Perangkat Lunak Segmentasi Citra dengan Metode Watershed

Metode watershed merupakan salah satu metode dalam segmentasi citra yang membagi citra menjadi region yang berbeda dengan menggambarkan citra sebagai relief topografi. Metode watershed menghasilkan terlalu banyak region yang menyebabkan bagian penting objek terpisah atau disebut oversegmentasi, sehingga perlu dilakukan pengembangan metode. Cara mengurangi oversegmentasi pada metode watershed dapat meliputi watershed dengan memanfaatkan perbedaan gradien untuk menentukan arah dari kemiringan topografi, penambahan marker yang dapat digunakan untuk mensegmentasi sebagian objek yang dipilih, serta dengan menggunakan multiresolusi yang mengurangi oversegmentasi dengan skala ruang. Tujuan dari penelitian ini adalah mengembangkan perangkat lunak yang mampu melakukan proses segmentasi citra dengan menggunakan metode watershed beserta perbedaannya dengan watershed morfologi, marker watershed, dan multiresolusi watershed. Hasil dari perangkat lunak adalah tampilan segmen dari citra awal dan waktu yang dibutuhkan untuk mendapatkan hasil segmen

A novel scheme for control by active and reactive power utilized in gearless variable speed wind turbine system with PMSG connected to the grid

Introduction. As a result of increasing fossil fuel price and state-of-the-art technology, more and more residential and commercial consumers of electricity have been installing wind turbines. The motivation being to cut energy bills and carbon dioxide emissions. Purpose. The main goal of this work is developing a control scheme for a variable speed wind turbine generator in order to produce utmost power from varying wind types, and variable wind speed. Novelty. This research paper presents an IGBT power converter control scheme for active power in relation to wind speed and reactive power by adjusting Q-reference (Qref) value in a gearless variable speed wind turbine with permanent magnet synchronous generator. Methods. An effective modelling and control of the wind turbine with the suggested power converter is executed by utilizing MATLAB/Simulink software. The control scheme consists of both the wind turbine control and the power converter control. Simulation results are utilized in the analysis and deliberation of the ability of the control scheme, which reveals that the wind turbine generator has the capability to actively sustain an electric power grid network, owing to its ability to independently control active and reactive power according to applied reference values at variable wind speed. Practical value. This research can be utilized for assessing the control methodology, the dynamic capabilities and influence of a gearless variable-speed wind energy conversion system on electric power grids. A case study has been presented with a (3×10 MW = 30 MW) wind farm scheme.Вступ. Внаслідок зростання цін на викопне паливо та використання найсучасніших технологій, дедалі більше побутових та комерційних споживачів електроенергії встановлюють вітряні турбіни. Мотивація полягає в тому, щоб скоротити рахунки за електроенергію та викиди вуглекислого газу. Мета. Основною метою цієї роботи є розробка схеми управління вітряним генератором зі змінною швидкістю для отримання максимальної потужності від різних типів вітру та змінної швидкості вітру. Новизна. У даній дослідницькій роботі представлена схема управління силовим IGBT перетворювачем для активної потужності в залежності від швидкості вітру та реактивної потужності шляхом регулювання значенняQ-еталона (Qref) у безредукторній вітровій турбіні з регульованою швидкістю та синхронним генератором із постійними магнітами. Методи. Ефективне моделювання та керування вітровою турбіною з запропонованим перетворювачем потужності здійснюється з використанням програмного забезпечення MATLAB/Simulink. Схема управління складається з управління вітряною турбіною і з управління силовим перетворювачем. Результати моделювання використовуються для аналізу та обговорення можливостей схеми управління, що показує, що генератор вітрової турбіни здатний активно підтримувати електроенергетичну мережу завдяки своїй здатності незалежно контролювати активну та реактивну потужність відповідно до застосовуваних еталонних значень при змінній швидкості вітру. Практична цінність. Це дослідження може бути використане для оцінки методології управління, динамічних можливостей та впливу безредукторної системи перетворення енергії вітру зі змінною швидкістю на електричні мережі. Наведено тематичне дослідження зі схемою вітряної електростанції (3×10 МВт = 30 МВт)

Pengembangan Website untuk Bali Perabot

Bali Perabot is a trading business that sells various types of furniture, ranging from spring beds, cabinets, and other furniture types. Bali Perabot owner still wants to expand his business. In order to expand the area of marketing, this business has to open branches up to three branches. It surely requires a huge cost and difficult management. The complexity of the business process management is compounded when the store has to serve a lot of customers who do not do transactions, but just merely inquired information about the product that is being sold, especially if it adjacents to several festivals. Based on these problems, Bali Perabot requires a more effective solution in order to expand the marketing scope without having to open many branches and to serve a better information for customers. The solution obtained was to develop a marketing website based on the needs of Bali Perabot owner by using Joomla CMS and is equipped with additional extensions, named VirtueMart 3.0.6.2 and SJ Filter for VirtueMart - Joomla! Module. The developed website has eventually provided convenience to customers who want to search a furniture based on product category, price, and several important specifications needed to determine a product selection

Multicomponent reaction-derived covalent inhibitor space

The area of covalent inhibitors is gaining momentum due to recently introduced clinical drugs, but libraries of these compounds are scarce. Multicomponent reaction (MCR) chemistry is well known for its easy access to a very large and diverse chemical space. Here, we show that MCRs are highly suitable to generate libraries of electrophiles based on different scaffolds and three-dimensional shapes and highly compatible with multiple functional groups. According to the building block principle of MCR, acrylamide, acrylic acid ester, sulfurylfluoride, chloroacetic acid amide, nitrile, and alpha,beta-unsaturated sulfonamide warheads can be easily incorporated into many different scaffolds. We show examples of each electrophile on 10 different scaffolds on a preparative scale as well as in a high-throughput synthesis mode on a nanoscale to produce libraries of potential covalent binders in a resource-and time-saving manner. Our operational procedure is simple, mild, and step economical to facilitate future covalent library synthesis

Pengukuran Resistivitas Bahan Organik Superkonduktor β'-(BEDT-TTF)2ICl2 Dengan Metode Four Point Probe

Telah dilakukan pembuatan kristal β'-(BEDT-TTF)2ICl2 dengan proses elektro sintesis kimia selama 8 hari. Proses elektrolisis ini dilakukan di dalam incubator dengan arus 1.5 μA. Kristal yang dihasilkan berwarana hitam memanjang . Kristal ini bersifat bahan organik metal dimana BEDT-TTF sebagai kation dan ICl2 sebagai anion. Selanjutnya kristal ini dilakukan pengukuran resistivitas dengan menggunakan metode four point probe. Metode ini menggunakan kawat emas (Au) sebagai probe, dua probe sebagai sumber arus dan 2 probe lainya sebagai pengukur beda potensial. Hasil karakterisasi menunjukan penambahan resistivitas sesuai dengan penurunan temperatur. Hal ini dikibatkan pengaruh dari β', sehingga kristal ini memiliki bentuk satu dimensi. Oleh sebab itu kristal β'-(BEDT-TTF)2ICl2 ini bersifat antiferromagnetik insulator (Mott Insulator)

PENGARUH KOMPENSASI DAN KETERLIBATAN KERJA TERHADAP KINERJA KARYAWAN

Abstract: Purpose of this research is to examine the effect of compensation and job involvement on the employee performance in the building management shopping center in Malang. The sample in this study amounted to 95 employees from 95 employees population. This study is empirical study, that using Total Sampling technique in data collection and using multiple linear regression analysis. Primary data obtained by using questionnaire. The results of this study indicate that the majority of employees have been satisfied with compensation and job involvement, and the majority of employees have good performanceKeywords: Compensation, Job Involvement, Job Performance  Abstrak: Penelitian ini bertujuan untuk menguji pengaruh kompensasi dan keterlibatan kerja terhadap kinerja karyawan bagian building management sebuah pusat perbelanjaan di Kota Malang. Sampel pada penelitian ini berjumlah 95 karyawan dari populasi 95 karyawan. Penelitian ini merupakan studi empiris yang menggunakan teknik Total  Sampling dalam pengumpulan data dan menggunakan analisis regresi linier berganda.Data yang digunakan adalah data primer yang diperoleh dengan menggunakan kuesioner.Hasil penelitian ini menunjukkan bahwa mayoritas karyawan telah puas dengan kompensasi dan keterlibatan kerja dan mayoritas karyawan memiliki kinerja yang baik. Kata kunci: Kompensasi, Keterlibatan Kerja, Kinerja Karyawa

Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java

Granitoid outcrop has been observed in Montongan, Tulakan Subdistrict, Pacitan District, East Java. Geochemically, granitoid shows peralluminous S-type granitoid which consists of comparable plagioclase and potassium feldspar leading to adamelite and granodiorite variety with andalusite, fine size corundum and cordierite inside. These modal minerals are consistent with its bulk chemical analysis result that shows alumina rich rock. Highly weathered spotted pinkish soil with remaining quartz gravels characterizes its surface. Lateritic pink soil up to more than 25 meters thick covers the granitoid body and this feature is indicative to locate its surface distribution, while its subsurface distribution is remain uncertain. The research aimed to identify granitoid subsurface distribution. To identify the subsurface body, gravity and seismic tomography models were used. According gravity model, the pluton body is 5 km wide which is rootless downward and seems extends eastward. Meanwhile, the north-south seismic tomographic model across Pacitan Region indicates dense solid body override the recent Java subduction zone. The body is assumed to have correlation with surface granitic rock. It supports an idea that there is a micro continent trapped beneath Southern Mountain of East Java

IMECE2003-41450 SIMULATION AND DESIGN AN E. COLI-BASED ROTARY MICROPUMP FOR USE IN MICROFLUIDIC SYSTEMS: INTEGRATION OF MICRO-NANO-BIO

ABSTRACT This paper presents the results of the computational fluid dynamic (CFD) modeling of viscous fluid flow in a novel cell motor actuated micropump. A cell motor is a bacterial flagellar cell tethered to a surface by a single flagellum, this flagellum acts as a pivot around which the cell body rotates. As a test case for investigation, the micropump consisted of two Escherichia coli cell motors tethered to the bottom of a microchannel with fixed dimensions. The CFD modeling of the micropump was performed using CFD-ACE + simulation software (CFD Research Corporation). The biological cell motor was modeled as an ellipse with constant rotational speed of 10 Hz clockwise. The results of this model demonstrated the effect of the biological cell motor placement within the microchannel, as well as the rotational phase between the two biological cell motors, on the volumetric flowrate. Pumping action was observed as the cell motor location was moved adjacent to the sidewall of the microchannel. The rates of fluid pumping were of the order of 11 pL/hr when the cell motors were rotating in phase and their placement was close to the sidewall of the microchannel. NOMENCLATURE Biological cell motor, computational fluid dynamics, E. coli, finite-volume, microchannel, microfluidic, micropump