Improving the network transmission cost of differentiated web services

This paper investigates into the transmission cost of web services related messages which is affected by network latency. Web services enable seamless interaction and integration of e-business applications. Web services contain a collection of operations so as to interact with outside world over the Internet through XML messaging. Though XML effectively describe message related information and is fairly human readable, it badly affects the performance of Web services in terms of transmission cost, processing cost, and so on. This paper aims to minimize network latency of message communication of Web services by employing pre-emptive resume scheduling. Fundamental principle of this approach is the provision of preferential treatment to some messages as compared to others. This approach assigns different priorities to distinct classes of messages given the fact that some messages may tolerate longer delays than others. For instance, shorter messages may be given higher priority than longer messages, or the Web service provider may give higher priority to the messages of paying subscribers

Stack-run adaptive wavelet image compression

We report on the development of an adaptive wavelet image coder based on stack-run representation of the quantized coefficients. The coder works by selecting an optimal wavelet packet basis for the given image and encoding the quantization indices for significant coefficients and zero runs between coefficients using a 4-ary arithmetic coder. Due to the fact that our coder exploits the redundancies present within individual subbands, its addressing complexity is much lower than that of the wavelet zerotree coding algorithms. Experimental results show coding gains of up to 1:4dB over the benchmark wavelet coding algorithm

The Induction and Evaluation of Productive Semidwarf Mutants of Basmati-370

Dry, uniform seeds of Basmati 370 with about 14% moisture content were exposed to 0, 15,20 and 25kR doses of gamma rays (60Co source). Twenty one semi-dwarf mutants were selected from 36,000 M2 plants originating from about 12,000 Ml plants. The breeding behaviour of these mutants was studied in M3 and consequently 6 mutants were selected. The comparative yield test of mutants with mother cultivar Basmati-370, established the high yield potential and semi-dwarf plant posture of mutant strains. The other plant attributes as well as physico-chemical traits of the mutants and parent cultivar are also presented

Demonstration of Optical Nonlinearity in InGaAsP/InP Passive Waveguides

We report on the study of the third-order nonlinear optical interactions in In$_{x}$Ga$_{1-x}$As$_{y}$P$_{1-y}$/InP strip-loaded waveguides. The material composition and waveguide structures were optimized for enhanced nonlinear optical interactions. We performed self-phase modulation, four-wave mixing and nonlinear absorption measurements at the pump wavelength 1568 nm in our waveguides. The nonlinear phase shift of up to $2.5\pi$ has been observed in self-phase modulation experiments. The measured value of the two-photon absorption coefficient $\alpha_2$ was 15 cm/GW. The four-wave mixing conversion range, representing the wavelength difference between maximally separated signal and idler spectral components, was observed to be 45 nm. Our results indicate that InGaAsP has a high potential as a material platform for nonlinear photonic devices, provided that the operation wavelength range outside the two-photon absorption window is selected

ANALISIS KINERJA PERSONEL FLIGHT OPERATIONS OFFICER (FOO) PT. GAPURA ANGKASA TERHADAP KESELAMATAN PENERBANGAN DI BANDAR UDARA INTERNASIONAL YOGYA KARTA

Keselamatan penerbangan merupakan  suatu  hal  yang  sangat  penting dalam sebuah penerbangan, ataubisa dikatakan bahwa keselamatan penerbangan adalah kondisi  suatu  penerbangan yang berjalan dengan lancar dan aman dari stasiun keberangkatan hingga tiba di stasiun tujuan. Termasuk personel Flight Operations Officer yang dalam hal ini harus memperhatikan aspek keselamatan dan keamanan dalam suatu penerbangan, sehingga personel FOO dituntut untuk memiliki ketelitian dan kedisiplinan  dalam  melakukan  tugas  dan  tanggung jawabnya agar suatupenerbangan dapat berjalan dengan selamat dan aman. Metode penelitian kualitatif digunakan dalam penelitian ini. Wawancara dan observasi partisipan digunakan sebagai data primer, dan data yang didapat dari kantor operations PT Gapura Angkasa Yogyakarta beserta dokumentasi digunakan sebagai data sekunder dalam penelitian ini, selain itu informasi dari publikasi ilmiah, artikel atau penelitian terdahulu yang berkaitan dengan penelitian yang dilakukan oleh peneliti digunakan sebagai data sekunder dalam penelitian ini. Teknik analisis data dalam penelitian ini menggunakan reduksi data, penyajian data dan penarikan kesimpulan. Berdasarkan data yang didapat dari penelitian ini yang berjudul Kinerja personel Flight Operations Officer (FOO) terhadap keselamatan penerbangan di Bandar Udara Internasional Yogyakarta bahwasannya personel FOO di lapangan sudah melakukan pekerjaanya dengan baik dalam memberikan pelayanankepada suatu penerbangan yang  ditanganinya, baik berupa pemberian informasi  data flight plan,  information weather,  notam-notam  dan  briefing  sudah  dilakukan dengan  baik  ,  namun juga  dalam  penelitian  ini  ditemukan  adanya  beberapa kendala  yang  personel  temui  di  lapangan  yaitu  keterbatasan  SDM  dan juga keterbatasan  sarana  dan pra-sarana  lainnya,  seperti  Jaringan  internet,  supplai kertas, tinta, printer dan komputer yang kerap menjadi hambatan bagi personel FOO yang akan bekerja di lapangan

The roman conquered by delay: reducing the number of preemptions using sleep states

Sleep-states are emerging as a first-class design choice in energy minimization. A side effect of this is that the release behavior of the system is affected and subsequently the preemption relations between tasks. In a first step we have investigated how the behavior in terms of number of preemptions of tasks in the system is changed at runtime, using an existing procrastination approach, which utilizes sleepstates for energy savings purposes. Our solution resulted in substantial savings of preemptions and we expect from even higher yields for alternative energy saving algorithms. This work is intended to form the base of future research, which aims to bound the number of preemptions at analysis time and subsequently how this may be employed in the analysis to reduced the amount of system utilization, which is reserved to account for the preemption delay

Evaluation of social personalized adaptive E-Learning environments : end-user point of view

The use of adaptations, along with the social affordances of collaboration and networking, carries a great potential for improving e-learning experiences. However, the review of the previous work indicates current e-learning systems have only marginally explored the integration of social features and adaptation techniques. The overall aim of this research, therefore, is to address this gap by evaluating a system developed to foster social personalized adaptive e-learning experiences. We have developed our first prototype system, Topolor, based on the concepts of Adaptive Educational Hypermedia and Social E-Learning. We have also conducted an experimental case study for the evaluation of the prototype system from different perspectives. The results show a considerably high satisfaction of the end users. This paper reports the evaluation results from end user point of view, and generalizes our method to a component-based evaluation framework