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Search Results: 1 - 10 of 153 matches for " Rafki Hidayat "
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A Risk Model on the Weekend's Returns of the U.S. Movie Industry
Novriana Sumarti,Rafki Hidayat
Lecture Notes in Engineering and Computer Science , 2011,
Abstract:
A Financial Risk Analysis: Does the 2008 Financial Crisis Give Impact on Weekend's Returns of the U.S. Movie Box Office?
Novriana Sumarti,Rafki Hidayat
IAENG International Journal of Applied Mathematics , 2011,
Abstract:
A Financial Risk Analysis: Does the 2008 Financial Crisis Give Impact on Weekends Returns of the U.S. Movie Box Office?
Novriana Sumarti,Rafki Hidayat
Quantitative Finance , 2013,
Abstract: The Financial Crisis of 2008 is a worldwide financial crisis causing a worldwide economic decline that is the most severe since the 1930s. According to the International Monetary Fund (IMF), the global financial crisis gave impact on USD 3.4 trillion losses from financial institutions around the world between 2007 and 2010. Does the crisis give impact on the returns of the U.S. movie Box Office? It will be answered by doing an analysis on the financial risk model based on Extreme Value Theory (EVT) and calculations of Value at Risk (VaR) and Expected Shortfall (ES). The values of VaR and ES from 2 periods, 1982 to 1995 and 1996 to 2010, are compared. Results show that the possibility of loss for an investment in the movie industry is relatively lower than the possibility of gain for both periods of time. The values of VaR and ES for the second period are higher than the first period. We are able to conclude that the 2008 financial crisis gave no significant effect on these measurement values in the second period. This result describes the high potential opportunity in the investment of the U.S. movie makers.
The Effect of Realistic Mathematic Education on Students’ Conceptual Understanding of Linear Progamming  [PDF]
Riyan Hidayat, Zanaton H. Iksan
Creative Education (CE) , 2015, DOI: 10.4236/ce.2015.622251
Abstract: A number of national and international scale surveys showed that the mathematics achievements of Indonesian secondary school students were in the lower level. One of the indicators of this low achievement was the insufficient level of understanding of mathematical concepts of the students. Understanding of mathematical concepts could be integrated through Realistic Mathematics Education (RME). Therefore, the quasi-experimental study was conducted to examine the effectiveness of Realistic Mathematical Education towards the conceptual understanding of linear programming. The study also investigated the relationship between conceptual understanding and mathematics achievement and investigated the misconceptions on linear programming. This study involved 65 students of Madrasah Aliyah Negeri 1 Pekanbaru, Indonesia. Test conceptual understanding programming topics had Cronbach’s alpha reliability of 0.80. The data were collected by using a test question conceptual understanding of linear programming. Quantitative data analysis involved a descriptive and inferential analysis using SPSS 21.0. The descriptive analysis included the percentage, mean and standard deviation while inferential analysis involving independent t-test and Pearson correlation analysis. The results revealed that there were significant differences between the treatment and control groups toward conceptual understanding. There was a significant relationship between conceptual understanding and mathematics achievement of linear programming. Misconception toward linear programming for the treatment group was lower than the control group. The implications of this study were useful for educators to help their students to understand concept of mathematics through open and contextual questions so that the students though through the mathematics, not worked in the mathematics.
Mathematical Modelling Competency for Indonesian Students in Mathematics Education Programmes  [PDF]
Riyan Hidayat, Zanaton H. Iksan
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.915187
Abstract: Previous studies have documented that students have difficulties in mathematical modeling competency. The current research is an attempt to investigate the issue of student’s mathematical modeling competency in pre-service mathematics teacher in Indonesia and its analysis in term of Cumulative Grade Points Average (CGPA) gap in Riau Province,?Indonesia. The research involved a total of 100 pre-service teacher students?in Universitas Islam Riau?(UIR). A survey design was employed to investigate the students’ mathematical modeling competency using questionnaire of mathematical modeling test. The quantitative data were statistically analyzed using the SPSS 22.0. The descriptive analysis included the percentage, mean and standard deviation while inferential analysis involved Pearson correlation analysis. The results indicated that pre-service mathematics teacher education in Indonesia had moderate level of mathematical modeling competency. However, using graphical representation and interpreting and relating the mathematical solution to the real world context are the most two difficulties in mathematical modeling. At the same time, there was not a significant relationship between CGPA and mathematical modeling competency.
Are there differences between unconditional and conditional demand estimates? implications for future research and policy
Budi Hidayat
Cost Effectiveness and Resource Allocation , 2008, DOI: 10.1186/1478-7547-6-15
Abstract: The demand for outpatient care in three alternative providers was modeled using a multinomial logit regression for samples unconditional on being ill (N = 16485) and conditional on being ill (N = 5055). The ill sample was constructed from two measures of health status – activity of daily living impairments and severity of illness – derived from the second round of panel data from the Indonesian Family Life Survey. The recycling prediction method was used to predict the distribution of utilization rates based on having health insurance and income status, while holding all other variables constant.Both unconditional and conditional estimates yield similar results in terms of the direction of the most covariates. The magnitude effects of insurance on healthcare demand are about 7.5% (public providers) and 20% (private providers) higher for unconditional estimates than for conditional ones. Further, exogenous variables in the former estimates explain a higher variation of the model than that in the latter ones. Findings confirm that health insurance has a positive impact on the demand for healthcare, with the highest effect found among the lowest income group.Conditional estimates do not suffer from statistical selection bias. Such estimates produce smaller demand effects for health insurance than unconditional ones do. Whether to rely on conditional or unconditional demand estimates depends on the purpose of study in question. Findings also demonstrate that health insurance programs significantly improve access to healthcare services, supporting the development of national health insurance programs to address under-utilization of formal healthcare in Indonesia.Several published studies on healthcare demand estimate the probabilities of using healthcare services conditional on being ill sample [1-4]. The ill sample is usually generated from self-assessments of health status. Conditional estimates are the preferred method because an individual's decision to seek treatmen
Pengaruh Kualitas Layanan, Kualitas Produk dan Nilai Nasabah Terhadap Kepuasan dan Loyalitas Nasabah Bank Mandiri
Rachmad Hidayat
Jurnal Manajemen dan Kewirausahaan , 2009,
Abstract: The objectives of this study is to measure customer level of satisfaction and loyalty toward banking service in East Java. This study is categorized as survey research with descriptive analysis method by taking sample from population and using questionnaire as the main data-collecting instrument. The population in this research is all customers of Mandiri Bank in East Java. The respondents are chosen by using probability sampling and systematic random sampling techniques. The research sample is chosen randomly for the first data whereas the following is using certain interval. The results of analysis using Structural Equation Modeling (SEM) model are: (1) Service quality has positive and significant influence on customer satisfaction. (2) Product quality has positive and significant influence on customer satisfaction. (3) Value for customer has positive and significant influence on customer satisfaction. (4) Customer satisfaction has positive, significant influence to customer loyalty. (5) Service quality has negative, significant influence on customer loyalty. (6) Product quality has negative, significant influence on customer loyalty. (7) Value for customer has positive, significant influence on customer loyalty. (8) Theoretical finding leading to the theory developed is service quality has negative, significant influence on customer loyalty. But significant influence on customer satisfaction. And product quality has negative, significant influence on customer loyalty. But positive, significant influence on customer loyalty mediated by customer satisfaction.
Analisis Komitmen (Affective, Continuance dan Normative) Terhadap Kualitas Pelayanan Pengesahan STNK Kendaraan Bermotor (Studi Empiris pada Kantor Bersama Samsat di Propinsi Kalimantan Timur)
Muchtar Hidayat
Jurnal Manajemen dan Kewirausahaan , 2010,
Abstract: Adopting an internal marketing approach, this study attempts to provide a deeper understanding of the organisational commitment – service quality relationship in the service context. This is done by empirically testing the relationships that the three components of organizational commitment (affective, continuance and normative) have with the service quality of customer-contact employees. The hypotheses were framed by critically reviewing the extant literature in the areas of services marketing and human resource management. A large sample comparative study was conducted on employees in Kantor Bersama Samsat Di Propinsi Kaltim. Study explore the important question of how the three components of organizational commitment influence the employee-perceived service quality differently in Kantor Bersama Samsat. The findings indicate that in Kantor Bersama Samsat, both affective commitment and continuance commitment have significant positive impact on service quality while in Kantor Bersama Samsat, only affective commitment is found to affect service quality significantly. Having established the commitment–service quality relationship, the implications for designing internal marketing strategies are further discussed.
The effect of pH on endo-1,4-b-glucanase activity from Bacillus sp. AR 009
IMAN HIDAYAT
Biodiversitas , 2005,
Abstract: The determinination of the suitable pH condition for maximizing the activity of endo-1,4- -glucanase of Bacillus sp. AR 009 had been done. The acidity range of media for examining the enzyme activities were 4, 5, 6, 7, 8, and 9 at 37°C. The experiments show that the value of maximum activity of endo-1,4- -glucanase was 23.068 U/mL at third day incubation with 124.565 mg/L of sugar reduction at pH 7.
Kasus HIV terkini
Saparudin Hidayat
HUMANITAS , 2012,
Abstract: Abstrak
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