scholarly journals Long-term variations in solar radiation, diffuse radiation, and diffuse radiation fraction caused by aerosols in China during 1961–2016

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0250376
Author(s):  
Hongfei Xie ◽  
Junfang Zhao ◽  
Kaili Wang ◽  
Huiwen Peng
Keyword(s):  
Solar Radiation ◽  
Atmospheric Aerosols ◽  
Terrestrial Ecosystem ◽  
Diffuse Radiation ◽  
Total Solar Radiation ◽  
Total Radiation ◽  
Negative Effects ◽  
Positive Effects ◽  
Sunshine Hours ◽  
The Impact

The effects of atmospheric aerosols on the terrestrial climate system are more regional than those of greenhouse gases, which are more global. Thus, it is necessary to examine the typical regional effects of how aerosols affect solar radiation in order to develop a more comprehensive understanding. In this study, we used global AErosol RObotic NETwork (AERONET) data and robust radiation observational evidence to investigate the impact of aerosols on total radiation, diffuse radiation, and the diffuse radiation fraction in China from 1961 to 2016. Our results showed that there were different temporal changes in the aerosol optical depth (AOD), total solar radiation, diffuse radiation and diffuse radiation fraction over the past 56 years. Specifically, the 550 nm AOD from 2005 to 2016 decreased significantly, with annual average AOD of 0.51. Meanwhile, the average total solar radiation reduced by 2.48%, while there was a slight increase in average diffuse radiation at a rate of 3.10 MJ·m-2·yr-1. Moreover, the spatial heterogeneities of AOD, total radiation, diffuse radiation, and the diffuse radiation fraction in China were significant. Aerosol particle emissions in the developed eastern and southern regions of China were more severe than those in the western regions, resulting in higher total radiation and diffuse radiation in the western plateau than in the eastern plain. In addition, aerosols were found to have negative effects on total radiation and sunshine hours, and positive effects on diffuse radiation and diffuse radiation fraction. Further, the diffuse radiation fraction was negatively correlated with sunshine hours. However, there was a positive correlation between AOD and sunshine hours. These results could be used to assess the impacts of climate change on terrestrial ecosystem productivity and carbon budgets.

Evaluation of Different Radiation and Albedo Models for the Prediction of Solar Radiation Incident on Tilted Surfaces, for Four European Locations

1996 ◽  
Vol 118 (3) ◽  
pp. 183-189 ◽  
Author(s):  
B. E. Psiloglou ◽  
C. A. Balaras ◽  
M. Santamouris ◽  
D. N. Asimakopoulos
Keyword(s):  
Solar Radiation ◽  
Diffuse Radiation ◽  
Vertical Surface ◽  
Mean Bias Error ◽  
Bias Error ◽  
Total Solar Radiation ◽  
Total Radiation ◽  
Radiation Incident ◽  
Tilted Surface ◽  
Significant Difference

The diffuse radiation incident on an inclined surface is composed of both the sky diffuse radiation and the ground-reflected radiation. Depending on the model used to calculate the sky diffuse radiation and the estimated albedo value, it is possible to introduce a significant error in the prediction of the total radiation incident on a tilted surface. Twelve sky diffuse submodels associated with four different albedo submodels are used to estimate the total radiation on the tilted surface from data on the horizontal plane. The predicted total solar radiation values are compared with measured data on a south facing vertical surface, from four representative south and north European locations. Root mean square error, mean bias error, and a t-test are used to determine the intrinsic performance of each combination of diffuse tilt and albedo submodel. Accordingly, the various model combinations do not exhibit a statistically significant difference between measured and calculated values.

Developing and Evaluation of Various Correlations for Diffuse Solar Radiation for Urla (Izmir, Turkey)

2012 ◽  
Vol 135 (2) ◽  
Author(s):  
Orhan Ekren
Keyword(s):  
Solar Radiation ◽  
Solar Energy ◽  
Tracking System ◽  
Diffuse Radiation ◽  
Energy System ◽  
Solar Irradiation ◽  
Total Solar Radiation ◽  
Total Radiation ◽  
Diffuse Solar Radiation ◽  
Tilted Surface

Characteristics of site-specific solar irradiation is required to optimize a solar energy system. If no tracking system is used, the amount of electricity or heat produced by solar energy depends on the total solar radiation on a tilted surface. Although pyranometer measures direct plus diffuse solar radiation on a horizontal surface, there are many locations where diffuse radiation is not measured. Also, diffuse radiation is necessary to determine the total radiation on a tilted surface. Therefore, in this study, new correlations for diffuse solar radiation is proposed as a function of atmospheric parameters for Urla (Izmir, Turkey). After applying the statistical procedure on the measured data, seven new correlations are proposed for the ratio of hourly average diffuse and total radiation. Also, the ratio of monthly average daily diffuse and total radiation for this region is proposed.

scholarly journals Global radiation, photosynthetically active radiation, and the diffuse components dataset of China, 1981–2010

2018 ◽  
Author(s):  
Xiaoli Ren ◽  
Honglin He ◽  
Li Zhang ◽  
Guirui Yu
Keyword(s):  
Solar Radiation ◽  
Photosynthetically Active Radiation ◽  
Global Radiation ◽  
Terrestrial Ecosystem ◽  
Diffuse Radiation ◽  
Research Network ◽  
Ecosystem Productivity ◽  
Ecosystem Models ◽  
Active Radiation ◽  
The Impact

Abstract. Solar radiation, especially photosynthetically active radiation (PAR), is the main energy source of plant photosynthesis; and the diffuse component can enhance canopy light use efficiency, thus increasing ecosystem productivity. In order to predict the terrestrial ecosystem productivity precisely, we not only need global radiation and PAR as driving variables, but also need to treat diffuse radiation and diffuse PAR explicitly in ecosystem models. Therefore, we generated a series of radiation datasets, including global radiation, diffuse radiation, PAR, and diffuse PAR of China from 1981 to 2010, based on the observations of China Meteorology Administration (CMA) and Chinese Ecosystem Research Network (CERN). The dataset should be useful for the analysis of the spatio-temporal variations of solar radiation in China and the impact of diffuse radiation on terrestrial ecosystem productivity based on ecosystem models. The dataset is freely available from the Zenodo at the website of https://zenodo.org/record/1198894 (DOI: 10.11922/sciencedb.555).

Testing the Theory of Communication and Uncertainty Management in the Context of Digital Transformation with Transformational Leadership as a Moderator

2021 ◽  
pp. 232948842110239
Author(s):  
Masaki Matsunaga
Keyword(s):  
Social Support ◽  
Transformational Leadership ◽  
Job Performance ◽  
Self Efficacy ◽  
Relevant Literature ◽  
Uncertainty Management ◽  
Digital Transformation ◽  
Negative Effects ◽  
Positive Effects ◽  
The Impact

Digital transformation provokes a great deal of uncertainty among employees. To gain insights into how employees manage the uncertainty driven by digital transformation and also how leaders can support them, this study has drawn on the theory of communication and uncertainty management (TCUM), which posits that the impact of uncertainty varies by how individuals appraise it and social support enhances positive appraisal. Based on those tenets, the current study advanced the following hypotheses: (a) uncertainty has direct and indirect negative effects on employees’ appraisal of digital transformation, self-efficacy, and job performance; (b) in contrast, direct supervisors’ transformational leadership has direct and indirect positive effects on appraisal, self-efficacy, and job performance; and also (c) transformational leadership moderates the impact of uncertainty. SEM with 4-wave time-separated data ( N = 873 employee-supervisor dyads in Japan) found support for these hypotheses. The obtained findings are discussed with reference to TCUM, transformational leadership, and other relevant literature.

The effect of consumers' religiosity on consumer ethics: the mediating role of ethical ideology

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Denni Arli ◽  
Fandy Tjiptono
Keyword(s):  
Consumer Ethics ◽  
Ethical Ideology ◽  
Negative Effects ◽  
Content Type ◽  
Mediating Role ◽  
Positive Effects ◽  
Central Java ◽  
Consumer Ethics Scale ◽  
The Impact

PurposeReligious doctrines generally encourage people to behave ethically. However, in daily life, individuals notice inconsistencies between religious beliefs and behavior, leading them to ask, in the context of commerce, why religious consumers would behave unethically. The purpose of this study was to investigate the impact of consumers' intrinsic and extrinsic religiosity on their ethical behavior. Specifically, the moderating effect of ethical ideology on the relationship between Indonesian consumers' religiosity and their ethics was examined by means of a survey.Design/methodology/approachThe data derived from the questionnaire were complemented by convenience samples of Indonesians living in Daerah Istimewa Yogyakarta (DIY) in central Java. The researchers distributed 600 questionnaires in two major shopping malls and several housing areas in the region, of which 467 were completed and returned, for an overall response rate of 77.8%.FindingsThe results indicated that the participants' intrinsic religiosity negatively impacted their ethical beliefs and was mediated by their idealistic ethical ideology. The present study also found that idealism had negative effects on three of the four dimensions of the consumer ethics scale (CES) (actively benefiting, passively benefiting and questionable behavior), while relativism had positive effects on two of the dimensions (passively benefiting and questionable behavior.Research limitations/implicationsOne limitation of the present study was that the analysis did not distinguish among the religions practiced by the respondents to the questionnaire.Originality/valueThis is one of the first few studies investigating the mediating role of ethical ideology in a religious society. This study contributes to the literature on these issues in theoretical and managerial terms by extending the Hunt-Vitell theory (1986) to the context of consumer ethics.

scholarly journals The impact of the means of communication on family relationships

2016 ◽  
Vol 2 (3) ◽  
pp. 344
Author(s):  
Twana Faraidun Hussein
Keyword(s):  
Family Relationships ◽  
Research Community ◽  
Negative Effects ◽  
Positive Effects ◽  
Important Means ◽  
Questionnaire Form ◽  
The One ◽  
The Impact ◽  
The City ◽  
Day By Day

This research tries to access to a range of outcomes, and to answer the fundamental question, a search (What is the impact of the means of communication on family relationships?).Try researcher through the form of a questionnaire to collect information in the field of the research community and in order to achieve his goal, And it relied on the questionnaire form for being an important means used extensively in sociology studies, The center of the city of Sulaymaniyah spatial boundaries of the search, where it is taken (200) and a sample search unit and distributed to three different areas (rich, middle and poor) by taking a stratified random sample, The fact that the population of the city of Sulaymaniyah different in terms of economic and cultural level, it's easy to take the mixed researcher and different sample representing the research community in terms of level, category, and class. They were assembled for the purpose of research and study.      It must be pointed out that this research is particularly important at the present time because the means of communication have spread widely in the Kurdish community and become accessible to everyone on the one hand, on the other hand, the number of users of these methods is increasing day by day, This is in addition to the increased demand for them constantly, making conduct such research in this importance area to see its impact on family relationships, and knowledge of its money from the effects (negative and positive) It is known that this means a double-edged her weapon of negative and positive effects at the same time, It must be the effort to reduce the negative effects of these tools and become members of the community in the service, and most importantly of all, do educate individuals on how to deal with these tools properly. It also offers search a set of proposals and recommendations to the concerned authorities to work out and strengthen the community in front of the challenges of the era of globalization of communications and response, where he became the Kurdish community a society open to the outside world through these means, which resulted in a change of values and social norms and behaviors that were adhered to by members of the community.

scholarly journals To Understand the Team Cohesiveness, Teamwork Quality and Team Performance in Employee Performance in University

2019 ◽  
Vol 8 (2S9) ◽  
pp. 853-858
Keyword(s):  
Organizational Performance ◽  
Team Performance ◽  
Positive Impact ◽  
Employee Performance ◽  
Organization Performance ◽  
Negative Effects ◽  
Team Cohesiveness ◽  
Positive Effects ◽  
Overall Performance ◽  
The Impact

The purpose of this research is to seek and identify the impact teamwork has on organizational performance. The research to understand the teamwork quality, team cohesiveness and team performance in employee performance, identify the positive or negative effects of teamwork on employees and to examine the impact of teamwork on organization performance. Therefore, it is to determine how teamwork could effect and improve University employee’s performance within the organization. In fact, it is also to understand on how methods like teamwork quality, team cohesiveness, and teamwork performance have could be used to have positive effects in employee overall performance. The research study used correlation techniques in order to analyze the relationship between two variables that was Teamwork and Organization Performance. In many of the journals and article that was collected, there was clear evidence that teamwork and other measures of team performance are positively related with organization performance. The study of the research shown that there was a significant positive impact of teamwork on organizational performance and employee’s overall performance.

The Impact of Ceta Programs on Components of Participants' Earnings

ILR Review ◽  
1987 ◽  
Vol 40 (3) ◽  
pp. 430-441 ◽  
Author(s):  
Katherine P. Dickinson ◽  
Terry R. Johnson ◽  
Richard W. West
Keyword(s):  
Nearest Neighbor ◽  
Negative Impact ◽  
Positive Impact ◽  
Hourly Wage ◽  
Negative Effects ◽  
Hours Worked ◽  
Positive Effects ◽  
Hourly Wage Rate ◽  
Women's Earnings ◽  
The Impact

This paper provides the first estimates of the net impact of CETA participation on the components of CETA participants' post-program earnings. Employing a sample of 1975 CETA enrollees and comparison groups drawn from the March 1978 CPS using a nearest-neighbor matching technique, the authors estimate statistically significant negative effects on men's earnings and statistically significant positive effects on women's earnings. These results stem partly from the impact of CETA participation on the likelihood of being employed after leaving the program (negative for men, positive for women), but also from a negative impact on hours worked during the year and hourly wage rate for men and a large positive impact on hours worked per week and weeks worked per year for women.

scholarly journals International spillover effects of U.S. tax reforms: evidence from Germany

2020 ◽  
Author(s):  
Désirée I Christofzik ◽  
Steffen Elstner
Keyword(s):  
German Economy ◽  
Spillover Effects ◽  
Vector Autoregressions ◽  
Negative Effects ◽  
Tax Reforms ◽  
Positive Effects ◽  
Tax Legislation ◽  
Tax Shocks ◽  
The Impact ◽  
Structural Vector

Abstract This paper explores the international transmission of U.S. tax shocks. Using structural vector autoregressions, we study the impact on the German economy and on German tax legislation. Our results suggest that, after a U.S. tax cut, German GDP increases only moderately. Positive effects via the income channel outweigh negative effects stemming from price developments. Significant changes in the transmission channels arise by distinguishing between the types of the U.S. tax shock. German tax policy either reacts with diametric measures, or remains passive when considering the whole sample period. For a sample starting in 1980, we find that, in particular, after U.S. corporate income tax cuts, tax reductions are also implemented in Germany.

From welfare to wealth creation

2018 ◽  
Vol 31 (2) ◽  
pp. 265-286 ◽  
Author(s):  
Divya Verma Gakhar ◽  
Abhijit Phukon
Keyword(s):  
Citation Analysis ◽  
Business Strategy ◽  
Public Management ◽  
Empirical Studies ◽  
Measurement Techniques ◽  
Negative Effects ◽  
Statistical Tools ◽  
Content Type ◽  
Positive Effects ◽  
The Impact

Purpose The purpose of this paper is to review several influential empirical studies that examine the performance of state-owned enterprises (SOEs). The paper undertakes a citation analysis of journals, authors and titles in the area of privatization and firm performance in general, and assesses the impact of privatization on the performance of SOEs in particular. Design/methodology/approach The methodology is based on a systematic and structured review of over 100 papers published in economics, public management, business strategy and related social sciences. The systematic review is based on citation analysis of journals, authors and titles. The journal and author citation counts were tabulated by leveraging the databases of SCImago Journal Rankings and Google Scholar and filtered it to find out the most highly cited journals and authors. The structured review is based on the framing opinion with respect to major findings, variables selected, measurement techniques and statistical tools applied by different researchers. The impact is measured through coding a value “P” in case of positive effects, “N” in case of negative effects and “NT” in case the study found both positive and negative effects. Findings The citation analysis reveals that American Economic Review, Journal of Financial Economics, Review of Financial Studies and Journal of Finance as the top-cited journals, and Megginson and Netter (3,468), Megginson et al. (1,737), Djankov and Murrell (1,356), Boardman and Vining (1,320), Balsam et al. (1,094) and DeWenter and Malatesta (1,018) as the top-cited authors in this particular research field. While majority research studies have revealed a significant improvement in the performance of SOEs in the post-privatization period, few studies have reserved their impact as neutral or even negative in some respects. Originality/value Given that economic transitions, corporate governance, and performance of SOEs have attracted a great attention from public management and business strategy scholars in recent years, this paper aims to summarize a large number of empirical studies that examine the performance of SOEs. The paper would be useful to future researchers especially the beginners and early career researchers in terms of its current trends, selection of variables, measurement techniques and statistical tools applied.

Sign in / Sign up

Export Citation Format

Share Document