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The purpose of this study is to examine how direct-negative and indirect-negative contact experiences affect students' attitudes toward the police by race and test the mediation effect of social distance on the relationship.

Using the data collected from two US 4-year public universities, this study employed structural equation modeling (SEM) to test the impacts of the key variables, direct-negative and indirect-negative contact experience, on the students' attitudes toward the police. This study also tests whether indirect negative contact with the police is a stronger factor than direct negative contacts among racial/ethnic minority people.

Results show that both direct-negative and indirect-negative contacts are stronger predictors of the dependent variable. In particular, the indirect-negative contact has significant direct and indirect effects through social distance on the dependent variable in racial minorities. The study also shows that indirect contact more strongly affects racial minorities than direct-negative contact experiences do.

This study is the first sophisticatedly to examine students' negative contact experiences into two variables: direct-negative and indirect-negative contacts with the police.

In cities with high density, heat is often trapped between buildings which increases the frequency and intensity of heat events. Researchers have focused on developing strategies to mitigate the negative impacts of heat in cities. Adopting green infrastructure and cooling pavements are some of the many ways to promote thermal comfort against heat. The purpose of this study is to improve microclimate conditions and thermal comfort levels in high-density living conditions in Seoul, South Korea.

This study compares six design alternatives of an apartment complex with different paving and planting systems. It also examines the thermal outcome of the alternatives under normal and extreme heat conditions to suggest strategies to secure acceptable thermal comfort levels for the inhabitants. Each alternative is analyzed using ENVI-met, a software program that simulates microclimate conditions and thermal comfort features based on relationships among buildings, vegetation and pavements.

The results indicate that grass paving was more effective than stone paving in lowering air temperature and improving thermal comfort at the near-surface level. Coniferous trees were found to be more effective than broadleaf trees in reducing temperature. Thermal comfort levels were most improved when coniferous trees were planted in paired settings.

Landscape elements show promise for the improvement of thermal conditions because it is much easier to redesign landscape elements, such as paving or planting, than to change fixed urban elements like buildings and roads. The results identified the potential of landscape design for improving microclimate and thermal comfort in urban residential complexes.

The results contribute to the literature by examining the effect of tree species and layout on thermal comfort levels, which has been rarely investigated in previous studies.

This study aims examine to what extent four variable categories of individual ethical ideology, organizational ethical culture, superior's ethical quality and job satisfaction (JS) are causally linked to personal (un)ethical behaviors among South Korean police officers.

With a stratified sampling technique, 687 surveys were collected from 16 major local police headquarters across the nation. The reliability and validity of the variables were checked. The structural equation modeling (SEM) is used to test the hypotheses.

Idealism, principlism, utilitarianism and JS have a negative influence on unethical behaviors, whereas superior's unethical standards are positively associated with unethical behaviors.

The findings can be applied as a reference to improve ethical framework to promote behaviors by enriching the higher level of personal ethical ideology, superior's ethical quality and principlism and utilitarianism by adding an ethics training course to the continuing education program for all officers and developing further education programs for police leadership to raise ethical awareness and quality.

To the authors' knowledge, the study is among the first studies with four comprehensive categories of relevant variables and adds understanding to (un)ethical behaviors of police officers.

As the penalized vortex-in-cell (pVIC) method is based on the vorticity-velocity form of the Navier–Stokes equation, the pressure variable is not incorporated in its solution procedure. This is one of the advantages of vorticity-based methods such as pVIC. However, dynamic pressure is an essential flow property in engineering problems. In pVIC, the pressure field can be explicitly evaluated by a pressure Poisson equation (PPE) from the velocity and vorticity solutions. How to specify far-field boundary conditions is then an important numerical issue. Therefore, this paper aims to robustly and accurately determine the boundary conditions for solving the PPE.

This paper introduces a novel non-iterative method for specifying Dirichlet far-field boundary conditions to solve the PPE in a bounded domain. The pressure field is computed using the velocity and vorticity fields obtained from pVIC, and the solid boundary conditions for pressure are also imposed by a penalization term within the framework of pVIC. The basic idea of our approach is that the pressure at any position can be evaluated from its gradient field in a closed contour because the contour integration for conservative vector fields is path-independent. The proposed approach is validated and assessed by a comparative study.

This non-iterative method is successfully implemented to the pressure calculation of the benchmark problems in both 2D and 3D. The method is much faster than all the other methods tested without compromising accuracy and enables one to obtain reasonable pressure field even for small computation domains that are used regardless of a source distribution (the right-hand side in the Poisson equation).

The strategy introduced in this paper provides an effective means of specifying Dirichlet boundary conditions at the exterior domain boundaries for the pressure Poisson problems. It is very efficient and robust compared with the conventional methods. The proposed idea can also be adopted in other fields dealing with infinite-domain Poisson problems.

The purpose of this paper is to expand the research on citizen participation in police work by attempting to disentangle the difference between volunteers and general citizens.

Independent variables including the demographic characteristics, victimization experiences, fear of crime, neighborhood disorders, and satisfaction with the police services were used to explain the volunteers’ attitudes toward the police. A random sample of general citizens was used as a comparison group. Using two data sets derived from a survey of 324 citizen volunteers in community policing programs and a random telephone survey of 1,197 general citizens in Houston, TX, two structural equation modeling models for general citizen sample and citizen volunteer sample were tested.

The results revealed that satisfaction with the police services was the only factor having a direct impact on attitudes toward the police in volunteer group. In addition, volunteers’ attitudes toward the police and satisfaction with the police services were higher than general citizens even though their victimization experiences, fear of crime, perceived neighborhood disorders were higher than general citizens.

The authors argue that there is a strong diffused support, first raised by David Easton (1965), among the volunteers. This exploratory study would be a reference for future studies.

In this paper, we examine whether fund market reactions are affected by the characteristics of categorized features of fund. To investigate the goal of the paper, we consider macroeconomic factors as well as financial characters. We classify fund flow into four groups depending upon type of fund and fund characters to determine which category is better to increase fund flow for capital market after these financial occurrence. In this regard, our research suggests important evidence about the effect of financial factor on fund flow with a case of an detailed situation in Emerging market. In order to test the hypothesis, we use seemingly unrelated regression (SUR) model to choose significant factors among various types of fund market-related changes. Our sample consisted of fund flows from 2006 to 2016 collected by Korean Financial Association and Bank of Korea. The empirical results are summarized as follows : First, we find that capital market index, exchange rate affect fund flows with time-lagged value changes. Second, the stock index fund and banking sector fund sales show strong positive relations with the fund flow changes. Third, values of the fund flow are significantly related with fund sales by asset management’s affiliated financial institution. These results are consistent with the hypotheses that the increase and decrease in the fund flows due to capital market situation are more pronounced as the financial factors fit. Our results suggest that it is necessary to consider the fundamental characteristics of fund flow changes as well as the external economic environment to get a more efficient market performance and supervision.