Guest editorial : In Journal of networks, v.7 n.3

Networking of computing devices has been going through rapid evolution and thus continuing to be an ever expanding area of importance in recent years. New technologies, protocols, services and usage patterns have contributed to the major research interests in this area of computer science. The current special issue is an effort to bring forward some of these interesting developments that are being pursued by researchers at present in different parts of the globe. Our objective is to provide the readership with some insight into the latest innovations in computer networking through this. This Special Issue presents selected papers from the thirteenth conference of the series (ICCIT 2010) held during December 23-25, 2010 at the Ahsanullah University of Science and Technology. The first ICCIT was held in Dhaka, Bangladesh, in 1998. Since then the conference has grown to be one of the largest computer and IT related research conferences in the South Asian region, with participation of academics and researchers from many countries around the world. Starting in 2008 the proceedings of ICCIT are included in IEEExplore. In 2010, a total of 410 full papers were submitted to the conference of which 136 were accepted after reviews conducted by an international program committee comprising 81 members from 16 countries. This was tantamount to an acceptance rate of 33%. From these 136 papers, 14 highly ranked manuscripts were invited for this Special Issue. The authors were advised to enhance their papers significantly and submit them to undergo review for suitability of inclusion into this publication. Of those, eight papers survived the review process and have been selected for inclusion in this Special Issue. The authors of these papers represent academic and/or research institutions from Australia, Bangladesh, Japan, Korea and USA. These papers address issues concerning different domains of networks namely, optical fiber communication, wireless and interconnection networks, issues related to networking hardware and software and network mobility. The paper titled “Virtualization in Wireless Sensor Network: Challenges and Opportunities” argues in favor of bringing in different heterogeneous sensors under a common virtual framework so that the issues like flexibility, diversity, management and security can be handled practically. The authors Md. Motaharul Islam and Eui-Num Huh propose an architecture for sensor virtualization. They also present the current status and the challenges and opportunities for further research on the topic. The manuscript “Effect of Polarization Mode Dispersion on the BER Performance of Optical CDMA” deals with impact of polarization mode dispersion on the bit error rate performance of direct sequence optical code division multiple access. The authors, Md. Jahedul Islam and Md. Rafiqul Islam present an analytical approach toward determining the impact of different performance parameters. The authors show that the bit error rate performance improves significantly by the third order polarization mode dispersion than its first or second order counterparts. The authors Md. Shohrab Hossain, Mohammed Atiquzzaman and William Ivancic of the paper “Cost and Efficiency Analysis of NEMO Protocol Entities” present an analytical model for estimating the cost incurred by major mobility entities of a NEMO. The authors define a new metric for cost calculation in the process. Both the newly developed metric and the analytical model are likely to be useful to network engineers in estimating the resource requirement at the key entities while designing such a network. The article titled “A Highly Flexible LDPC Decoder using Hierarchical Quasi-Cyclic Matrix with Layered Permutation” deals with Low Density Parity Check decoders. The authors, Vikram Arkalgud Chandrasetty and Syed Mahfuzul Aziz propose a novel multi-level structured hierarchical matrix approach for generating codes of different lengths flexibly depending upon the requirement of the application. The manuscript “Analysis of Performance Limitations in Fiber Bragg Grating Based Optical Add-Drop Multiplexer due to Crosstalk” has been contributed by M. Mahiuddin and M. S. Islam. The paper proposes a new method of handling crosstalk with a fiber Bragg grating based optical add drop multiplexer (OADM). The authors show with an analytical model that different parameters improve using their proposed OADM. The paper “High Performance Hierarchical Torus Network Under Adverse Traffic Patterns” addresses issues related to hierarchical torus network (HTN) under adverse traffic patterns. The authors, M.M. Hafizur Rahman, Yukinori Sato, and Yasushi Inoguchi observe that dynamic communication performance of an HTN under adverse traffic conditions has not yet been addressed. The authors evaluate the performance of HTN for comparison with some other relevant networks. It is interesting to see that HTN outperforms these counterparts in terms of throughput and data transfer under adverse traffic. The manuscript titled “Dynamic Communication Performance Enhancement in Hierarchical Torus Network by Selection Algorithm” has been contributed by M.M. Hafizur Rahman, Yukinori Sato, and Yasushi Inoguchi. The authors introduce three simple adapting routing algorithms for efficient use of physical links and virtual channels in hierarchical torus network. The authors show that their approaches yield better performance for such networks. The final title “An Optimization Technique for Improved VoIP Performance over Wireless LAN” has been contributed by five authors, namely, Tamal Chakraborty, Atri Mukhopadhyay, Suman Bhunia, Iti Saha Misra and Salil K. Sanyal. The authors propose an optimization technique for configuring the parameters of the access points. In addition, they come up with an optimization mechanism in order to tune the threshold of active queue management system appropriately. Put together, the mechanisms improve the VoIP performance significantly under congestion. Finally, the Guest Editors would like to express their sincere gratitude to the 15 reviewers besides the guest editors themselves (Khalid M. Awan, Mukaddim Pathan, Ben Townsend, Morshed Chowdhury, Iftekhar Ahmad, Gour Karmakar, Shivali Goel, Hairulnizam Mahdin, Abdullah A Yusuf, Kashif Sattar, A.K.M. Azad, F. Rahman, Bahman Javadi, Abdelrahman Desoky, Lenin Mehedy) from several countries (Australia, Bangladesh, Japan, Pakistan, UK and USA) who have given immensely to this process. They have responded to the Guest Editors in the shortest possible time and dedicated their valuable time to ensure that the Special Issue contains high-quality papers with significant novelty and contributions

Analisis Sikap Konsumen terhadap Atribut Sabun Mandi Biasa di Kota YOGYAKARTA (Studi pada Merek Lux dan Giv)

The study has as its rationale the fact that there are numerous brands of bath soap in the market. The changes of consumer behavior, which influenced by the economy crisis occurred in Indonesia, has suppressed the producers to readjust their marketing programs. It is crucial for the firms to recognize the consumer attitudes on their products in making their marketing programs. The study was aimed at understanding: (1) the consumer attitudes on the bath soaps' (i.e., Lux and Giv brands) attributes, (2) the influence of the consumer's social environment toward the subjective norm in making the purchasing decision on the Lux and Giv, (3) the differential of consumers attitudes on the Lux and Giv. Interview and questionnaire were used to collect data, by using the semantic differential scale method. Fishbein model and Wilcoxon's signed rank test were applied to test the study's results. Results of the study showed that: (1) there was a positive attitude of consumer on both the Lux and Giv. “Aroma”, whereas “prestige” had the lowest positive score for the Giv; (2) the consumer's social environment influenced the subjective norms of consumer in making the purchasing decision of the Lux and Giv. “Family members” was the dominant variable of both the Lux and Giv; (3) there were the differences in the consumer attitude between the Lux and Giv brands. By the differential test for each attribute, then, it was showed that there were the significant differences in the consumer attitude on the product's attributes, except for the “packaging”. Based on the study results and empirical evidences supported by the statistical testing, it is showed that the two bath soap brands have dominate the consumer's mind. Nevertheless, in making their purchasing decision, the consumers have the difference attitudes in assesing those two brands depends on their desires

Analisa Kelayakan Etanol Kadar Rendah Sebagai Bahan Bakar Pada Kompor Bergravitasi

Low grade alcohol  is energy that can be renewed. when compared to kerosene and LPG, bioethanol stove is non explossive, does not require a large pressure and easy to manufacture. This study to determine the effect of the height and length of  heating coil burner water heating time, preparation time and fuel consumption. The principle of low grade of ethanol stove is used the position of the fuel tank height and speed up the process of  evaporation. Variations used in this study is the length of the heating coil burner that is 55 cm, 75 cm, 95cm, and height is given by 1.5 m, 1.75 m, and 2 m. The results indicate that the use water heating fastest time obtained at 2 m height variation with of 95 cm burner heating coil of 790 seconds. At the time of preparation reduction obtained at the optimal height variation of 1.5 mand lenghth 95 cm of burner heating coils is 328 sekonds. The lowest fuel consumption obtained when using length variation burner heating coil 55 cm and a height of 1.5 m  at 0.132 ml/sec

Analisis Sikap Konsumen terhadap Atribut Sabun Mandi Biasa di Kota Yogyakarta

The study has as its rationale the fact that there are numerous brands of bath soap in the market. The changes of consumer behavior, which influenced by the economy crisis occurred in Indonesia, has suppressed the producers to readjust their marketing programs. It is crucial for the firms to recognize the consumer attitudes on their products in making their marketing programs. The study was aimed at understanding: (1) the consumer attitudes on the bath soaps (i.e., Lux and Giv brands) attributes, (2) the influence of the consumers social environment toward the subjective norm in making the purchasing decision on the Lux and Giv, (3) the differential of consumers attitudes on the Lux and Giv. Interview and questionnaire were used to collect data, by using the semantic differential scale method. Fishbein model and Wilcoxons signed rank test were applied to test the studys results. Results of the study showed that: (1) there was a positive attitude of consumer on both the Lux and Giv. Aroma, whereas prestige had the lowest positive score for the Giv; (2) the consumers social environment influenced the subjective norms of consumer in making the purchasing decision of the Lux and Giv. Family members was the dominant variable of both the Lux and Giv; (3) there were the differences in the consumer attitude between the Lux and Giv brands. By the differential test for each attribute, then, it was showed that there were the significant differences in the consumer attitude on the products attributes, except for the packaging. Based on the study results and empirical evidences supported by the statistical testing, it is showed that the two bath soap brands have dominate the consumers mind. Nevertheless, in making their purchasing decision, the consumers have the difference attitudes in assesing those two brands depends on their desires. Keywords : consumer behavior, bath soap attribute

Kemampuan Guru Sosiologi dalam Melaksanakan Kompetensi Pedagogik di SMA Muhammadiyah 1 Pontianak

The title of this Tesis is “The Ability Of Sosiology's Teacher In Doing Pedagogic Competence At Sma Muhammadiyah 1 Pontianak”. General problem of this research in is “How is the ability of Sosiologys's Teacher in doing pedagogic competence at SMA Muhammadiyah 1 Pontianak?” The first specific problem of this research is how the ability of sosiology's teacher in developing the curriculumat SMA Muhammadiyah 1 Pontianak is, while the second is how the ability of sosiologys' teacher in designing learnig activities at SMA Muhammadiyah 1 Pontianak is. The objectives of this research are to analyse the ability of Sosiology's teacher in developing curriculum and to analyse the ability of Sosiology's teacher in designing Learning activies at SMA Muhammadiyah 1 Pontianak. The approach that used in this research is qualitative approach with decriptive method. The technic of data collecting chosen are observation, interview, and documentation technic. Data Analyse in this research is presented by qualitative descriptive approach way using two informans that are Th head master and the sosiology's teacher of SMA Muhammadiyah 1 Pontianak. The result of this research show that the ability of sosiology's teacher in term of pedagogic competence is good enough, shown by both indicator that have been analyzed, they are develoving curriculum; syllabus design and learning activities design, and educative learning activities; doing teaching learning process based on learning plan and learning objective

Analisis Keterampilan Bertanya oleh Guru Mata Pelajaran Sosiologi pada Kelas X Mas Khulafaur Rasyidin

The purpose in this research is to analyze the ability of asked by sociology teacher study program of X class Khulafaur Rasyidin Kabupaten Kubu Raya. The method that is used in this research is descriptive qualitative method. The result of this research showed that the ability of asked by sociology teacher of X class Mas Khulafaur Rasyidin Kabupaten Kubu Raya is optimal yet. This case is seen from both aspects the ability of asked, the teacher only fulfill one aspect. The aspect is the ability of basic asked. The ability of basic asked, it seen and got from skill and teacher\u27s ability of basic asked in learning process. Teacher often gives a question and receive student\u27s question well. The ability of the next level asked that the teacher did of sociology study program is not optimal yet. This case can be seen from the teacher of the next level asked, when the teacher given a question to the students in the cognitive level, the teacher is not optimal yet or it is not mastered yet all of them about the setting list of a question from the lowest cognitive level to the complex level

Peranan Orang Tua dan Sekolah dalam Mengantisipasi Anak Putus Sekolah

This research was motivated by the desire of researchers to determine the role of parents and schools in anticipation of school dropouts in MTs Pesantren Al-Khoiriyah Turmeric River District Mempawah Year 2014-2015. Sub problem in this research are as follows: 1) how is the role of parents in anticipation of school children in boarding AL-Khoiriyah Turmeric River District Mempawah Year 2014-2015, 2) how the role of the school in anticipation of school children in boarding AL-Khoiriyah Turmeric River Mempawah Regency Year 2014-2015. The results showed: First, the role of parents and schools in anticipation of school dropouts in MTs Pesantren Al-Khoiriyah Turmeric River Mempawah Regency Year 2014-2015 ie, caregiving, instill a love between people, justly, pay attention to children's friends, put in a good environment. Second, the role of the school in anticipation of school dropouts in MTs Pesantren Al-Khoiriyah Turmeric River Mempawah Regency Year 2014-2015 is the school created a situation which could pose school students to remain at home in learning, making clear regulations, making the classroom a comfortable , good work between teachers and schools, the implementation of the BK good, good relationships between the school and parents

Mining question-answer pairs from web forum: a survey of challenges and resolutions

Internet forums, which are also known as discussion boards, are popular web applications. Members of the board discuss issues and share ideas to form a community within the board, and as a result generate huge amount of content on different topics on daily basis. Interest in information extraction and knowledge discovery from such sources has been on the increase in the research community. A number of factors are limiting the potentiality of mining knowledge from forums. Lexical chasm or lexical gap that renders some Natural Language Processing techniques (NLP) less effective, Informal tone that creates noisy data, drifting of discussion topic that prevents focused mining and asynchronous issue that makes it difficult to establish post-reply relationship are some of the problems that need to be addressed. This survey introduces these challenges within the framework of question answering. The survey provides description of the problems; cites and explores useful publications to the reader for further examination; provides an overview of resolution strategies and findings relevant to the challenges