9 research outputs found
PRIMAL PROGRAM LINEAR MENGGUNAKAN ALGORITMA INTERIOR POINT DAN METODE SIMPLEX
Get PDFABSTRACTPrimal linear programing in of section by operation reseach, “The obyective of Interior Point algoritm and Simplex Methods to make Solution in primal linear programing", simplex method could be formulated to be interior point algoritm linear programing with MatLab basic program to get optimal solution of linear programing obyektif function. Analysis of interior point algoritm by Narendra Karmarkar (1984) from AT. ET. Bell are used interior point choice in feasible region, alpha criteria and primal-dual of linear programing. This study interior point algoritm in primal linear programing solution also makes to simplex method by George Dantzig (1947) solution in linear programing. Interior point algoritm in primal linear programing solution the fastest five hundred of Simplex method, this news the best of The New York Times1.Keywords : Interior Point, Alpha Criteria, Simplex , Primal linear programing
Mudah dan cepat menguasai program web
No full textsebuah tuntutan terhadap penguasaan dal pembuatan situs web. buku ini membahas pemrograman web secara praktis mulai dari dasar.v, 205 hlm.: ilus; 21 cm
Liquid-phase Hydrogenation of Furfuryl Alcohol to Tetrahydrofurfuryl Alcohol under Mild Conditions
No full text現今能源與環境議題日益漸增，在許多場合都被頻繁討論，人類毫無節制地使用石化燃料，不僅影響環境生態，更是漸漸將現代社會推向危險邊緣。而由纖維素轉換得到的生質能被科學家宣稱是解決這個問題的良藥，可作為未來替代石化燃料的綠色能源。 我們需要發展更進一步的程序得到木質纖維素的衍生物，氫化反應就是其中之一。經由糠醇 (furfuryl alcohol ,FFA)進行氫化反應可以得到的四氫糠醇 (Tetrahydrofurfuryl alcohol , THFA)，被認為是農業上的「綠色溶劑」，也是可作為其他有用的化學物質之前驅物。此氫化反應通常要在高壓且100 °C以上的條件下進行，本研究則是利用硼氫化鈉作為氫氣來源，在液相且溫和的條件下 (室溫, 1 atm) 即可反應。我們已也在氣相進行反應，並且將最適條件下的結果與液相比較。銠金屬(rhodium, Rh) 附載於碳材上的商業觸媒可作為氫氣的載體，促進本氫化反應的進行。 在硼氫化鈉作為氫氣來源的系統下，此反應可在2小時內糠醇 (FFA)轉化率達到100%，並四氫糠醇 (THFA)的產率達到79% 。利用氫氣氣體進行氫化反應則可以於50 °C的條件下，在11小時糠醇(FFA)轉化率達到 94%，四氫糠醇 (THFA)的產率則是達到93%。在液相反應的選擇性相對雖然比較差，在常溫下進行反應仍是優勢，另外儀器設置簡易可以降低工業生產的成本，使此程序更具價值。或許可以成為往後進行其他的氫化反應的另一種選擇。Nowadays, energy and environmental issues become more intense and prevalent to be discussed in most occasions. Uncontrolled utility of fossil fuel without any awareness to environmental impacts, certainly endangers our modern civilization. Lignocellulosicderived biomass is claimed by scientists as green-based-energy alternative to replace the fossil fuel soon or later. Further processes need to be performed to make chemicals-derived-lignocellulosic ready to be utilized, and hydrogenation is one of them. Tetrahydrofurfuryl alcohol (THFA) is one of hydrogenation’s products originated from furfuryl alcohol (FFA) which has been regarded as ―green‖ solvent in agriculture sector and precursor for another useful chemicals. Hydrogenation usually is performed under high pressure (above 10 bar) and above 100°C. Author initiated to carry on liquid-phase hydrogenation under open system and 30˚C using NaBH4 as hydrogen-generator. Gasphase hydrogenation had also been performed under certain condition, and its optimum results were used to compare to previous optimum results. Commercial catalyst rhodium embedded on carbon was chosen to carry hydrogenation. System using NaBH4 could achieve 100% conversion of FFA and 79% yield towards THFA at 30˚C for 2 hours reaction. System using H2 gas could convert 94% of FFA and 93% yield towards THFA at 50°C for 11 hours reaction. Despite of selectivity factor, NaBH4 system still achieved high yield, and not forget to mention room temperature reaction, and simple apparatus preparation became value-added. Hydrogenation using NaBH4 could become one option to be considered
INTEROPERABILITAS APLIKASI BERBASIS WEB SERVICE
Get PDFToday, the need to fill information as data is increasing rapidly. At the past, fill many forms in the format of papers. But now, the forms are changing to paperless format. This can be achieve by making an application capable of data input, edit the data, and post the data across all computing/technological platform available these days. The need for this application can communicate with each other. Related to this, there are many things needed, to achieve unlimited data transfer in various applications. One of the most important aspect that can make seamless communication/integration across applications is web service. Keywords: REST API, SOAP, Semanti
RANCANG BANGUN VISUALISASI TOURISM GUIDE PROVINSI DAERAH ISTIMEWA YOGYAKARTA
Get PDFABSTRACT Tourism objects in the Special Region of Yogyakarta are quite interesting to visit. By looking at various kinds of tourist objects, both natural tourism and cultural tourism that can be developed into tourism destinations. The media needs of Yogyakarta tourism promotion still need development. With the internet that facilitates cross-information, it is necessary to build a tourism information system in the Special Region of Yogyakarta in the form of interactive websites, so that the information presented is more interesting. The website that was built covers all tourism objects in Yogyakarta, contains addresses, location images, and a brief description of sound and text. With this website, visitors are expected to be facilitated in finding information and increasing tourist visits to the Special Region of Yogyakarta.Keywords: information, tourism object, internet, website
PROGRESSIVE WEB APPS UNTUK REKAYASA HYBRID APPLICATION BERBASIS TEKNOLOGI MEAN STACK
Get PDFThe main obstacle in making a mobile app is the variety of platforms and operating system versions of mobile devices, as a result the application must be adjusted accordingly. In a long period of time web programming techniques have developed into progressive web apps that can be used for hybrid apps. Hybrid application is an application that can run on many platforms. MEAN Stack technology can be used to produce a good hybrid app. The Ionic framework can be used to implement MEAN Stack technology to produce a hybrid app that is easy and stable. Keywords : Progressive Web Apps, Hybrid Application, MEAN stac
RESEPSI PEMBACA TERHADAP TOKOH RAHWANA DALAM NOVEL DEKONSTRUKSI RAHWANA PUTIH KARYA SRI TEDDY RUSDY DAN IMPLIKASINYA DALAM PENDIDIKAN MULTIKULTURAL
Get PDFThis research aims to find out 1) What are the good and bad qualities, both physical and psychological, of the character Ravana shown by the author in the novel Ravana Putih, 2) How do readers respond to the character Ravana in the novel Ravana Putih, and 3) How do The novel Ravana Putih can have implications for multicultural education, especially as teaching material in schools. The research method uses descriptive qualitative. Data sources were obtained through literature study, listening, notes and interviews. To test validity in this research, a triangulation model was used, which includes data triangulation, theory triangulation and expert triangulation. The results of the research show that it was found that Ravana\u27s good qualities were more dominant than his bad qualities. There are two groups of responses from the reading public to the character Ravana in the novel Ravana Putih, namely agree and disagree. This deconstruction novel can be used as an alternative teaching material in multicultural education in Indonesia to create mutual respect, tolerance and critical thinking among student
Conversion of LDPE Plastic Oil to Gasoline by Supercritical Water Liquefaction
Get PDFLDPE (Low Density Polyethylene) is one of the plastic waste that is often found in the surrounding environment. Based on data from the National Waste Management Information System (SIPSN) in 2022, waste in Indonesia reached 17.834.071 tons/year with 18.5% being plastic waste. Plastic waste management generally uses recycling. However, recycling plastic waste is not efficient enough in tackling plastic waste in Indonesia. Recently, a promising alternative recycling method for the future is pyrolysis, a process to convert plastic into fuel oil. However, the pyrolyzed oil still contains impurities that reduce the quality of the oil. As an effort to improve the quality of pyrolysis oil, the author proposes the addition of zeolite catalyst in the pyrolysis process followed by the Supercritical Water Liquefaction (SWL) method. The zeolite catalyst aids the degradation process thereby accelerating the reaction rate. The SWL method is able to convert plastic waste into low molecular weight chemicals. The results obtained will be analyzed by gas chromatography mass spectroscopy (GC-MS) to determine the length of the carbon chain in the sample. Based on the chromatography data, it is found that the number of peaks and retention times show carbon chains ranging from C8-C12, from these results it can be identified that the sample is included in kerosene or kerosene compounds. After the SWL process, the percentage of kerosene and diesel is reduced to 11% gasoline. So the Supercritical Water Liquefaction process is proven to break down long hydrocarbon chains into lighter ones
