Grid-scale Fluctuations and Forecast Error in Wind Power

The fluctuations in wind power entering an electrical grid (Irish grid) were analyzed and found to exhibit correlated fluctuations with a self-similar structure, a signature of large-scale correlations in atmospheric turbulence. The statistical structure of temporal correlations for fluctuations in generated and forecast time series was used to quantify two types of forecast error: a timescale error ($e_{\tau}$) that quantifies the deviations between the high frequency components of the forecast and the generated time series, and a scaling error ($e_{\zeta}$) that quantifies the degree to which the models fail to predict temporal correlations in the fluctuations of the generated power. With no $a$ $priori$ knowledge of the forecast models, we suggest a simple memory kernel that reduces both the timescale error ($e_{\tau}$) and the scaling error ($e_{\zeta}$)

IS discipline in the IT services land : an exploratory study of IS in India

Information Systems (IS) research is characterized by plurality of methodologies, perspectives and contexts giving rise to various communities within the discipline. Studies of IS communities in North America, Europe and Asia-Pacific highlight the cognitive diversity, institutional distribution and research themes based on geography. While regional variations have been acknowledged, the debate on the identity and status of IS is on-going. In this paper we conduct an exploratory study of the IS research paradigm in India and contribute to IS discipline studies by bringing in the India perspective. We analyse the &lsquo;cognitive&rsquo; and &lsquo;behavioural&rsquo; legitimacy of IS discipline in India based on interviews conducted with Indian business school professors from IS and non-IS disciplines. The focus of the study is to understand the current state of IS research community in India. We find a need to establish a &lsquo;collective identity&rsquo; of IS research in India, which will benefit both the Indian and larger IS community to work on unique research possibilities presented by the socioeconomic context of India.<br /

Design of Progressively Folding Thin-Walled Tubular Components Using Compliant Mechanism Synthesis

This work introduces a design method for the progressive collapse of thin-walled tubular components under axial and oblique impacts. The proposed design method follows the principles of topometry optimization for compliant mechanism design in which the output port location and direction determine the folding (collapse) mode. In this work, the output ports are located near the impact end with a direction that is perpendicular to the component's longitudinal axis. The topometry optimization is achieved with the use of hybrid cellular automata for thin-wall structures. The result is a complex enforced buckle zone design that acts as a triggering mechanism to (a) initiate a specific collapse mode from the impact end, (b) stabilize the collapse process, and (c) reduce the peak force. The enforced buckle zone in the end portion of the tube also helps to avoid or delay the onset of global bending during an oblique impact with load angles higher than a critical value, which otherwise adversely affects the structure's capacity for load-carrying and energy absorption. The proposed design method has the potential to dramatically improve thin-walled component crashworthiness

Pemetaan Total Suspended Solid (Tss) Menggunakan Citra Satelit Multi Temporal Di Danau Rawa Pening Provinsi Jawa Tengah

Rawa Pening is a natural lake located in Central Java that vital existence. Quality and quantity of water are mayor concern. One of water quality parameter is Total Suspended Solid (TSS). TSS are solid materials, including organic and anorganic, that are suspended in the water. High concentration of TSS can reduce the penetration of sunlight into water bodies, increase water turbidity, and can settle at any time, causing silting.Distribution of TSS cab be identified using satellite remote sensing imagery. Metode used is development of modelling algorithms using regression equation of the relationship between the insitu value and reflectance of Landsat-7 ETM+ image at 2013. This research aims to determine the suitable empirical algorithm to estimate the concentration of TSS and mapping the distribution of TSS in Rawa Pening at 2002, 2007, and 2013.The research result shows that ratio between blue band and green band of Landsat-7 ETM+ using logarithmic regression are the most suitable algorithm for estimating TSS concentration in Rawa Pening. The equation are TSS=368,7ln(x)+31,52. Water Quality in Rawa Pening has decrease at 2007 compared to 2002, and increase at 2013

VALIDATED STABILITY-INDICATING RP-HPLC ASSAY METHOD FOR AZATHIOPRINE IN PHARMACEUTICAL DOSAGE FORM ACCORDING TO ICH GUIDELINES

Objective: A simple, sensitive, precise and accurate stability-indicating HPLC method has been developed and validated for determination of Azathioprine in bulk drug and in pharmaceutical dosage form in the presence of degradation products. Methods: An isocratic, reversed phase HPLC method was developed to separate the drug from the degradation products, using a Hypersil C8, 150 X 4.6 mm, 5µ, Thermostat column compartment connected with Waters (alliance) Empower software. Mobile phase consists mixture of Potassium dihydrogen phosphate(A) and Acetonitrile(B) in the ratio (pH 6.50±0.1, ratio 60:40 v/v) at a flow rate of 1.0 mL /min. The linear regression analysis data for the calibration curve showed a good linear relationship with regression coefficient 1. The detection was carried out at a wavelength of 254 nm. Results: The linearity of the method were excellent over the range 2.5-15 μg/ml, the linear regression equation was Y=76621×+12515. The Azathioprine was subjected to stress conditions of hydrolysis (acid, base), photolysis and thermal degradation. Degradation was observed for Azathioprine in acid, base, heat and UV. The degradation products were well resolved from the main peak. The percentage recovery of Azathioprine was from (98.0 to 102.0 %.) in the pharmaceutical dosage form. Conclusion: The results demonstrated that the method would have a great value when applied in quality control and stability studies. The developed method was validated with respect to linearity, accuracy (recovery), precision, system suitability, specificity and robustness. The forced degradation studies prove the stability indicating power of the method

Aplikasi Terrestrial Laser Scanner Untuk Pemodelan Tampak Muka Bangunan (Studi Kasus: Gedung PT. Almega Geosystems, Kelapa Gading-Jakarta)

Perkembangan dunia survei dan pemetaan sangatlah pesat. Di era sekarang ini, pemanfaatan teknologi Terrestrial Laser Scanner dapat memberikan solusi untuk pendokumentasian suatu bangunan maupun pengukuran topografi. Teknologi ini dinilai sangat efisien jika dibandingkan dengan teknologi pengukuran lainnya. Hasil pengukuran Terrestrial Laser Scanner berupa point clouds yang mempunyai koordinat 3 dimensi. Dalam tugas akhir ini, metode pengukuran Terrestrial Laser Scanner digunakan untuk pemodelan tampak muka bangunan gedung PT. Almega Geosystems, Kelapa Gading-Jakarta. Proses akuisisi data di lapangan dan pengolahan data menggunakan software Cyclone V.7.4 (compatible with Leica Scan Station 2). Hasil akhir dalam penelitian ini adalah model tampak muka bangunan gedung PT. Almega Geosystems, Kelapa Gading-Jakarta. Pengujian hasil pengolahan model dilakukan dengan dua pengujian, yaitu perbandingan jarak antar sisi gedung hasil pengukuran Electronic Total Station dan laser disto meter. Nilai rata-rata kesalahan dari perbandingan jarak antar sisi mengunakan Electronic Total Station sebesar 0.00527 meter dan nilai rata-rata kesalahan dari perbandingan jarak antar sisi dengan laser disto meter sebesar 0.00708 meter

Analisis Zonasi Daerah Rentan Banjir Dengan Pemanfaatan Sistem Informasi Geografis (Studi Kasus : Kota Kendal Dan Sekitarnya)

Kota Kendal merupakan daerah dataran rendah yang berada di pesisir pantai utara Laut Jawa yang sering dilanda bencana banjir, tidak terkecuali daerah-daerah di sekitar Kota Kendal. Seiring dengan terus bertambahnya jumlah penduduk di Kota Kendal dan sekitarnya akan memberikan dampak terhadapan pembangunan pemukiman yang baru yang akan mempersempit ruang resapan air. Disamping Kota Kendal dan sekitarnya yang memiliki drainase yang buruk dan banyaknya sungai yang sering meluap ketika hujan turun akan menimbulkan terjadinya banjir. Pemanfaatan Sistem Informasi Geografis (SIG) sangatlah penting, dimana kurangnya aplikasi SIG yang bisa menjelaskan, mempresentasikan objek daerah rentan banjir dari dunia nyata yang digunakan di dalam bentuk digital. Dalam penelitian ini, parameter yang digunakan adalah data kemiringan lereng, jenis tanah, jaringan drainase, curah hujan, dan penggunaan lahan tahun 2008 yang diperoleh dalam bentuk peta digital. Peta digital akan diolah dengan menggunakan software ArcGIS 9.3. Setiap data parameter akan diskoring dengan pemberian harkat dan bobot sesuai pengklasifikasiannya masing-masing yang kemudian dilakukan overlay intersect. Pada tahap akhir dilakukan validasi yang bermanfaat untuk menguji kebenaran kerentanan banjir di lapangan. Hasil akhir dari penelitian ini adalah Peta Kerentanan Banjir Kota Kendal dan Sekitarnya

Efektivitas Penentuan Garis Pantai Menggunakan Citra Resolusi Tinggi Dan Resolusi Menengah (Studi Kasus : Kabupaten Pacitan)

Coastline is an imaginer line where the sea water and the land meet. Country's coastline now is not a problem that could be ignored. Nowdays, remote sensing technology have been developing and got many benefits. One of them is determine the coastline. Remote sensing could be used quickly and easily to reach areas that not be able to be reached by terestris measure. In this research, coastline is determined by the Landsat imagery and UAV then compare both effectivity from horizontal accuracy of scale presenment on map.Coastline determining with UAV uses Agisoft PhotoScan Sofware to get the orthophoto. Whereas, coastline determining with Landsat imagery use the BILKO formula to show the difference of the land and the sea. The coastline determining using these datas is done by digitizating the boundary between the land and the sea while during the recorder and photography of the data. The result is temporary coastline.The goal of this research is showing the steps to determine the coastline by using UAV with Agisoft PhotoScan to get orthophoto and using Landsat imagery with BILKO formula. After it, this researh do the accuracy test based on PERKA BIG No 15 Tahun 2014 and it generate the horizontal accuracy 0.032 meters with first class map scale 1:1,000 for UAV and horizontal accuracy 9.300 meters with first class map scale 1:50,000 for Landsat imagery presentment on the map