Improving Revegetation of Degraded Dryland Using Zeolitic Tuff and Saltbush Species

Drought is considered one of the major problems that renders the success of rehabilitation activities in arid and semi rangeland. Promoting survival and growth, using zeolitic tuff added to planting holes is suggested as possible solution. An experiment was conducted using a factorial design. Two shrub species (Atriplex halimus L., Atriplex nummularia Lindl.) were transplanted into holes prepared with three levels of tuff treatments (mulching, mixing and control) under rainfed condition. The result showed no significant effect of tuff on seedling survival percentage, when mixing tuff with plantation soil or adding tuff as mulch. Also, the two species showed similar survival percentages over two measured dates. However, mixing tuff with soil during hole preparation significantly enhanced seedling heights. The Australian Atriplex (Atriplex nummularia) species significantly grew higher than the Mediterranean Atriplex halimus. Also, results revealed insignificant effect of tuff treatments (mixing, mulch and control) on recorded species richness. But, the Australian Atriplex species significantly harbors more diverse species than the local Atriplex. The study concluded using zeolitic tuff had the potential to enhance seedling growth, thus improving the success of rangeland rehabilitation in dry areas

Air Pollution Modelling to Predict Maximum Ground Level Concentration for Dust from a Palm Oil Mill Stack

The study is to model emission from a stack to estimate ground level concentration from a palm oil mill. The case study is a mill located in Kuala Langat, Selangor. Emission source is from boilers stacks. The exercise determines the estimate the ground level concentrations for dust to the surrounding areas through the utilization of modelling software. The surround area is relatively flat, an industrial area surrounded by factories and with palm oil plantations in the outskirts. The model utilized in the study was to gauge the worst-case scenario. Ambient air concentrations were garnered calculate the increase to localized conditions.Keywords: emission, modelling, palm oil mill, particulate, POM

Detection of rotavirus infection in children with gastroenteritis attending three selected hospitals in Kano metropolis, Nigeria

The study aimed at detecting the incidence of rotavirus infection among children with gastroenteritis in Kano Metropolis. It was a descriptive cross-sectional study and a total of 200 stool samples were randomly collected and assayed for the presence of rotavirus antigens using Enzyme Linked Immunosorbent Assay and confirmed using Real Time Polymerase Chain Reaction. The study revealed that 21/200 (10.5%) stool samples were positive for rotavirus antigen and more males 13/21(6.5%) were positive than females 8/21 (4%) (p>0.05). The highest and lowest incidence rates in rotavirus infection of 42.8% (9/21) and 4.8% (1/21) were found among children aged 7–12 month and 31–36; 43–48 month (p>0.05) respectively. Most of the positive samples (95%) were from those who presented with diarrhea, vomiting and fever (p<0.05). The study further revealed that 20/21(95%) of the positive children were from married couples and the incidence rate was found to be independent of the educational level of the parent (p>0.05). Among the risk factors considered, source of drinking water (tap water) and playing with toys appeared to be the most predisposing factors as 16/21 (76%) and 19/21 (90.5%) of the children were found to be infected (p>0.05). Finally, the lowest rate of rotavirus infections was found in only 1/21 (0.5%) among the exclusively breastfed children compared to 14/21 (7%) of those on mixed feeding (p>0.05). The study recommends detection of rotavirus infection to be part of routine laboratory tests in our hospitals and advocates the concept of exclusive breastfeeding to curtail rate of infection among infants.Keywords: Rotavirus, Incidence rate, Risk factors, Children, Hospitals, Kano State

Nd:YAG laser welding of stainless steel 304 for photonics device packaging

Although pulsed Nd:YAG laser welding has been widely used in microelectronics and photonics packaging industry, a full understanding of various phenomena involved is still a matter of trials and speculations. In this research, an ultra compact pulsed Nd:YAG laser with wavelength of 1.064 µm has been used to produce a spot weld on stainless steel 304. The principal objective of this research is to examine the effects of laser welding parameters such as laser beam peak powers, pulse durations, incident angles, focus point positions and number of shots on the weld dimensions: penetration depth and bead width. The ratio of the penetration depth to the bead width is considered as one of the most critical parameters to determine the weld quality. It is found that the penetration depth and bead width increase when the laser beam peak power, pulse duration and number of shot increase. In contrast, the penetration depth decreases when the laser beam defocus position and incident angle increase. This is due to the reduction of the laser beam intensity causing by the widening of the laser spot size. These experimental results provide a reference on an optimal laser welding operations for a reliable photonics device packaging. The results obtained shows that stainless steel 304 is suitable to be used as a base material for photonics device packaging employing Nd:YAG laser welding technique

Sistem Informasi Manajemen Untuk Pengelolaan Kafe

Kafe Green Black merupakan salah satu kafe yang bertempat di jalan Kol HR Hardianto Banaran Sekaran Gunung Pati, dimana selalu berusaha mengedepankan dalam peningkatan pelayanan terhadap pelanggan. Proses transaksi yang masih manual dirasakan kurang efektif dan efisien. Sehingga perlu disediakan sistem informasi dimana pegawai dapat langsung merekap transaksi baik penjualan ataupun pembelian secara cepat. Dari rekap data transaksi tersebut Pimpinan dapat secara langsung mengetahui laporan laporan yang digunakan sebagai bahan pertimbangan bulan selanjutnya dalam menentukan strategi penjualan dan penggajian pegawai. Dalam sistem ini juga dibuat fasilitas yang terkait dengan proses absensi karyawan dan aplikasi akuntansi terutama terkait dengan buku besar dan laporan laba/rugi. Aplikasi sistem informasi manajemen untuk pengelolaan kafe dibangun menggunakan bahasa pemrograman Borland Delphi 7.0 dan basis data MySQL. Dengan adanya aplikasi sistem informasi ini diharapkan kegiatan transaksi yang terjadi menjadi lebih praktis, proses rekap transaksi jadi lebih mudah, dan laporan keuangan ataupun laporan pembelian barang secara bulanan ataupun sewaktu waktu dapat diketahui lebih cepat

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