Yazar "Gunduz, Selim" seçeneğine göre listele

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    A New Unit Distribution Based On The Unbounded Johnson Distribution Rule: The Unit Johnson SU Distribution
    (Univ Punjab, 2020) Gunduz, Selim; Korkmaz, Mustafa C.
    This paper proposes a new probability distribution, which belongs a member of the exponential family, defined on (0,1) unit interval. The new unit model has been defined by relation of a random variable defined on unbounded interval with respect to standard logistic function. Some basic statistical properties of newly defined distribution are derived and studied. The different estimation methods and some inferences for the model parameters have been derived. We assess the performance of the estimators of these estimation methods based on the three different simulation scenarios. The analysis of three real data examples which one is related to the coronavirus data, show better fit of proposed distribution than many known distributions on the unit interval under some comparing criteria.
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    Determination of Wind Potential by Two Components Mixture Probability Distribution Models in the Ankara, Turkey
    (Int Journal Renewable Energy Research, 2020) Servi, Tayfun; Gunduz, Selim; Erisoglu, Ulku; Yalcin, Levent
    In this study, hourly average wind speed data in the Ankara, Turkey are modeled with Weibull, Gamma and Rayleigh probability distribution and theirs two component mixture probability distributions. Expectation-Maximization (EM) algorithm is introduced for Maximum Likelihood Estimation (MLE) of mixture probability distributions used in modeling wind speed data. In comparing the modeling performances of probability distributions, the Akaike information criteria, the coefficient of determination, the root of the mean squares and chi-square criteria were used as comparison criteria. Also, in this study, the success in estimation of wind potential was evaluated with relative error. In the study results, it was observed that the mixture distribution models obtained from two different distributions were more successful in modeling wind speed data. The results obtained from the study revealed that the wind potential of Kecioren/Baglum region is higher than Cankaya/Caldag region. According to the wind speed data observed in Kecioren/Baglum and Cankaya/Caldag regions, wind power densities per unit area were calculated as 153.926 W/m(2), and 62.785 W/m(2), respectively.
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    Öğe
    Satisfaction Levels of Cooperative Partners in The New World Order: Case of Cukobirlik
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2021) Haseki, Murat Ismet; Gunduz, Selim; Dolekoglu, Celile Ozcicek
    The continuity of the organizations is directly proportional to the satisfaction of the service recipients. The presence of many partners, beneficiaries and employees in cooperatives requires high cooperation. Therefore, it is important to reveal the service quality of the cooperatives and to determine the expectations of the partners. This study was carried out in Cukobirlik, which ranks third in Turkey cooperatives and first among the agricultural cooperatives in terms of number of partners, with the aim of determining the partners' service satisfaction, their perception related to cooperative activities and their intentions for diversification of these activities. 831 surveys were applied. 94.8% of the participants in the study are men and the agricultural production experience of 76.4% of them is over 21 years. It was seen that the satisfaction level of the partners from Cukobirlik's services is high in all dimensions, and the dimensions of assurance, competency and enthusiasm came to the fore compared to other dimensions. With the global pandemic of Covid-19, it has once again manifested itself that agricultural production is an activity that is the first and most affected by all extraordinary situations and affects all humanity with its results. The collective production model is a guarantee of sustainability.
  • [ X ]
    Öğe
    Satisfaction Levels of Cooperative Partners in The New World Order: Case of Cukobirlik
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2021) Haseki, Murat Ismet; Gunduz, Selim; Dolekoglu, Celile Ozcicek
    The continuity of the organizations is directly proportional to the satisfaction of the service recipients. The presence of many partners, beneficiaries and employees in cooperatives requires high cooperation. Therefore, it is important to reveal the service quality of the cooperatives and to determine the expectations of the partners. This study was carried out in Cukobirlik, which ranks third in Turkey cooperatives and first among the agricultural cooperatives in terms of number of partners, with the aim of determining the partners' service satisfaction, their perception related to cooperative activities and their intentions for diversification of these activities. 831 surveys were applied. 94.8% of the participants in the study are men and the agricultural production experience of 76.4% of them is over 21 years. It was seen that the satisfaction level of the partners from Cukobirlik's services is high in all dimensions, and the dimensions of assurance, competency and enthusiasm came to the fore compared to other dimensions. With the global pandemic of Covid-19, it has once again manifested itself that agricultural production is an activity that is the first and most affected by all extraordinary situations and affects all humanity with its results. The collective production model is a guarantee of sustainability.