachers to do research. However, some empirical findings suggest that English as a foreign language student teachers lack research motivation. Consequently, finding suitable interventions to increase their research motivation has become increasingly necessary. In light of the importance of research motivation intervention, this study involved designing an experiment to identify the effect of a value and interest intervention (...) including the sharing of positive research experiences to improve student teachers’ research motivation. Quantitative questionnaires and qualitative semi-structured interviews were used to gather evidence on the change in student teachers’ research motivation during the intervention. The interview data revealed that student teachers’ research motivation was influenced by their belief in the value of research to their teaching practice. The experiment results suggested that student teachers’ intrinsic and extrinsic research motivations both increased after the intervention. However, the intervention was not effective in curbing their failure avoidance tendency. Pedagogical implications of the results are discussed at the end of this article. (shrink)

This paper presents an integrated approach to plan smooth path for robots docking in unknown environments with obstacles. To determine the smooth collision-free path in obstacle environment, a tree structure with heuristic expanding strategy is designed as the foundation of path planning in this approach. The tree employs 3D Dubins curves as its branches and foundation for path feasibility evaluation. For the efficiency of the tree expanding in obstacle environment, intermediate nodes and collision-free branches are determined inspired by the elastic (...) band theory. A feasible path is chosen as the shortest series of branches that connects to the docking station after the sufficient expansion of the tree. Simulation results are presented to show the validity and feasibility of the proposed approach. (shrink)

Within the framework of pragma-dialectics, this paper analyzes the use of dissociations in the spokespersons’ replies at the press conferences held by the Chinese Ministry of Foreign Affairs between 2015 and 2017. As shown in the research results, to cut down the authority of their opponents in criticizing China and to convince the international general public of the Chinese standpoints, four subtypes of dissociation are used, which can be differentiated as: “distorted” Term I versus “authentic” Term II, “ambiguous” Term I (...) versus “univocal” Term II, “broadened” Term I versus “exact” Term II, and “narrowed” Term I versus “exact” Term II. The strategic maneuvering carried out by the spokespersons in confronting their immediate opponents by means of the various subtypes of dissociation is in the first place directed at their primary audience, i.e. the international general public. To make a convincing case, in using dissociations the spokespersons not only adapt in their strategic maneuvering to the demands of their primary audience but also in their selection from the topical potential and the presentational devices. (shrink)

We explore whether digital inclusion, a public policy designed to provide high-speed internet infrastructure for historically digitally excluded populations, is associated with the social and ethical challenge of financial inclusion. Using evidence from a sizable P2P lender in the U.S., we document that digital inclusion is positively associated with P2P lending penetration and that this relation is more pronounced in counties with limited commercial bank loan penetration and higher minority populations. Our new evidence from cross-sectional tests suggests that digital inclusion (...) plays a key role in financial inclusion, particularly in regions with more vulnerable and/or underserved populations. In consequence tests, we document that high-risk borrowing is less likely to be denied in counties with higher digital inclusion and that digital inclusion is positively associated with P2P lending efficiency in the form of more repeated borrowing, decreased funding time, and improved funding fulfillment. In addition, we show that the availability of alternative information, a plausible channel through which digital inclusion is related to financial inclusion, is positively associated with efficiency in P2P lending. Our findings indicate that digital inclusion can empower financial service providers and other stakeholders to collaboratively fulfill their ethical and social responsibilities to meet the financial needs of historically marginalized groups. (shrink)

广东优秀社会科学著作出版基金资助出版国家哲学社会科学“九五”规划课题项目广东省高校“九五”青年人文社会科学研究项目广州市社会科学基金资助项目广州市社会科学院资助课题.

As part of a research project on confrontational maneuvering in the spokespersons’ argumentative replies at the regular press conferences of China’s Ministry of Foreign Affairs between 2015 and 2018, this article analyzes, within the framework of Pragma-Dialectics, how the spokespersons declare a standpoint at issue unallowed or indisputable in order to avoid having to resolve a difference of opinion as it is, according to the questioning journalist, presented by their immediate opponents. Starting from the various rationales the spokespersons presuppose to (...) be understood and regarded acceptable by the questioning journalist and the international general public, three subtypes of declaring a standpoint unallowed or indisputable are differentiated: the “Necessity Rationale” subtype, the “Desirability Rationale” subtype, and the “Feasibility Rationale” subtype. The confrontational maneuvering by declaring a standpoint unallowed or indisputable carried out by the spokespersons is directed both at the immediate opponent and at the international general public. However, it is the international general public that the spokespersons primarily intend to convince. For this purpose, they make in all three subtypes of the unallowed or indisputable declaration an effort to adapt their response to their primary audience’s demand by making strategic choices from the available topical potential and the available presentational devices. (shrink)

En el siglo pasado el evento más destacado de la historia cubana fue la Revolución de 1959, movimiento social que fue especialmente influyente en la generación que participó en ella, y comenzaba a vivir la postrevolución. En los años ´50 del siglo pasado los cubanos sufrieron un trauma espiritual y físico difícil de superar. Los personajes de Regreso a Ítaca (2016) representan ese periodo, reflejan un micromundo de la situación general de la época. El regreso de España de uno de (...) los personajes provoca una reunión entre cinco amigos en una azotea de La Habana. La discusión entre ellos solo logra revivir la esperanza, al mismo tiempo que la desilusión de su pasado, presente y futuro. Como la obra se presenta bajo la estructura de guion, respeta las tres reglas del teatro, lo que favorece una mirada desde la interpretación teatral. Para este trabajo nos apoyaremos en una perspectiva sociológica y psicológica, a fin de comprender mejor la recreación que Padura y Cantet hacen de la situación general de ese periodo. Nuestro análisis busca mostrar que la intertextualidad entre la literatura y la historia permite entender tanto una época, como las vivencias humanas que tienen lugar en ella, de una manera más vívida. Padura no solo presenta un guion sobre el reencuentro entre cinco viejos amigos, sino que también manifiesta que todos se enfrentan a una reconsideración de las ilusiones perdidas, por y en la Revolución, de una manera dolorosa, pero al mismo tiempo humorística, cáustica e incluso alegre. (shrink)

In the knowledge economy, the process of knowledge sharing and creation for value co-creation frequently emerge in a multi-agent and multi-level system. It's important to consider the roles, functions, and possible interactive knowledge-based activities of key actors for ecological development. Makerspace as an initial stage of incubated platform plays the central and crucial roles of resource orchestrators and platform supporter. Less literature analyses the knowledge ecosystem embedded by makerspaces and considers the interactive process of civil society and natural environment. This (...) study constructs a multi-agent and multi-level knowledge ecosystem from macro, meso, and micro perspective based on Quintuple Helix theory and designs four evolutionary stages of knowledge orchestrating processes. This study finds that the symbiosis, co-evolution, interaction, and orchestration of multiple agents in the knowledge ecosystem should be merged with each other for value co-creation, which helps to take a systematic approach for policymakers, managers, and researchers. (shrink)

Abstract:The most important themes of Wang Lü's painting theory are the "true self" and the "true thing." One reason this topic has not received sufficient attention is that the original text was altered. This article aims to correct and reinterpret the text. After textual research and interpretation, Wang Lü's paintings and painting theory have been reevaluated. This article also responds to some difficult topics such as the relationship between "form" (ᔶ) and "meaning" (ᛣ) and between "following" (ᕲ) and "not following" (...) (䘩) the rules in Chinese painting theory. (shrink)

全书以灾异思想为切入点，以西汉经学灾异思想与思潮为中心，结合先秦至西汉间的时代背景与思想氛围，在细致考察与解读相关文本的基础上，对西汉经学灾异思想的观念来源与理论先导、创立过程与时代特色、理论形态与建 构方法，以及灾异思潮与现实政治的互动等问题，进行了全面深入的研究和探讨；对于经学灾异思想何以会在西汉建立、经学灾异思潮缘何会在西汉爆发、经学灾异论造成了怎样的历史影响，以及如何评价灾异论氛围中的西汉儒 学与儒生群体等问题，本书也进行了系统的反思，并提出了一系列见解。.

The Platform Sūtra presents a variety of concepts, but in the deeper plane all these concepts can be roughly induced as a reinterpretation of enlightenment and a description of Chan’s distinctive experience of enlightenment. Through a sophisticated display of ontological paradox, the sūtra integrates tathāgatagarbha thought with prajñā wisdom to illuminate why enlightenment is possible for ordinary people in their existential life experience. Following the claim of tathāgatagarbha and earlier Chan texts that all sentient beings possess Buddha-nature, the sūtra further (...) blurs the line between empirical mind and pure nature and endows the mind-nature unity with the transcendental implication of original enlightenment. At the same time, the sūtra points out the emptiness and nonattachment of the mind-nature with the doctrines of no-thought, no-form, and no-abiding, which are grounded in the prajñāparamita and Madhyamika literature. For the soteriological-methodological concern, the Platform Sūtra applies the Awakening of Faith’s theory of “two aspects of one-mind” to advocate seeing one’s originally enlightened mind-nature directly from the perception of true reality. This perceptional experience of enlightenment solves the dilemmatic relationship between the two key soteriological categories of ignorance and enlightenment in the Buddhist tradition. As a result, the sūtra emphasizes the approach of sudden awakening and reinterprets samādhi and prajñā as both identically, simultaneously, and inseparably representing the experience of enlightenment. Through metaphors of transmission of Dharma genealogy, ordination genealogy, platform, and even the Platform Sūtra itself, Huineng is presented as a “living Buddha” or successful enlightenment experience by an ordinary person. (shrink)

A result from a standard linear model course is that the variance of the ordinary least squares (OLS) coefficient of a variable will never decrease when including additional covariates into the regression. The variance inflation factor (VIF) measures the increase of the variance. Another result from a standard linear model or experimental design course is that including additional covariates in a linear model of the outcome on the treatment indicator will never increase the variance of the OLS coefficient of the (...) treatment at least asymptotically. This technique is called the analysis of covariance (ANCOVA), which is often used to improve the efficiency of treatment effect estimation. So we have two paradoxical results: adding covariates never decreases the variance in the first result but never increases the variance in the second result. In fact, these two results are derived under different assumptions. More precisely, the VIF result conditions on the treatment indicators but the ANCOVA result averages over them. Comparing the estimators with and without adjusting for additional covariates in a completely randomized experiment, I show that the former has smaller variance averaging over the treatment indicators, and the latter has smaller variance at the cost of a larger bias conditioning on the treatment indicators. Therefore, there is no real paradox. (shrink)

A geometric lattice is the lattice of closed subsets of a closure operator on a set which is zero-closure, algebraic, atomistic and which has the so-called exchange property. There are many profound results about this type of lattices, the most recent one of which, due to Czédli and Schimdt, says that a lattice L of finite length is semimodular if and only if L has a cover-preserving embedding into a geometric lattice G of the same length. The goal of our (...) paper is to offer the following result: a lattice of finite length is semimodular if and only if every cell in L is a 4-element Boolean lattice and the 7-element non-distributive atomistic lattice having 3 atoms is not a cover-preserving sublattice of L. (shrink)

Throughout the ancient society of China, we can find that from Qin and Han Dynasties to Ming and Qing Dynasties, the social nature, political structure and legal system of China did not change endlessly due to the change of dynasties. On the contrary, it was always in a stable state. This has to be attributed to the all-round and deep-seated influence of Confucianism on China society. Confucian culture had an important influence on the development of China's law in the two (...) thousand years after Qin and Han Dynasties. This influence gradually deepened, and eventually became the soul of China's ancient law, which dominated its development value orientation. Under the influence of Confucianism, China's legal culture has its own distinctive spiritual character and institutional characteristics. The theory of "goodness of nature" makes China's legal culture have the characteristics of "morality dominates punishment" and "courtesy for the country"; The thought of "people-oriented" makes China's legal culture have strong humanistic characteristics because of "leniency and caution" and "cherishing people's lives"; The idea of "cheap business" makes China's legal culture show obvious characteristics of public law culture in the field of private law. (shrink)