Pemanfaatan Teknologi Informasi Pada Usaha Mikro Kecil Dan Menengah Di Kota Jambi

. This study aimed to analyze the use of information technology in small and medium micro enterprises in the Municipality of Jambi. Surveys conducted at 43 businesses SMEs. The results showed the low utilization of information technology in SMEs because: 1) the lack of understanding of the benefits of information technology; 2) the low availability of investment; 3) low support government institution

PENGARUH PENGUNGKAPAN CORPORATE SOCIAL RESPONSIBILITY TERHADAP NILAI PERUSAHAAN DENGAN UKURAN PERUSAHAAN SEBAGAI VARIABEL MODERATING

Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh pengungkapan corporate social responsibility terhadap nilai perusahaan dengan ukuran perusahaan sebagai variabel moderating. Fokus dari penelitian ini adalah perusahaan pertambangan batu bara yang terdaftar di Bursa Efek Indonesia periode 2015-2019. Metode penelitian yang digunakan adalah content analysis. Analisis data untuk pengujian hipotesis dalam penelitian ini adalah uji statistic parameter individual (Uji t) dan koefisien determinasi (r2) dengan menggunakan software SPSS (Statistical Product and Service Solution) versi 24. Hasil penelitian ini menunjukan bahwa: (1) variabel corporate social responsibility berpengaruh positif signifikan terhadap nilai perusahaan (2) Variabel ukuran perusahaan memiliki pengaruh negative signifikan terhadap nilai perusahaan (3) Ukuran perusahaan tidak mampu memoderasi hubungan antara Corporate Social Responsibility terhadap nilai perusahaan.Penelitian ini dilakukan dengan tujuan untuk mengetahui pengaruh pengungkapan corporate social responsibility terhadap nilai perusahaan dengan ukuran perusahaan sebagai variabel moderating. Fokus dari penelitian ini adalah perusahaan pertambangan batu bara yang terdaftar di Bursa Efek Indonesia periode 2015-2019. Metode penelitian yang digunakan adalah content analysis. Analisis data untuk pengujian hipotesis dalam penelitian ini adalah uji statistic parameter individual (Uji t) dan koefisien determinasi (r2) dengan menggunakan software SPSS (Statistical Product and Service Solution) versi 24. Hasil penelitian ini menunjukan bahwa: (1) variabel corporate social responsibility berpengaruh positif signifikan terhadap nilai perusahaan (2) Variabel ukuran perusahaan memiliki pengaruh negative signifikan terhadap nilai perusahaan (3) Ukuran perusahaan tidak mampu memoderasi hubungan antara Corporate Social Responsibility terhadap nilai perusahaan

Analisis Kinerja Reksadana Saham Dan Reksadana Indeks Dalam Penilaian Tingkat Efisiensi Pasar Modal Indonesia

The objectives of this research are: first, to know whether LQ-45 Index Fund performs better than the equity mutual fund in Indonesian capital market; second, to measure the level of Indonesian capital efficiency. Results show that the raw performance and risk-adjusted performance of the LQ-45 Index Fund is better than the performance of all equity mutual funds (concurrently). For the investors who wish to invest their capital in equity mutual fund, however, we have found two individual equity mutual fund which perform better than the LQ-45 Index Fund, that is Phinisi Dana Saham and Rencana Cerdas. The result of this research also shows that the excess performance of the LQ-45 Index Fund is smaller than the excess performance of (individual) equity mutual fund. From this result, we may conclude that Indonesian capital market is an inefficient capital market

Dye lasing in optically manipulated liquid aerosols

We report lasing in airborne, rhodamine B-doped glycerol-water droplets with diameters ranging between 7.7 and 11.0 mu m, which were localized using optical tweezers. While being trapped near the focal point of an infrared laser, the droplets were pumped with a Q-switched green laser. Our experiments revealed nonlinear dependence of the intensity of the droplet whispering gallery modes (WGMs) on the pump laser fluence, indicating dye lasing. The average wavelength of the lasing WGMs could be tuned between 600 and 630 nm by changing the droplet size. These results may lead to new ways of probing airborne particles, exploiting the high sensitivity of stimulated emission to small perturbations in the droplet laser cavity and the gain medium

Assessment of cerebral microbleeds by susceptibility-weighted imaging in Alzheimer's disease patients: A neuroimaging biomarker of the disease

Purpose The objective of this study was to correlate the presence and distribution of cerebral microbleeds in Alzheimer's disease patients with cerebrospinal fluid biomarkers (amyloid-beta and phosphorylated tau 181 protein levels) and cognitive decline by using susceptibility-weighted imaging magnetic resonance sequences at 1.5 T. Material and methods Fifty-four consecutive Alzheimer's disease patients underwent brain magnetic resonance imaging at 1.5 T to assess the presence and distribution of cerebral microbleeds on susceptibility-weighted imaging images. The images were analyzed in consensus by two neuroradiologists, each with at least 10 years' experience. Dementia severity was assessed with the Mini-Mental State Examination score. A multiple regression analysis was performed to assess the associations between the number and location of cerebral microbleed lesions with the age, sex, duration of the disease, cerebrospinal fluid amyloid-beta and phosphorylated tau 181 protein levels, and cognitive functions. Results A total of 296 microbleeds were observed in 54 patients; 38 patients (70.4%) had lobar distribution, 13 patients (24.1%) had non-lobar distribution, and the remaining three patients (5.6%) had mixed distribution, demonstrating that Alzheimer's disease patients present mainly a lobar distribution of cerebral microbleeds. The age and the duration of the disease were correlated with the number of lobar cerebral microbleeds (P < 0.001). Cerebrospinal fluid amyloid-beta, phosphorylated tau 181 protein levels, and cognitive decline were correlated with the number of lobar cerebral microbleeds in Alzheimer's disease patients (P < 0.001). Conclusion Lobar distribution of cerebral microbleeds is associated with Alzheimer's disease and the number of lobar cerebral microbleeds directly correlates with cerebrospinal fluid amyloid-beta and phosphorylated tau 181 protein levels and with the cognitive decline of Alzheimer's disease patients

Modeling and performance assessment of the split-pi used as a storage converter in all the possible dc microgrid scenarios. Part i: Theoretical analysis

The integration of an electrical storage system (ESS) into a DC microgrid using a bidirectional DC/DC converter provides substantial benefits but requires careful design. Among such converter topologies, the Split-pi converter presents several merits at the cost of non-isolated operation. However, the few works in the literature on the Split-pi presented only closed-loop control with a single control loop; furthermore, they neglected the reactive components’ parasitic resistances and did not perform any experimental validation. This work aimed at investigating the use of the Split-pi converter as a power interface between an ESS and a DC microgrid. Five typical microgrid scenarios are presented, where each of which requires a specific state-space model and a suitable control scheme for the converter to obtain high performance. In this study, two different state-space models of the converter that consider the parasitic elements are presented, the control schemes are discussed, and criteria for designing the controllers are also given. Several simulations, as well as experimental tests on a prototype realized in the lab, were performed to validate the study. Both the simulation and experimental results will be presented in part II of this work. The proposed approach has general validity and can also be followed when other bidirectional DC/DC converter topologies are employed to interface an ESS with a DC microgrid

Modeling and Experimental Validation of a Voltage-Controlled Split-Pi Converter Interfacing a High-Voltage ESS with a DC Microgrid

The Split-pi converter can suitably interface an energy storage system (ESS) with a DC microgrid when galvanic isolation is not needed. Usually, the ESS voltage is lower than the grid-side voltage. However, limitations in terms of the ESS current make the use of a high-voltage ESS unavoidable when high power levels are required. In such cases, the ESS voltage can be higher than the microgrid voltage, especially with low microgrid voltages such as 48 V. Despite its bidirectionality and symmetry, the Split-pi exhibits a completely different dynamic behavior if its input and output ports are exchanged. Thus, the present work aims to model the Split-pi converter operating with an ESS voltage higher than the grid-side voltage in three typical microgrid scenarios where the controlled variable is the converter's output voltage. The devised state-space model considers the parasitic elements and the correct load model for each scenario. Furthermore, it is shown that the presence of the input LC filter can make the design of the loop controllers more complicated than in the case of a lower ESS voltage than the grid-side voltage. Finally, the study is validated through simulations and experimental tests on a lab prototype, and a robustness analysis is performed

Modeling and performance assessment of the split-pi used as a storage converter in all the possible dc microgrid scenarios. Part II: Simulation and experimental results

Bidirectional DC/DC converters such as the Split-pi can be used to integrate an energy storage system (ESS) into a DC microgrid providing manifold benefits. However, this integration deserves careful design because the ESS converter must behave like a stiff voltage generator, a non-stiff voltage generator, or a current generator depending on the microgrid configuration. Part I of this work presented a comprehensive theoretical analysis of the Split-pi used as an ESS converter in all the possible DC microgrid scenarios. Five typical microgrid scenarios were identified. Each of them required a specific state-space model of the Split-pi and a suitable control scheme. The present paper completes the study validating the theoretical analysis based on simulations and experimental tests. The chosen case study encompassed a 48 V, 750 W storage system interfaced with a 180 V DC microgrid using a Split-pi converter. It can represent a reduced-power prototype of terrestrial and marine microgrids. A prototypal Split-pi converter was realized in the lab, and several experimental tests were performed to assess the performance in each scenario. The results obtained from the experimental tests were coherent with the simulations and validated the study