27 research outputs found
Energy Management System for PV-Battery Integrated Module
No full textTransition from fossil fuels to renewable sources is desired by both developed and developing countries due to the environmental concern and rapid technological developments. Governments, consumers, and investors have seen the prospect of Photovoltaic (PV) as a prominent technology to fulfill the electricity demand. For the residential-scale PV system,costs of the PV module(s) and the BoS (Balance-of-System) are usually the issue that discourage the consumers from installing PV system in their households. To tackle this issue, the concept of PV-Battery Integrated Module (PBIM) is developed. The operations of the PBIM are similar with typical operations of PV-battery system, which are controlled by the energy management unit. Energy Management System (EMS) is responsible for ensuring the safety of the electrical components and controlling the system operations to make it efficient. Therefore,implementing the suitable EMS is an integral part of establishing the PBIM system.This research aims to implement a power flow management for the PBIM system to perform two energy management strategies, namely peak shaving and off-grid self-consumption. To achieve that goal, this research focus on selecting the PBIM system architecture, implementing control system and power flow management, and analyzing PBIM system performance on the applications of peak shaving and off-grid self-consumption strategies. Two case studies are introduced in this thesis, namely off-grid PBIM in Cambodia and grid-connected PBIM in the Netherlands.The chosen system architecture for the PBIM is the DC couple architecture. The PBIM system consists of one PV module, one unidirectional boost converter to perform MPPT and curtail operation, one bidirectional buck-boost converter to handle charging and discharging operation, an inverter to connect the PBIM with an AC load, and a battery bank. There are seven modes of operation in the PBIM system, which are utilized to perform peak shaving and off-grid self-consumption strategies.For the off-grid PBIM in Cambodia, a 265Wp module and 8 batteries are used. The PV curtail operation is performed mostly during dry season, due to high irradiance. The LLP during rainy season (4%-7%) is much larger than the LLP during dry season (1%-3%), due to big difference in the irradiance between those two seasons. The total LLP for one year operation is 2.6%.For the grid-connected PBIM in The Netherlands, a 265Wp module and 8 batteries are also used. The peak shaving is performed in this case, hence the battery is being charged during off-peak hours, and the load is supplied by the grid. During peak-hours, the load is supplied by the PV, battery, and the grid. For one PBIM, the system autarky can only a maximum of 16%, hence multiple PBIMs are required to increase the PBIM system autarky for the grid-connected PBIM in the Netherlands.Electrical Engineering | Sustainable Energy Technolog
Cost analysis for heavy equipment in earthfill work – An optimization of heavy equipment fleet (Case study: Jabung ring dike project)
No full textPENGARUH JENIS TANAH TERHADAP TINGKAT KECEPATAN RESAPAN PADA BIOPORI
No full textSalah satu upaya untuk menjaga fungsi dari air tanah agar terjaga adalah dengan membuat titik-titik resapan air agar menjadi tampungan sementara bagi air hujan. Lubang Resapan Biopori adalah salah satu teknologi sederhana yang merupakan solusi praktis dan mudah serta tidak memerlukan biaya yang besar, teknologi ini dipakai untuk mengurangi volume limpasan yang berlebih pada saluran saat terjadi hujan serta untuk membantu dalam peresapan air kedalam tanah. teknologi ini dipakai untuk untuk membantu dalam peresapan air kedalam tanah. Pada lokasi penelitian terdapat 2 jenis tanah yaitu tanah liat berlumpur dan tanah liat berpasir. Dari percobaan tersebut berdasarkan kedalaman pipa resapan yaitu 30 cm, 60 cm, dan 90 cm didapatkan hasil yaitu semakin dalam lubang resapan yang digunakan maka volume tampungannya semakin besar. Hal ini karena semakin dalam lubang resapan maka luasan penampang resapnya semakin besar sehingga semakin banyak juga daya resapnya, sedangkan waktu peresapan pada tanah liat berpasir lebih cepat dibandingkan dengan peresapan pada tanah liat berlumpur. Hal ini dikarenakan pori-pori tanah pada tanah liat berpasir cenderung lebih terbuka sehingga air dapat lebih cepat untuk meresap ke tanah
Modifikasi Alat Bending Pipe Automatis Dengan Penambahan Metode Rotary Draw Bending
No full textWith this pipe bending tool, it will make it easier to work or manufacture products whose type of work uses a pipe bending tool, such as in making tents, canopies, ellbows and others. As in the Plat and Pipe Workshop at the Department of Naval Architecture and Shipbuilding Engineering, Politeknik Negeri Bengalis, for now there is still no bending tool with the rotary draw bending method that is focused on bending local pipes, namely getting the desired special angles, therefore the author conveys the idea and design of the tool. pipe bender whose function is to facilitate pipe bending. In the planning process of making this pipe bending tool. can not be separated from the calculation, design, to assembly. From the tool to completion and the results of making this pipe bending tool, we can conclude how the manufacturing process has been determined according to calculations and planning
Conservation in an Islamic context a case study of Makkah
No full textThe Holy Qu’ rān contains many injunctions for Muslims to respect and conserve the natural environment but few address the built environment. Habitat at the time of the Prophet (PBOH) was in the vernacular and relatively impermanent. The first habitat was the cave, the second the tent and then simple flat roofed buildings of post and lintel construction made of mud and rubble. Later buildings were not indigenous but reflected the architectural styles and techniques of Muslim pilgrims from beyond the Arabian Peninsula. Permanent exotic buildings were later erected as reminders of holy places and events. This work advances a case to restore and preserve historic and religious sites in Makkah, Saudi Arabia. Makkah is the destination for millions of Muslim pilgrims who annually pay homage to Allah during the occasions of Hajj, Ramadan and Umra. The tranquillity and peaceful ambience that one associates with the holiest of Islamic experiences have, over the years, given way to jostling crowds of people who must be expediently housed, fed, transported, and protected. Due to the lack of planning and the insensitive but profitable development of the city, Makkah is in grave danger of becoming a bustling metropolis instead of a sanctuary where pilgrims gather to perform their religious rites and reaffirm their dedication to Allah. The author calls for professional planning and international cooperation to guide future development for this expanding and sensitive area. The author's ideas are grounded in practical and aesthetic study, therefore, the political, environmental and economic issues are examined in relationship to religious, historic and artistic values. The author makes proposals for a future Makkah that would provide pilgrims with the physical comforts, security, and serene environment they deserve—without destroying the city they came to visit. The author discusses preservation and conservation in the western world and the need for their acceptance in Muslim countries, the former being an aesthetic and intellectual concept sustained by law and the latter being the prescribed free expression of the individual unhindered by material considerations. Both worlds are rapidly being overwhelmed by materialism, but body, mind and spirit combine in making us aware of our surroundings and the way in what we see around us has come into being
LIFE CYCLE ASSESSMENT PROSES PENGADAAN BAHAN BAKU BATUBARA PEMBANGKIT LISTRIK TENAGA UAP TIDORE
No full textPenggunaan batubara dalam negeri didominasi oleh sektor pembangkit listrik tenaga uap (PLTU). Kegiatan pendistribusian batubara menuju PLTU merupakan salah satu kegiatan yang memberikan dampak adanya emisi dalam rantai pasokan batubara. Tujuan dari penelitian ini adalah mengidentifikasi aliran input-output pengadaan bahan baku batubara pembangkit listrik tenaga uap Tidore, menentukan besaran dampak emisi GRK dan asidifikasi proses pengadaan bahan baku batubara, serta menentukan upaya kegiatan untuk meminimalkan dampak emisi tersebut. Metode penelitian yang dilakukan menggunakan life cycle assessment yang terdiri dari tujuan dan ruang lingkup, analisis inventori, analisis dampak, dan interpretasi dampak. Penghitungan dampak emisi GRK dan asidifikas dilakukan berdasarkan unit fungsional jumlah batubara (ton) yang dipasok ke PLTU Tidore Kepulauan. Hasil dari penelitian ini mendapatkan potensi dampak emisi kegiatan pendistribusian dari tambang batubara ke jeti Bunati sebesar 46,40 kg-CO2eq/ton dan 4,52E-01kg-SO2eq/ton, jeti Bunati ke jeti Tidore sebesar 28944,40 kg-CO2eq/ton dan 462,41 kg-SO2eq/ton, jeti PLTU ke coal yard sebesar 1,29 kg-CO2eq/ton dan 1,26E-02 kg-SO2eq/ton. Rekomendasi yang diberikan untuk mereduksi emisi adalah substitusi bahan bakar yang lebih ramah lingkungan dengan cara cofiring serta meningkatkan efisiensi pada sistem transportasi laut dan menggantikan transportasi truk pengangkut batubara dengan overload conveyor
تحقيق النص في مخطوطات كتاب "قصيدة في الصوم" للشيخ الحاج محمد صالح بوغاه جريسيك: دراسة فيلولوجية
No full textمستخلص البحث
فيلولوجي هو تخصص يهتم بالماضي. عادة ما ينتقل في مجال الأعمال الأدبية الماضية ، سواء كان ذلك الشعر أو التاريخ أو النثر أو غير ذلك. فقه اللغة هي معرفة الأدب بمعنى واسع تغطي مجالات اللغة والأدب والثقافة. تحتوي المخطوطات أو المخطوطات على معلومات حول أفكار ومعرفة وتاريخ وعادات وسلوك كثير من الناس في الماضي. يقال إن المخطوطات تفتح عالمًا كاملاً من المعرفة عن الماضي في شكل أدب قديم. في إندونيسيا نفسها ، تراث المخطوطات كبير جدًا ، لكنه لا يزال غير متأثر بالشباب اليوم ، وخاصة تطبيق فقه اللغة في تحليل هذه المخطوطات. وبناءً على ذلك ، تهدف هذه الدراسة إلى وصف وتحرير مخطوطة قصيدة في الصوم من تأليف كياهي الحاج محمد صالح ثاني جريسيك. وبالتالي ، يمكن أن يكون هناك المزيد والمزيد من الدراسات فيلولوجية حول المخطوطات ، وخاصة المخطوطات في إندونيسيا ، لأنه نادرًا ما يتم إجراء البحوث فيلولوجية ، بحيث يمكن للباحثين إلهام علماء إنسانيين آخرين. الطريقة المستخدمة في هذه الدراسة هي المنهج الوصفي النوعي باستخدام مزيج من الأساليب المركبة التي يتم ملاحظتها بناءً على قواعد كتابة قواعد في الإملاء وقواعد نحو والصرف وطريقة الدراسة الأدبية مصحوبة بدراسات ميدانية. تشير نتائج هذه الدراسة إلى أن هناك ثلاث مخطوطات عثر عليها باحثون بمخطوطتين في نفس المكان ومخطوطة واحدة في مكان مختلف. من بين المخطوطات الثلاث التي وجدها الباحث ، هناك العديد من أوجه التشابه ، بما في ذلك المؤلف الأصلي للمخطوطة واللغة المستخدمة. ومع ذلك ، إذا تم تقديمه ، فإن المخطوطة الأولى بها نسبة عالية من الحقيقة ، تليها المخطوطة الثانية والثالثة لأن هناك العديد من محرري الكلمات المختلفين.
ABSTRACT
Philology is a discipline concerned with the past. Usually moves in the realm of past literary works, be it poetry, history, prose, and others. Philology is knowledge of literature in a broad sense covering the fields of language, literature and culture. Manuscripts or codices contain information about the thoughts, knowledge, history, customs and behavior of many people in the past. The manuscripts are said to be opening up a whole world of knowledge about the past in the form of ancient literature. In Indonesia itself, the legacy of manuscripts is very large, but it is still not touched by young people today, especially the application of philology in analyzing these manuscripts. Based on this, this study aims to describe and edit the manuscript of Qoshidah Fii Shaum by KH. Muhammad Sholeh Tsani Gresik. Thus, there can be more and more philological studies on manuscripts, especially manuscripts in Indonesia, because philological research is rarely carried out, so that researchers can inspire other humanists. The method used in this study is a descriptive qualitative method using a mixture of combined methods which are seen based on the Qowaid fii al imla' writing rules and the Nahwu Shorof rules and the literature study method accompanied by field studies. The results of this study indicate that there are three manuscripts found by researchers with two manuscripts in the same place and one manuscript in a different place. Of the three manuscripts found by the researcher, they have several similarities, including the original author of the manuscript and the language used. However, if it is presented, the first manuscript has a high percentage of truth, followed by the second and third manuscripts because there are several different word editors.
ABSTRAK
Filologi imerupakan isuatu idisiplin iilmu iyang iberkaitan idengan imasa ilampau. iBiasanya bergerak ipada iranah ikarya isastra ilampau, ibaik iitu ipuisi, isejarah, iprosa, idan ilainnya. Filologi iadalah ipengetahuan itentang isastra-sastra idalam iarti iluas imencakup ibidang ibahasa, sastra idan ikebudayaan. Manuskrip atau naskah kuno berisi informasi tentang pemikiran, pengetahuan, sejarah, kebiasaan, dan perilaku banyak orang di masa lalu. Manuskrip-manuskrip tersebut dikatakan sebagai pembuka seluruh dunia pengetahuan tentang masa lalu dalam bentuk sastra kuno. Di Indonesia sendiri peninggalan akan manuskrip sangat banyak sekali, akan tetapi masih kurang terjamah dikalangan pemuda saat ini, terutama penerapan ilmu filologi dalam menganalisis manuskrip tersebut. Berdasarkan pada hal tersebut maka penelitian ini bertujuan untuk mendeskripsikan dan menyunting manuskrip Qoshidah Fii Shaum Karya KH. Muhammad Sholeh Tsani Gresik. Dengan demikian, kajian filologi tentang manuskrip terutama manuskrip di Indonesia bisa semakin banyak dikarenakan masih jarang dilakukan penelitian filologi, sehingga peneliti bisa menginspirasi kepada budayawan lainnya. Metode yang dipakai dalam penelitian ini adalah metode kualitatif deskriptif dengan menggunakan campuran antara metode gabungan yang dilihat berdasarkan kaidah penulisan Qowaid fii al imla’ dan kaidah Nahwu Shorof dan metode studi pustaka disertai studi lapangan. Hasil penelitian ini menunjukkan bahwasannya terdapat tiga naskah yang ditemukan oleh peneliti dengan dua naskah terdapat di tempat yang sama dan satu naskah di tempat berbeda. Dari ketiga naskah yang ditemukan peneliti mempunyai beberapa kesamaan, diantaranya pengarang asli naskah dan bahr yang digunakan. Akan tetapi jika di presentase maka naskah pertama memiliki presentase kebenaran yang tinggi, disusul kemudian naskah kedua dan naskah ketiga dikarenakan terdapat beberapa redaksi kata yang berbeda
MAPPING THE GLOBAL LANDSCAPE OF STEM EDUCATION RESEARCH: A BIBLIOMETRIC ANALYSIS OF SCOPUS PUBLICATIONS (2010–2024)
No full textThis study explores the global research landscape of STEM education using a bibliometric analysis of publications indexed in Scopus from 2010 to 2024. A total of 1,148 documents from 466 different sources were analyzed with the support of VOSviewer and Biblioshiny to examine publication trends, productivity indicators, and keyword co-occurrence networks. The results reveal a steady increase in research output, beginning with fewer than 50 documents in 2010 and reaching more than 250 publications by 2024, which reflects the growing recognition of STEM education as an important area of academic inquiry. Productivity analysis shows that the United States is the most dominant contributor, particularly through institutions such as Texas A&M University and Purdue University, while significant contributions also come from China, Hong Kong, Malaysia, and Australia. At the author level, scholars such as Li Yeping, Morris Siu Yung Jong, and Lyn D. English are identified as influential in advancing the field. The keyword co-occurrence analysis identifies five thematic clusters, namely pedagogy and curriculum, technology integration, equity and sustainability, disciplinary approaches, and learning outcomes. These findings demonstrate that STEM education has become a multidisciplinary and collaborative field of research that is both pedagogically grounded and responsive to societal challenges, offering valuable insights for future research and policy
MARXIST CRITICISM ON DISNEY’S MOVIE CINDERELLA
No full textCinderella is a film made by Walt Disney based on European folk tale written by Charles Perrault in 1697. The film depicts the story of a girl who is bound by the oppressive behavior of the stepmother and step- sisters, who in continuation she wanted to change her fate in a single night. This book analyzes the film with marxist point of view. This book discussed about the class struggle, class and status, and false conciousnesswithin the movie. The author uses theories of Karl Marx to analyze the elements that contained in this film. In this analysis we can conclude that Cinderella is not just a regular animated movie but a movie full of Marxist elements
SISTEM INFORMASI PEMESANAN BARANG PADA CV RESTU PERDANA PALEMBANG BERBASIS WEB
No full textPesatnya perkembangan komputer dan teknologi informasi menjadi pemicu berbagai perusahaan untuk memanfaatkan sistem informasi berbasis dekstop maupun Web. CV. Restu Perdana Palembang pun membutuhkan sebuah sistem informasi untuk memperoleh peluang bersaing dan meningkatkan eksistensi perusahaan. Permasalahan yang dialami oleh CV. Restu Perdana Palembang yaitu belum adanya media pemasaran mengakibatkan sulitny perusahaan memasarkan produk maupun meningkatkan produktifitas, kurang cepat merespon keluhan pelanggan, dan kebutuhan pelanggan akan transaksi kapan saja dan di mana saja. Metodologi yang digunakan adalah RUP (Rational Unified Process) dengan metode iterasi. Implementasi desain program menggunakan bahasa PHP6, Sedangkan DBMS menggunakan MySQL. Dalam sistem informasi ini terdapat fungsi untuk Login dalam 2 versi yaitu pelanggan tetap dan pelanggan biasa ,register ,ubah password , pesan produk , tambah jumlah pesa produk ,cari produk input ,pembayaran ,tambah data admin ,tambah data produk ,input berita , input data produk ,input kritik dan saran . Dengan adanya sistem informasi pemesanan berbasis web ini dapat memberikan kemudahan dan meminimalkan kesalahan yang terjadi pada bagian administrasi serta stakeholders yang terkait dengan kegiatan pemesanan tersebu
