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            Engineering Letters 
              
            Objectives and Scope 
            Engineering Letters is published with both online and print versions. 
              The journal covers the frontier issues in the engineering and the 
              computer science and their applications in business, industry and 
              other subjects. The computer science is a branch of engineering 
              science that studies computable processes and structures. It contains 
              theories for understanding computing systems and methods; computational 
              algorithms and tools; methodologies for testing of concepts. The 
              subjects covered by the journal include artificial intelligence, 
              bioinformatics, computational statistics, database, data mining, 
              financial engineering, hardware systems, imaging engineering, industrial 
              engineering, internet computing, networking, operations research, 
              scientific computing, software engineering, and their applications 
              etc. 
            Printed copies of the journal are distributed to accredited universities 
              and government libraries. All the papers in the journal are also 
              available freely with online full-text content and permanent worldwide 
              web link. The abstracts will be indexed and available at major academic 
              databases. 
            ISSN: 1816-0948 (online version); 1816-093X (print 
            version) 
            Subject Category: Computer science and engineering 
            Published by: International Association of Engineers 
              
Contents: Volume 25 Issue 4 (Online version available: 17 November 2017) 
  
JOURNAL PAPERS: 
The Effect of Screen Size and Interaction Style on Mobile Device Usability 
Restyandito, and Erick Kurniawan 
Engineering Letters, 25:4, pp354-359 [Online Full Text] 
Restyandito, and Erick Kurniawan, "The Effect of Screen Size and Interaction Style on Mobile Device Usability," Engineering Letters, vol. 25, no.4, pp354-359, 2017
   
Fingerprint Spoof Detection Using Gradient Co-occurrence Matrix 
Xin Liu, and Yujia Jiang 
Engineering Letters, 25:4, pp360-365 [Online Full Text] 
Xin Liu, and Yujia Jiang, "Fingerprint Spoof Detection Using Gradient Co-occurrence Matrix," Engineering Letters, vol. 25, no.4, pp360-365, 2017
   
Relation between BMI and Exit Time of a Building in an Emergency Situation: Earthquake 
Washington Velasquez, Andres Munoz-Arcentales, and Joaquin Salvachua 
Engineering Letters, 25:4, pp366-381 [Online Full Text] 
Washington Velasquez, Andres Munoz-Arcentales, and Joaquin Salvachua, "Relation between BMI and Exit Time of a Building in an Emergency Situation: Earthquake," Engineering Letters, vol. 25, no.4, pp366-381, 2017
   
Model Analysis on Hydrogen Production by Hybrid system of SOEC and Solar Energy 
Yuzheng Lu, Junjiao Li, Loembe Souamy, Jun Wang, Yaoming Zhang, and Bin Zhu 
Engineering Letters, 25:4, pp382-388 [Online Full Text] 
Yuzheng Lu, Junjiao Li, Loembe Souamy, Jun Wang, Yaoming Zhang, and Bin Zhu, "Model Analysis on Hydrogen Production by Hybrid system of SOEC and Solar Energy," Engineering Letters, vol. 25, no.4, pp382-388, 2017
   
Script Identification of Central Asian Printed Document Images based on Nonsubsampled Contourlet Transform 
Xing-kun Han, Alimjan Aysa, Hornisa Mamt, and Kurban Ubul 
Engineering Letters, 25:4, pp389-395 [Online Full Text] 
Xing-kun Han, Alimjan Aysa, Hornisa Mamt, and Kurban Ubul, "Script Identification of Central Asian Printed Document Images based on Nonsubsampled Contourlet Transform," Engineering Letters, vol. 25, no.4, pp389-395, 2017
   
THGOR: Two-Hop Geographic Opportunistic Routing in WSNs 
Venkatesh, Akshay A L, Kushal P, K R Venugopal, L M Patnaik, and S S Iyengar 
Engineering Letters, 25:4, pp396-405 [Online Full Text] 
Venkatesh, Akshay A L, Kushal P, K R Venugopal, L M Patnaik, and S S Iyengar, "THGOR: Two-Hop Geographic Opportunistic Routing in WSNs," Engineering Letters, vol. 25, no.4, pp396-405, 2017
   
Boosting Based Ontology Sparse Vector Computation Approach 
Linli Zhu, Yu Pan, Muhammad Kamran Jamil, and Wei Gao 
Engineering Letters, 25:4, pp406-415 [Online Full Text] 
Linli Zhu, Yu Pan, Muhammad Kamran Jamil, and Wei Gao, "Boosting Based Ontology Sparse Vector Computation Approach," Engineering Letters, vol. 25, no.4, pp406-415, 2017
   
On the Interaction of Temperature and Magnetic Field in Electromechanical Energy Converters with Permanent Magnets 
Flur R. Ismagilov, Viacheslav E. Vavilov, Ilnar I. Yamalov, and Vladimir I. Bekuzin 
Engineering Letters, 25:4, pp416-423 [Online Full Text] 
Flur R. Ismagilov, Viacheslav E. Vavilov, Ilnar I. Yamalov, and Vladimir I. Bekuzin, "On the Interaction of Temperature and Magnetic Field in Electromechanical Energy Converters with Permanent Magnets," Engineering Letters, vol. 25, no.4, pp416-423, 2017
   
A Cumulative Error Suppression Method for UAV Visual Positioning System based on Historical Visiting Information 
Ye Chen, RuHui Huang, and Yi Zhu 
Engineering Letters, 25:4, pp424-430 [Online Full Text] 
Ye Chen, RuHui Huang, and Yi Zhu, "A Cumulative Error Suppression Method for UAV Visual Positioning System based on Historical Visiting Information," Engineering Letters, vol. 25, no.4, pp424-430, 2017
   
Discrete-Time Noise-Suppressing Zhang Neural Network for Dynamic Quadratic Programming with Application to Manipulators 
Bolin Liao, and Qiuhong Xiang 
Engineering Letters, 25:4, pp431-437 [Online Full Text] 
Bolin Liao, and Qiuhong Xiang, "Discrete-Time Noise-Suppressing Zhang Neural Network for Dynamic Quadratic Programming with Application to Manipulators," Engineering Letters, vol. 25, no.4, pp431-437, 2017
   
Adaptive Complex Modified Projective Synchronization of Two Fractional-order Complex-variable Chaotic Systems with Unknown Parameters 
Xiaomin Tian, and Zhong Yang 
Engineering Letters, 25:4, pp438-445 [Online Full Text] 
Xiaomin Tian, and Zhong Yang, "Adaptive Complex Modified Projective Synchronization of Two Fractional-order Complex-variable Chaotic Systems with Unknown Parameters," Engineering Letters, vol. 25, no.4, pp438-445, 2017
   
The Effect of Moisture Content, Temperature and Variety on Specific Heat of Edible-Wild Mushrooms: Model Construction and Analysis 
Soraya Saenmuang, Arpassorn Sirijariyawat, and Nattapol Aunsri 
Engineering Letters, 25:4, pp446-454 [Online Full Text] 
Soraya Saenmuang, Arpassorn Sirijariyawat, and Nattapol Aunsri, "The Effect of Moisture Content, Temperature and Variety on Specific Heat of Edible-Wild Mushrooms: Model Construction and Analysis," Engineering Letters, vol. 25, no.4, pp446-454, 2017
   
The Effect of Natural Sounds and Music on Driving Performance and Physiological 
Arafat Febriandirza, Wu Chaozhong, Ming Zhong, Zhaozheng Hu, and Hui Zhang 
Engineering Letters, 25:4, pp455-463 [Online Full Text] 
Arafat Febriandirza, Wu Chaozhong, Ming Zhong, Zhaozheng Hu, and Hui Zhang, "The Effect of Natural Sounds and Music on Driving Performance and Physiological," Engineering Letters, vol. 25, no.4, pp455-463, 2017
   
A Sliding Mode Controller based on Backstepping for Manipulator 
Haitao Zhang, Xiaofeng Liu, and Guifang Wu 
Engineering Letters, 25:4, pp464-473 [Online Full Text] 
Haitao Zhang, Xiaofeng Liu, and Guifang Wu, "A Sliding Mode Controller based on Backstepping for Manipulator," Engineering Letters, vol. 25, no.4, pp464-473, 2017
   
Fault Diagnosis Strategy of Polymerization Kettle Equipment Based on Support Vector Machine and Cuckoo Search Algorithm 
Shuo Wen, Jie-Sheng Wang, and Jie Gao 
Engineering Letters, 25:4, pp474-482 [Online Full Text] 
Shuo Wen, Jie-Sheng Wang, and Jie Gao, "Fault Diagnosis Strategy of Polymerization Kettle Equipment Based on Support Vector Machine and Cuckoo Search Algorithm," Engineering Letters, vol. 25, no.4, pp474-482, 2017
   
            
              
              
            Coming Special Issues of Engineering Letters 
            Engineering Letters welcomes author submission of papers concerning 
              any branch of the engineering and the computer science and their 
              applications in business, industry and other subjects. The subjects 
              covered by the journal include artificial intelligence, bioinformatics, 
              computational statistics, database, data mining, financial engineering, 
              hardware systems, imaging engineering, industrial engineering, internet 
              computing, networking, operations research, scientific computing, 
            software engineering, and their applications. With the efforts of the Editorial Board Members of  Engineering Letters, the new online version and print version of the journal Engineering  Letters has become available to the general public, instead of its old  restricted versions. 
            All submitted papers are to be peer-reviewed for ensuring their 
              qualities. 
               
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