Scopus İndeksli Yayınlar Koleksiyonu

Permanent URI for this collectionhttps://gcris.yasar.edu.tr/handle/123456789/11290

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Citation - WoS: 49
Citation - Scopus: 53
Advanced exergoeconomic evaluation of a heat pump food dryer
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2014) Zafer Erbay; Arif Hepbasli; Hepbasli, Arif; Erbay, Zafer
In this study the results of conventional and advanced exergoeconomic analyses of the performance of a pilot scale air-source heat pump food dryer were compared for the first time. The contributions of the components of the drying system to the exergetic cost effectiveness of the dryer were evaluated and the effects of changing the inlet drying temperature were determined. The most important system component was determined to be the heat recovery unit followed by the condenser with respect to the reducing potentials for the total costs of the overall system. Decreasing temperature caused an increase in the cost performance of drying. The modification of the system components for improving the efficiency of the system can be effectively determined through advanced exergoeconomic approach by stating the realistic potential improvements and the priorities in the system. (c) 2014 IAgrE. Published by Elsevier Ltd. All rights reserved.
Citation - WoS: 1
Citation - Scopus: 2
Multi-timescale boosting for efficient and improved event camera face pose alignment
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2023) Arman Savran; Savran, Arman
The success of event camera (EC) vision in certain types of applications has been steadily shown thanks to energy-efficient sparse sensing high dynamic range and extremely high temporal resolution. However the utilization of ECs for facial processing tasks has remained rather limited. To enable high energy efficiency for large face pose alignment which is a crucial facial pre-processing stage we aim at leveraging EC by effective adaptation of the processing rate proportional to facial movement intensity. For this purpose we propose a novel alternative to the commonly employed constant time frame and event count frame strategies which combines their advantages and provides the benefits of supervised learning. This is realized by a multi-timescale boosting framework that can generate highly sparse pose-events at a variable rate via detection-based online timescale selection. Although detectors of multiple scales with boosted sensitivities operate as a cascade our method provides minimal delay essential for real-time applications. Comprehensive evaluations show that the proposed multi-timescale processing substantially improves the performance-efficiency trade-off over singletimescale frames and markedly over event count frames. Mega-floating-point-operations-per-second ranges from 2.5 at the moderate motion clips to 6.5 at the intense motion clips with negligible computation in the absence of activity. Also alignment errors are considerably reduced by online selection of small timescales at fast head motion and of bigger timescales at slower motion or local activity of lips and eyes. Being orthogonal and complementary to spatial domain techniques the proposed approach can also be conveniently integrated with future advances for further performance/efficiency improvements or for alignment extensions.
Citation - WoS: 19
Citation - Scopus: 19
Rings and modules characterized by opposites of injectivity
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2014) Rafail Alizade; Engin Buyukasik; Noyan Er; Er, Noyan; Alizade, Rafail; Buyukasik, Engin
In a recent paper Aydogdu and Lopez-Permouth have defined a module M. to be N-subinjective if every homomorphism N -> M extends to some E(N) -> M where E(N) is the injective hull of N. Clearly every module is subinjective relative to any injective module. Their work raises the following question: What is the structure of a ring over which every module is injective or subinjective relative only to the smallest possible family of modules namely injectives? We show using a dual opposite injectivity condition that such a ring R is isomorphic to the direct product of a semisimple Artinian ring and an indecomposable ring which is (i) a hereditary Artinian serial ring with J(2) = 0, or (ii) a QF-ring isomorphic to a matrix ring over a local ring. Each case is viable and conversely (i) is sufficient for the said property and a partial converse is proved for a ring satisfying (ii). Using the above mentioned classification it is also shown that such rings coincide with the fully saturated rings of Trlifaj except possibly when von Neumann regularity is assumed. Furthermore rings and abelian groups which satisfy these opposite injectivity conditions are characterized.
Citation - WoS: 21
Citation - Scopus: 26
The volatility connectedness between agricultural commodity and agri businesses: Evidence from time-varying extended joint approach
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2023) Efe Caglar Cagli; Pinar Evrim Mandaci; Dilvin Taskin; Taskin, Dilvin; Mandaci, Pinar Evrim; Cagli, Efe Caglar
This paper investigates the volatility connectedness between ten major agribusiness common stock prices and various agricultural commodity prices between August 11 2005 and November 4 2022. We employ the time-varying parameter vector autoregressions (TVP-VAR) extended joint connectedness framework. The results show that agribusiness stocks are net volatility transmitters whereas agricultural commodities are net volatility receivers. The results provide significant implications for investors and policymakers concerned with commodity prices.

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