2024-03-29T05:01:31Zhttp://i-rep.emu.edu.tr:8080/oai/request
oai:i-rep.emu.edu.tr:11129/11192016-02-04T07:28:27Zhdl_11129_817
EMU I-REP
author
Uyguroğlu, Mustafa
author
Demirel, Hasan
2013-10-01T08:38:31Z
2013-10-01T08:38:31Z
2005-06
Uyguroglu, Mustafa, Demirel, Hasan (2005). TSAI–TOKAD (T–T) Graph: The Combination of Non-Oriented and Oriented Graphs for the Kinematics of Articulated Gear Mechanisms. Meccanica, 40 (3), 223-232.
Online: 1572-9648
Print: 0025-6455
DOI: 10.1007/s11012-005-4023-8
http://hdl.handle.net/11129/1119
http://dx.doi.org/10.1007/s11012-005-4023-8
Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI (with DOI: 10.1007/s11012-005-4023-8) and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
ABSTRACT : The non-oriented and oriented linear graph techniques are used for the kinematic analysis of bevel-gear trains. In this paper, these two techniques are compared and the weaknesses of each technique are shown. In order to overcome the weaknesses of these techniques a new graphical technique called Tsai–Tokad (T–T) graph is introduced incorporating the important feature of the non-oriented graph which helps to determine the transfer vertex and the oriented graph technique. The theory is demonstrated by the kinematic analysis of articulated robotic mechanism used by Cincinnati Milacron T³.
en
Meccanica: An International Journal of Theoretical and Applied Mechanics, AIMETA / Springer
© Springer 2005
info:eu-repo/semantics/closedAccess
info:eu-repo/semantics/closedAccess
Geared Wrist Manipulators - Kinematic Analysis - Mechanics of Machines - Oriented and Non-Oriented Graphs
Mechanical Engineering - Mechanics
TSAI–TOKAD (T–T) Graph: The Combination of Non-Oriented and Oriented Graphs for the Kinematics of Articulated Gear Mechanisms
article
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oai:i-rep.emu.edu.tr:11129/11702016-01-06T08:13:48Zhdl_11129_817hdl_11129_1172
EMU I-REP
author
Bayraktar, Fatih
author
Amca, Hasan
2013-10-07T11:08:10Z
2013-10-07T11:08:10Z
2012-05-01
Bayraktar, Fatih, Amca Hasan (2012). Interrelations Between Virtual-World and Real-World Activities: Comparison of Genders, Age Groups,and Pathological and Nonpathological Internet Users. Cyberpsychology, Behavior, and Social Networking, 15 (5), pp. 263-269.
Print: 2152-2715
Online: 2152-2723
http://hdl.handle.net/11129/1170
The file in this item is the publisher version (published version) of the article.
ABSTRACT: After the Internet Revolution, people have started to spend most of their everyday time online carrying out
virtual activities. A limited number of studies tried to answer whether virtual activities match our real-world
(RW) activities. Moreover, to our knowledge, there was no study that dealt with these interrelations between
virtual and RW activities among the pathological and nonpathological users of the Internet (i.e. PIUs and
NPIUs). The primary aim of this study was to fill this gap and to investigate the correlations between virtualworld
(VW) and RW activities among PIUs and NPIUs. The secondary aim was to examine the perceptions of
the Internet and motivations to go online for PIUs and NPIUs. The third aim was to compare virtual and RW
activities across gender and age groups. The results indicated that correlations between most of the activities in
RW and VW were high among men and women, among age groups, and also among PIUs and NPUs. However,
beyond these similarities, perceptions of the Internet and motivations to browse into VW were differed among
PIUs and NPIUs. In other words, PIUs, but not NPIUs, perceived VW activities more gratified and had motivations
to go online for gratified functions.
en
CyberPsychology, Behavior & Social Networking / Mary Ann Liebert, Inc. Publishers
Internet - Interpersonal Relations
Internet Users - Behavior, Addictive - Motivation - Psychology
Adolescent - Adult - Age Factors - Female - Humans - Male - Questionnaires - Sex Factors - User-Computer Interface
Interrelations Between Virtual-World and Real-World Activities: Comparison of Genders, Age Groups,and Pathological and Nonpathological Internet Users
Article
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URL
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oai:i-rep.emu.edu.tr:11129/20592016-02-04T07:18:40Zhdl_11129_1952hdl_11129_817
EMU I-REP
author
Amca, Hasan
author
Rızaner, Ahmet
author
Hacıoğlu, Kadri
author
Ulusoy, Ali Hakan
2016-02-04T07:13:53Z
2016-02-04T07:13:53Z
2006-01
Hasan Amca, Ahmet Rizaner, Kadri Hacıoğlu, Ali H. Ulusoy, (2006)"Training Sequence Aided Signature Waveform Estimation", Wireless Personal Communications, 36:(1) 45–57.
1572-834X (online)
0929-6212 (print)
DOI: 10.1007/s11277-006-7533-3
http://dx.doi.org/10.1007/s11277-006-7533-3
http://hdl.handle.net/11129/2059
Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI (with DOI: 10.1007/s11012-005-4023-8) and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
In code division multiple access channels multiuser detection techniques are known to be effective strategies
to counter the presence of multiuser interference towards improving spectral efficiency. Generally, multiuser
detectors can provide excellent performance only when the signature waveforms† of all users are precisely known.
Hence, the estimation of signature waveforms is a challenging issue in mobile communication systems. In this
paper, we compare the performance of two short training sequence aided signature waveform estimators. One
is maximum likelihood type signature waveform estimator that requires the knowledge of spreading sequences
and short training sequences. The other estimator is recently proposed based on subspace method and requires
the knowledge of training sequences only. Through the simulations, we show the signature waveform estimation
performance of both systems and the effect of the estimation error on the performance of a multiuser detector. The
complexity comparisons of both systems are also given.
en
Wireless Personal Communications, Springer
CDMA
multipath channel
signature waveform estimation
Training Sequence Aided Signature Waveform Estimation
Article
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oai:i-rep.emu.edu.tr:11129/20612016-02-04T13:35:47Zhdl_11129_1949hdl_11129_1952hdl_11129_817
EMU I-REP
author
Rızaner, Ahmet
author
Ulusoy, Ali Hakan
author
Amca, Hasan
author
Hacıoğlu, Kadri
2016-02-04T13:32:07Z
2016-02-04T13:32:07Z
2011-11
Ahmet Rızaner, Ali Hakan Ulusoy, Hasan Amca, Kadri Hacıoğlu (2011) "An adaptive least squares channel estimation based on conjugate gradient approach for multipath fading CDMA systems" Computers & Electrical Engineering Volume 37, Issue 6, Pages 1082–1089 .
0045-7906
DOI: 10.1016/j.compeleceng.2011.07.003Ş
http://dx.doi.org/doi:10.1016/j.compeleceng.2011.07.003
http://hdl.handle.net/11129/2061
Du to copyright restirctions,the access to teh publisher version (publishe version)of this article is only available via subscription. You may clik URI (with DOI:10.1016/j.compeleceng.2011.07.003)and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
Publisher Version (Published Version).
Multiple access interference (MAI) is the main factor affecting the performance of channel estimation techniques for code division multiple access (CDMA) systems. Although, several multi-user channel estimation algorithms have been proposed to mitigate MAI, these algorithms require high computational complexities. In this paper, we address the problem of iterative least squares (LS) mobile channel estimation at high channel efficiency that requires a short training sequence along with the spreading sequences. We employ an efficient iterative method based on conjugate gradient (CG) algorithm to reduce the computational complexity of the estimation method. Computer simulations illustrate that the proposed method performs almost identical to the exact LS estimate for reasonable training lengths.
en
Computers & Electrical Engineering, Elsevier
info:eu-repo/semantics/closedAccess
multiple access interference
channel estimation techniques
mobile channel estimation
power updates in wireless CDMA systems
An adaptive least squares channel estimation based on conjugate gradient approach for multipath fading CDMA systems
Article
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oai:i-rep.emu.edu.tr:11129/21652016-02-29T12:45:01Zhdl_11129_817
EMU I-REP
author
Hüseyin, Bilgekul
author
Amca, Hasan
2016-02-29T12:43:33Z
2016-02-29T12:43:33Z
1996-10
Huseyin Bilgekul and Hasan Amca,Multicarrier Transmission Using Quadrature frequency/Phase Modulation, Electronics Letters, Vol.32, No.22, pp.2051-2053, Oct. 1996.
1350-911X (online)
0013-5194 (print)
DOI: 10.1049/el:19961386
http://dx.doi.org/10.1049/el:19961386
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=543808
http://hdl.handle.net/11129/2165
Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI (with DOI: 10.1049/el:19961386) and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
Multicarrier (MC) systems using quadrature frequency and phase modulation (QFPM) schemes called MC-QFPM are described. In MC-QFPM systems, the power efficiency and resistance lo dehy
spread can be increased for the price of reduced bandwidth cffkiency. M-ary orthogonal frequency-shift-keying with M = I, 2 and 4 are considered along with MC modulation. The BER performance of MC-QFPM schemes in frequency selective delay
spread environments is examined and compared
eng
Electronics Letters
10.1049/el:19961386
info:eu-repo/semantics/openAccess
modulation
frequency modulation
phase modulation
delays
digital communications
error statistics
frequency shift keying
quadrature phase shift keying
Multicarrier transmission using quadrature frequency/phase modulation
article
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oai:i-rep.emu.edu.tr:11129/28902016-08-19T06:12:12Zhdl_11129_787hdl_11129_817hdl_11129_781
EMU I-REP
author
Garip, Mehmet U.
author
Erdil, Erzat
author
Bilsel, Ayhan
2016-08-19T06:12:12Z
2016-08-19T06:12:12Z
2006
M. Garip, E. Erdil& A. Bilsel; “Engineering Faculty Attitudes to General Chemistry Courses in Engineering Curricula”,
JOURNAL OF CHEMICAL EDUCATION 83(12): 1873-1878 2006
0021-9584(print)
1938-1328(online)
http://eric.ed.gov/?id=EJ755014
http://hdl.handle.net/11129/2890
Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
A survey on the attitudes of engineering faculty to chemistry, physics, and mathematics was conducted with the aim of clarifying the attitudes of engineering faculty to chemistry courses in relation to engineering education or curricula and assessing their expectations. The results confirm that on the whole chemistry is perceived as having a legitimate place as a core course in engineering curricula with frequently appearing comments from faculty to make chemistry relevant to real-life problems and everyday applications.
eng
Amer Chemical Soc
info:eu-repo/semantics/embargoedAccess
CHEMISTRY
MULTIDISCIPLINARY, EDUCATION
SCIENTIFIC DISCIPLINES, Engineering Education
Engineering faculty attitudes to general chemistry courses in engineering curricula
article
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oai:i-rep.emu.edu.tr:11129/30992016-11-18T00:00:39Zhdl_11129_817hdl_11129_2199hdl_11129_826
EMU I-REP
author
Nevzat, Raziye
author
Amca, Yılmaz
author
Tanova, Cem
author
Amca, Hasan
2016-11-17T06:55:34Z
2016-11-17T06:55:34Z
2016-09-20
0747-5632
http://dx.doi.org/10.1016/j.chb.2016.09.018
http://hdl.handle.net/11129/3099
The file in this item is the pre-print version of the article (author’s copy; unrefereed Author’s Version). Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
As the increasing internationalization of higher education creates competition among the universities, many institutions are making use of social media communities to attract and retain students. We surveyed 206 users of a university Facebook page to investigate how it may be related to their identification with the university community and the university brand. We further investigate how this identification is associated with the trust and loyalty to the institution and is likely to be linked to positive behaviors such as promoting the university to their peers as an active member of the university community. Our results show that the perceived strength of the Facebook community is related to the identification with the university community and the university brand which in turn are related to trust and loyalty. Higher loyalty is linked to citizenship behaviors such as increased contribution to the educational process labeled in-role behaviors and providing positive word of mouth about the university labeled extra-role behaviors. With the challenges of a diverse and global student body which is expected to continue increasing, universities can benefit from use of social media in developing identity, loyalty and trust.
eng
Elsevier
10.1016/j.chb.2016.09.018
info:eu-repo/semantics/openAccess
Internationalization of higher education
Organizational identification
Brand identification
Loyalty
Trust
Citizenship behaviors
Role of social media community in strengthening trust and loyalty for a university
article
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RaziyeNevzatYilmazAmca.pdf.txt
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RaziyeNevzatYilmazAmca.pdf
oai:i-rep.emu.edu.tr:11129/34372017-10-23T08:04:58Zhdl_11129_817
EMU I-REP
author
Rızaner, Ahmet
author
Ulusoy, Hakan A.
2017-10-23T08:04:58Z
2017-10-23T08:04:58Z
2011
http://dx.doi.org/10.1007/s12243-010-0212-0
http://hdl.handle.net/11129/3437
The file in this item is the post-print version of the article (author’s copy; author’s final manuscript, accepted for publication after peer-review process). Due to copyright restrictions, the access to the publisher version (published version) of this article is only available via subscription. You may click URI and have access to the Publisher Version of this article through the publisher web site or online databases, if your Library or institution has subscription to the related journal or publication.
This paper proposes a novel radial basis function assisted adaptive path selective decorrelating detector for direct sequence code division multiple access systems with time-varying multipath fading channels under impulsive noise. The proposed detector combines adaptive path selective decorrelating detector (APSDD) with a radial basis function (RBF) network to eliminate the effect of impulsive noise. Simulation results clearly show that the proposed detector eliminates the effect of impulsive noise and improves the performance of APSDD under high impulsive noise.
eng
Springer-Verlag
10.1007/s12243-010-0212-0
info:eu-repo/semantics/closedAccess
Impulsive noise, Communications Engineering, Networks, Information Systems and Communication Service,
Image and Speech Processing, R & D/Technology Policy, Decorrelating detector, Radial basis function, Information and Communication, Circuits, Engineering, Computer Communication Networks, Adaptive path selection, CDMA, CHANNEL, TELECOMMUNICATIONS, MULTIUSER DETECTION, Neural networks, CDMA technology, Detectors
RBF network assisted adaptive path selective decorrelating detector under impulsive noise for multipath fading CDMA systems
article
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