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A Short Note on Asteraceae as Traditional Food and Medicinal Plants in Cihanjawar Village, Purwakarta Regency, West Java
No full textAsteraceae is known as the largest family of flowering plants. Despite some species members being invasive plants, these species are often adopted and utilized by local community groups for food, traditional medicine, and other uses. In our ethnobotanical study of Asteraceae, we identified ways a local Sundanese community group in West Java utilizes a diverse range of species in the family for different purposes. Our study focuses on a Sundanese village called Cihanjawar, located in the regency of Purwakarta, using ethnobotany and ethnomedicine approaches. People of Cihanjawar utilize some species of Asteraceae for food as ‘lalapan’ and traditional medicinal purposes. In-depth, semi-structured interviews with the people of Cihanjawar were conducted to collect primary data regarding the utilization of Asteraceae species as food and traditional medicine. A total of eight species of Asteraceae were found during the field-guided exploration in Cihanjawar Village, which include Acmella paniculata, Ageratum conyzoides, Calyptocarpus vialis, Crassocephalum crepidioides, Dichrocepala integrifolia, Emilia sonchifolia, Erechtites valerianifolia, Sphagneticola trilobata, some of which are considered invasive alien species. The species of A. paniculata, C. crepidioides, E. sonchifolia, Er. valerianifolia is eaten as a raw food (lalapan, Ind.). Then Ag. Conyzoides and C. crepidioides are utilized in traditional medicine. C. vialis, D. integrifolia, and Sphagneticola trilobata are not used by the people of Cihanjawar as food or as traditional medicine
PERANCANGAN SIGN SYSTEM SEBAGAI MEDIA INFORMASI UNIVERSITAS PARAMADINA DI KAMPUS CIPAYUNG
Get PDFThe existence of a sign system in public spaces is crucial, not only as an information medium but also for playing a role in creating a conducive public environment and reinforcing the image of institutions, such as the Paramadina University campus in Cipayung. In its development, the Cipayung campus is projected to become the main campus of Paramadina University, requiring the incorporation of a sign system in the current construction of buildings. In the design process of the sign system, a concept is needed that can represent the vision and mission of the university or the values inherent in Paramadina, such as Islamic, Indonesian, and Modern values. This research aims to understand the process of designing a sign system using a descriptive-qualitative method. Data sources for this research were obtained through interviews, observations, and literature studies.
Keywords: Sign System, Information Media, Paramadina UniversityKeberadaan sign system diruang publik sangatlah penting, selain fungsi utamanya sebagai media informasi. Sign system juga bisa membantu menciptakan ruang publik yang kondusif dan juga menguatkan citra institusi salah satunya di lingkungan Universitas Paramadina kampus Cipayung. Dalam perkembanganya, kampus Cipayung diproyeksikan akan menjadi kampus utama dari Universitas Paramadina sehingga pembangunan gedung yang berjalan saat ini membutuhkan keberadaan sign system. Pada proses perancangan sign system, diperlukan konsep yang mampu mewakilkan visi dan misi Universitas atau nilai-nilai ke Paramadinaan seperti ke Islaman, ke Indonesiaan, dan ke Modernan. Penelitian ini bertujuan untuk mengetahui proses perancangan sign system dengan pendekatan metode deskriptif kualitatif. Adapun sumber data pada penelitian ini di dapat dengan cara wawancara, observasi dan studi literasi.
Kata kunci: Sign System, Media Informasi, Universitas Paramadin
Havanensin-type Limonoids from the Stem Bark of Chisocheton pentandrus (Meliaceae)
Get PDFA new limonoid, belonging to the havanensin-type, called pentandricine E (1), alongside four other known types, i.e., trichilenone acetate (2), toonaciliatones C (3), 11α-acetoxyazadirone (4) and ceramicine I (5), were found in Chisocheton pentandrus stem bark. The structures of the isolated 1-5 were identified by NMR spectroscopy and HRTOFMS. Pentandricine E (1) displayed the highest cytotoxicity toward the MCF-7 breast cancer line with an IC50 value of 63.27 ± 0.21 mM
A Review on Zeolite Application for Aromatic Production from Non-Petroleum Carbon-Based Resources
Get PDFThe application of zeolite catalyst has been expanded to support on-purpose sustainable technology. This review focused on zeolite application to produce aromatic compounds from non-petroleum carbon-based resources, including methanol, CO2, CO, and biomass. For COx resources, the two main routes for producing aromatics products are discussed, i.e., the olefinic and the oxygenates-mediated route. Moreover, several improvement strategies for enhancing catalytic performance are also discussed, i.e., the addition of metal components, tuning the metal and zeolite structure, and modifying the reaction process. Finally, prospects for future development are formulated
Emergency Data Transmission Mechanism in VANETs using Improved Restricted Greedy Forwarding (IRGF) Scheme
Get PDFOne of the most critical tasks in Vehicular Ad-hoc Networks (VANETs) is broadcasting Emergency Messages (EMs) at considerable data delivery rates (DDRs). The enhanced spider-web-like Transmission Mechanism for Emergency Data (TMED) is based on request spiders and authenticated spiders to create the shortest route path between the source vehicle and target vehicles. However, the adjacent allocation is based on the DDR only and it is not clear whether each adjacent vehicle is honest or not. Hence, in this article, the Improved Restricted Greedy Forwarding (IRGF) scheme is proposed for adjacent allocation with the help of trust computation in TMED. The trust and reputation score value of each adjacent vehicle is estimated based on successfully broadcast emergency data. The vehicles’ position, velocity, direction, density, and the reputation score, are fed to a fuzzy logic (FL) scheme, which selects the most trusted adjacent node as the forwarding node for broadcasting the EM to the destination vehicles. Finally, the simulation results illustrate the TMED-IRGF model’s efficiency compared to state-of-the-art models in terms of different network metrics
Analytical Approach to Parameter Determination in Kaiser Function for Power-weighted Antenna Array Design
Get PDFWindow methods that are frequently used in the design of finite impulse response filters are also applicable to antenna array designs. This paper explores the application of a Kaiser function in a power-weighted antenna array design, focusing on the determination of the Kaiser function’s β parameter. The determination, which includes the calculation, optimization, and validation of the β parameter, was carried out based on a specific configuration of a linear antenna array design. The observation of this exploration emphasized the suppression of the sidelobe level (SLL) and the width of main lobe (WML) performance. By changing the β parameter, the Kaiser function is capable of approximating different window methods, since it plays an important role in defining the set of weighting coefficients for a specifically targeted SLL. Kaiser function application in power-weighted antenna array designs with a linear arrangement indicates the need of β parameter optimization because of the disagreement between the obtained SLL and the targeted SLL. The optimized β parameter produced a smaller SLL error for even and odd numbers of elements. From the validation, the average SLL error percentage for a targeted SLL of 25 dB, 35 dB, and 45 dB was 6%, 4.31%, 6.10%, respectively
Studi Analisis Stabilitas Tubuh Bendungan pada Bendungan pada Bendungan Banyu Urip dengan menggunakan software Geostudio 2018 di Kabupaten Bojonegoro Jawa Timur
No full textAbstrak
Tubuh bendungan merupakan bagian paling penting yang berfungsi sebagai penyangga aliran air dan rembesan. Bendungan urugan tipe zonal harus dianalisis berdasarkan desain zona-zona penyusun tubuh bendungan. Karena besarnya rembesan dan nilai keamanan strabilitas bendungan dipengaruhi oleh besar ketebalan zona-zona tubuh bendungan. Pada penelitian ini bertujuan menganalisa stabilitas tubuh bendungan Banyu terhadap kelongsoran lereng dan rembesan air. . Analisis stabilitas tubuh bendungan menggunakan metode Simplified Bishop dimana akan dibandingkan antara perhitungan manual dengan menggunakan Software Geostudio. Hasil analisis Geoslope menunjukan bahwa bagian hulu bendungan menghasilkan nilai FS 3,021 > 1,50 dan adanya pengaruh gempa menghasilkan FS 1,633 > 1,20. Untuk nilai FS pada rapid draw down hulu bendungan menghasilkan nilai FS 3,234 > 1,30 dan adanya pengaruh gempa menghasilkan FS 1,718 > 1,10. Dengan demikian bendungan dinyatakan aman kestabilannya pada kondisi setelah selesai konstruksi (tanpa genangan air), muka air normal, muka air banjir, rapid draw down dan adanya pengaruh gempa pada Y/H: 0,25; 0,50; 0,75; 1,00.
Kata-kata Kunci: Gempa, tanah lempung, analisis stabilitas slope/W, metode bishop, goestudio
Abstract
The body of the dam is the most important part that serves as a buffer for water flow and seepage. Zonal type urugan dams should be analyzed based on the design of the constituent zones of the dam body. Due to the magnitude of seepage and the safety value of the dam's strability, it is influenced by the thickness of the dam body zones. This study aims to analyze the stability of the Banyu dam body against slope landslides and water seepage. . Analysis of the stability of the dam body using the Simplified Bishop method which will be compared between manual calculations using Geostudio Software. The results of Geoslope analysis showed that the upstream part of the dam produced FS values of 3.021 > 1.50 and the influence of the earthquake produced FS 1.633 > 1.20. For the FS value in the rapid draw down upstream of the dam produced an FS value of 3.234 > 1.30 and the influence of the earthquake resulted in FS 1.718 > 1.10. Thus the dam is declared safe stability in conditions after completion of construction (without waterlogging), normal water level, flood water level, rapid draw down and the influence of earthquakes on Y/H: 0.25; 0,50; 0,75; 1,00.
Keywords: Earthquake, clay, slope/W stability analysis, bishop method, goestudio
Flood Modeling on the Dadap River and Estuary, Banten Province
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Dadap River is located in Kosambi, Tanggerang, which often experiences flooding in the estuary. The problem of flooding is caused by the lack of rivers capacity and estuaries caused by sedimentation and tidal conditions. The flooding caused damage to city infrastructure and paralyzed the activities of the affected residents. The Dadap River was normalized in 2012 to overcome the flooding problems. This study aims to determine the capacity of rivers and estuaries as an alternative solution for flood management. Simulations were carried out in conditions before and after normalization and with alternative embankment elevations. Flood modeling using the HEC-RAS 1D unsteady flow. Boundary conditions in the upstream using flood discharge with a 50 and 100 yr return period and downstream using HHWL elevation and wave height. The analysis results show that the capacity of the Dadap River before normalization was not able to accommodate flood discharge at the 50 and 100 yr return period. After normalization, the water surface elevation may decrease by 24-29%. However, there is still flooding downstream due to the tides, so raising the embankment elevation of +3.5 m.
Keywords: Dadap river, estuary, flood, normalization, HEC-RAS
Abtsrak
Kali Dadap sering mengalami banjir di bagian muara. Kali Dadap terletak di Kecamatan Kosambi, Kabupaten Tanggerang. Permasalahan banjir di Kali Dadap disebabkan oleh berkurangnya kapasitas sungai dan muara yang disebabkan oleh sedimentasi dan pengaruh oleh kondisi pasang pasang surut. Banjir yang terjadi menyebabkan rusaknya prasarana kota serta melumpuhkan aktivitas warga yang terdampak. Kali Dadap telah dilakukan normalisasi pada tahun 2012 untuk mengatasi permalahan banjir yang terjadi. Tujuan dari studi ini yaitu untuk mengetahui kapasitas kali dan muara Dadap serta sebagai alternatif solusi penanganan banjir. Simulasi pemodelan banjir dilakukan pada kondisi sebelum dan sesudah dinormalisasi serta dengan alternatif peninggian tanggul. Pemodelan banjir dilakukan menggunakan aplikasi HEC-RAS 1D aliran unsteady. Pemodelan akan dilakukan dengan kondisi batas di bagian hulu menggunakan debit banjir dengan kala ulang 50 dan 100 tahun dan di bagian hilir menggunakan elevasi HHWL dan tinggi gelombang. Hasil analisis menunjukkan bahwa kapasitas Kali Dadap sebelum di normalisasi tidak mampu mengalirkan debit banjir kala ulang 50 dan 100 tahun. Setelah dilakukan normalisasi pada Kali Dadap, elevasi muka air dapat menurun sekitar 24 -29% tetapi masih terjadi banjir pada bagian hilir akibat pasang surut sehingga perlu adanya peninggian elevasi tanggul yaitu +3.5 m.
Kata Kunci: Kali Dadap, muara Dadap, banjir, normalisasi, HEC-RAS
 
Simulasi Dinamik Pengoperasian Kompresor Sentrifugal Multitahap untuk Mengatasi Penurunan Tekanan Sumur Gas
Get PDFCurrently, the utilization of natural gas as an energy source needs to be optimized due to its increasing demand. The utilization of natural gas to produce LNG requires a high-pressure operating system of 1000 psig. The installation of a multistage centrifugal compressor unit is essential to maintain the operating pressure when there is a decrease in the feed gas pressure from natural gas wells. This study aims to predict the performance of the compressor that would be used and optimize the compressor operating conditions to satisfy the specifications of the gas selling pressure. In this study, simulations were conducted on how to maintain the stability of the feed operating pressure in the case of a drop in the gas source pressure from 1000 psig to 200 psig over a period of 15 years. Herein, the gas flow rate under normal conditions is 80 MMSCFD with a gas flow rate variation under surge (minimum) and maximum conditions of 110% × normal flow rate. By using the compressor map prediction curve and Hysys simulation under dynamic conditions, the compressor performance can be analyzed and then used for process requirements in the field.Dewasa ini pemanfaatan gas alam sebagai sumber energi perlu dioptimalkan karena kebutuhannya yang meningkat. Pemanfaatan gas alam untuk memproduksi LNG memerlukan sistem operasi bertekanan tinggi yaitu 1000 psig. Pemasangan unit kompresor sentrifugal multitahap mutlak diperlukan untuk dapat menjaga tekanan operasi saat terjadi penurunan tekanan gas umpan pada sumur-sumur gas alam. Penelitian ini bertujuan untuk memprediksi kinerja kompresor yang akan digunakan serta mengoptimasi kondisi operasi kompresor agar memenuhi spesifikasi tekanan gas jual. Dalam kajian ini, dilakukan simulasi bagaimana mempertahankan kestabilan tekanan operasi umpan untuk kasus penurunan tekanan sumber gas dari 1000 psig hingga 200 psig dalam kurun waktu 15 tahun. Laju alir gas pada kondisi normal adalah 80 MMSCFD dengan variasi laju gas pada kondisi surge (minimum) dan kondisi maksimum sebesar 110% × laju alir normal. Dengan menggunakan kurva prediksi peta kompresi dan simulasi Hysys pada kondisi dinamik, kinerja kompresor dapat dianalisis dan kemudian dapat digunakan untuk kebutuhan proses di lapangan
Physical and Chemical Properties of Indonesian Coffee Beans for Different Postharvest Processing Methods
Get PDFThe purpose of this study was to identify the physical and chemical properties of Indonesian coffee beans for different postharvesting methods after being roasted. Several types of Indonesian export coffee, i.e., Gayo Luwak coffee, Wamena coffee, Toraja coffee, Gayo coffee, Flores coffee and Kintamani coffee, were used in the present study. Each coffee has its own aroma and taste according to the location, soil type, and land elevation. The roasting process started with preheating the roasting machine, after which the samples were roasted for about 15 minutes at 215℃ to obtain the medium-to-dark (MTD) roasting level. The physical properties measured included density, mass loss, porosity, water content, and morphology using a scanning electron microscope. The transmittance spectrum was observed by Fourier transform infrared spectroscopy (FTIR). The physical properties of the coffee were successfully measured. The bulk density varied from 0.6 to 0.7 g/cm3, and particle density was about 0.9 g/cm3 for green beans. The roasting process reduced the bulk and particle density to 0.3 g/cm3 on average and 0.8 g/cm3, respectively. The fully-washed condition gave an overlapping spectrum for green and roasted beans, which shows that the roasting process did not affect the spectrum. The results can be used to study the coffee quality resulting from different postharvest processing methods