Pengaruh Selfie-Liking dan Penyesuian Diri terhadap Prestasi Belajar Siswa

Self-liking behavior that has become a lifestyle for teenagers who are active users of social media in the technology era has the potential to cause a decrease in learning achievement which is part of the mastery of knowledge over skills from student learning outcomes.However, empirical studies that explore self-adjustment in learning for adolescents with selfie-liking behavior have not been widely studied. In this study, the researchers aimed to determine the causal relationship between selfie-liking and self-adjustment in learning with high school student achievement. Data were collected from 223 (male=29.6%, female=70.4%) samples aged 16-17 years from three public high schools in Aceh Tamiang. The instrument used in this study were selfie-liking scale and self-adjustment in learning scale. The achievement was measured by using report score.The results of the regression analysis showed that there was no significant collective effect between selfie-liking and self-adjustment in learning achievement (R² = 0.017; F(2.220) = 1.942; p = .146). Partial regression showed that individually, self-liking was not significant in predicting learning achievement (β = -, 045; p = .529), while self-adjustment in learning was a significant predictor of learning achievement (β = ,142; p = . 005). Based on the above research, guidance and counseling teachers are expected to be able to provide preventive counseling services for the effect of excessive selfie like and provide guidance to subject teachers that although students in online learning still display selfie photos, it is not a negative impact on their mental and achievement.

The collective effect of finite-sized inhomogeneities on the spatial spread of populations in two dimensions

The dynamics of a population expanding into unoccupied habitat has been primarily studied for situations in which growth and dispersal parameters are uniform in space or vary in one dimension. Here, we study the influence of finite-sized individual inhomogeneities and their collective effect on front speed if randomly placed in a two-dimensional habitat. We use an individual-based model to investigate the front dynamics for a region in which dispersal or growth of individuals is reduced to zero (obstacles) or increased above the background (hotspots), respectively. In a regime where front dynamics is determined by a local front speed only, a principle of least time can be employed to predict front speed and shape. The resulting analytical solutions motivate an event-based algorithm illustrating the effects of several obstacles or hotspots. We finally apply the principle of least time to large heterogeneous environments by solving the Eikonal equation numerically. Obstacles lead to a slow-down that is dominated by the number density and width of obstacles, but not by their precise shape. Hotspots result in a speed-up, which we characterize as function of hotspot strength and density. Our findings emphasize the importance of taking the dimensionality of the environment into account.

Ascertaining the initiation of epidemic resurgences: an application to the COVID-19 second surges in Europe and the Northeast United States

Assessing a potential resurgence of an epidemic outbreak with certainty is as important as it is challenging. The low number of infectious individuals after a long regression, and the randomness associated with it, makes it difficult to ascertain whether the infectious population is growing or just fluctuating. We have developed an approach to compute confidence intervals for the switching time from decay to growth and to compute the corresponding multiple-location aggregated quantities over a region to increase the precision of the determination. We estimated the aggregate prevalence over time for Europe and the northeast United States to characterize the COVID-19 second surge in these regions during year 2020. We find a starting date as early as 3 July (95% confidence interval (CI): 1–6 July) for Europe and 19 August (95% CI: 16–23 August) for the northeast United States; subsequent infectious populations that, as of 31 December, have always increased or remained stagnant; and the resurgences being the collective effect of each overall region with no location, either country or state, dominating the regional dynamics by itself.

Effect of Bentonite on the Coefficient of Consolidation of Soil

Bentonite is a fine clay, usually occurring as a byproduct of atmospheric weathering of volcanic ash. It is widely known for its capabilities of high absorption of moisture, and swelling, as a result of moisture contact. Bentonite has a crystalline structure with the main constituent as montmorillonite which has a dual-layered structure. It is the main ingredient responsible for imparting valuable properties to bentonite. In this study, several samples were tested from different regions of district Mardan, Pakistan, to analyze the collective effect of bentonite on the region’s soil. An analysis was conducted based on the performed tests on the samples, to predict the consolidation behavior when samples were replaced with 0%, 5%, 10%, and 15% of bentonite by mass. Thecoefficient of consolidation gives the rate of increase of settlement or consolidation when the sample is subjected to externally applied pressure. This study observed a decrease in the coefficient of consolidation of soil with the percentage increase of bentonite reaching a minimum value of 0.005 in2/min showing about four times decrease in the coefficient of consolidation with 15% replacement of soil with bentonite. This behavior of bentonite is attributed to the fact that; being a fine clay, its addition to the soil reduces its pores and fills the open spaces, hence reducing the chances of fluid to penetrate or flow through the soil, resulting in the reduction ofthe coefficient of consolidation Cv.

Bridging Theory on Global Corporate Hierarchy and City Diplomacy: The Case of China

This study tests the relationship between the hierarchical position of cities in the global economy and a typology of cultural, economic, political, and social external relations, namely city diplomacy. We conduct this test on a sample of 46 Chinese cities, seeking to bridge otherwise separate existing theories on the structure of the world city hierarchy and varied dimensions of city diplomacy. Contrary to expectations, we find that the aggregate of the typology of city diplomacy, rather than only the economic dimension, is most closely associated with position in the world city hierarchy. This tentatively suggests that the collective effect of internationally-oriented cultural, economic, political and social activities in Chinese cities reflect the global structure of the highest levels of globalized urban wealth.

Corporate Governance and Working Capital Management — Inclusive Approach for Measuring the Firm Performance

The least effective working capital management and poor corporate governance resulted in the 2008 global financial crisis besides various other factors as highlighted by the prior studies. So far, the existing literature reveals that WCM and CG affect firm performance (FP) on an individual basis. However, the collective effect of working capital management and corporate governance on firm performance has been paid the least attention. This study investigates the collective effect of working capital management and corporate governance on firm performance for Australia and Hong Kong markets, being the top two markets in the Pacific region. For this purpose, a system generalized method of moments based on two steps is applied to address the endogeneity issue. The results establish that working capital management and corporate governance affect firm performance on an individual basis and then these individual effect results compliment the collective effect results. The limitation of the study is that it did not consider two stages of Least Squares Regression due to difficulty in the identification of instrumental variables for both explanatory variables. As a policy implication, firm manager may take the benefit of the findings of this study while devising financial policies to enhance firm performance. Future investors may use the findings of this study to make an informed decision on future investment in both markets.