cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Andri Rahman
Contact Email
andri.agus.rahman@lipi.go.id
Phone
-
Journal Mail Official
widyariset@mail.lipi.go.id
Editorial Address
Pusbindiklat LIPI, Jl. Raya Bogor Km. 46, Cibinong Science Center, Cibinong - Bogor 16911
Location
Kab. bogor,
Jawa barat
INDONESIA
Widyariset
Published by Pusbindiklat Peneliti LIPI
ISSN : -     EISSN : 24610976     DOI : 10.14203
Core Subject : Science, Engineering,
Aerospace Engineering Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Immunology & microbiology Industrial & Manufacturing Engineering Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics
Widyariset is a scientific journal which publishes the results of research and development, assessment, and systematic thinking about Natural Science.
Arjuna Subject : Umum - Umum
Articles 5 Documents
 1 
Search results for , issue "Vol 6, No 1 (2020): Widyariset" : 5 Documents clear
Electrochemical Performance of Li4-xTi5CuxO12 for Lithium Ion Capacitor Applications Ahmad Sohib; Achmad Subhan; Wahyu Bambang Widayatno; Slamet Priyono; Chairul Hudaya; Ilma Nuroniah; Sherly Novia Sari; Bambang Prihandoko
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.43-50

Abstract

Lithium titanat (LTO) has attracted considerable attention since it has unique characteristics for energy storage application. Doped LTO is one of approach to improve LTO performance. To date, doped LTO performance in full cell lithium ion capacitor has rarely been discussed. This study is aimed to synthesize Cu-doped LTO via solid state reaction and high energy milling and investigate its electrochemical performance in full cell of lithium ion capacitor. Cu-doped LTO is synthesized via solid state method with high energy milling. Diffraction pattern exhibit that Cu-doped LTO has been successfully synthesized even some impurities such as Baddeleyite, ZrO2, and Li2O appear in each sample. Cyclic voltammogram profile of half-cell based Cu-doped LTO shows that the oxidation and reduction peaks are declined due to its impurities contain. electrical resistance of LTO and Cu-doped LTO becomes smaller as increasing dopant contain while charge transfer resistance is higher. Full cell performance of LIC represent that undoped  LTO//Activated carbon shows higher capacitance, namely 430 µFg-1 at specific current of 50 mAg-1than that of 2.5%-Cu-doped LTO//AC holds 15 µFg-1.
DETEKSI TEPI UNTUK VALIDASI MODEL TIGA DIMENSI TULANG PANGGUL PADA PERENCANAAN DESAIN IMPLAN Talitha Asmaria; Rafidah Rahmi; Muhammad Satrio Utomo; Dhyah Annur; Daniel Panghihutan Malau; Muhamad Ikhlasul Amal; Ika Kartika
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.51-61

Abstract

In the process of implant design and fabrication planning, the anatomical background of human bone is an important aspect to determine the accuracy of implant design. To help in understanding the human bone anatomy, replicas of human bone can be reconstructed using three-dimensional (3D) printing technology. This study aims to validate the digital model of human bone and the imaging data of human bone in order to have an appropriate recommendation for designing the total hip replacement (THR). Achieved data from computed tomography scanning (CT-Scan) modality was deciphered to build the digital 3D model human bone. The bone and the digital 3D model of bone were captured to be two-dimensional(2D) data in the same dimension and processed using the algorithm of edge detection. The images from the edge detection process were processed for finding the similarity of the images. The percentage of similarity, precision, and  accuracy between the bone and the digital 3D model have been validated and can be used as a reference in the THR designs.
Optimalisasi Lateks Tetesan Lanjut Menggunakan Berbagai Koagulan Anjuran Afrizal Vachlepi
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.1-21

Abstract

Natural rubber latex will coagulate naturally about 4-6 hours after tapping. This coagulation will produce low quality rubber and inconsistent. In addition, latex will be easily lost by rain because long coagulation time, especially continuous latex droplet. The use of coagulant in the continuous latex droplet can reduce yield losses and improve quality. The purposes were to identify and study the effect of coagulants on the dry rubber content and technical quality of the rubber from continuous latex droplet of clone BPM 24. The treatments was type of coagulants consist of formic acid, pure liquid smoke, liquid smoke DS, liquid smoke DK and control (auto coagulation). Each treatment use 10 rubber tree of clone BPM 24. The parameters consists of dry rubber content, initial plasticity (Po), plasticity retention index (PRI), Mooney viscosity, viscosity stability index (SVI), volatile matter content and ash content. The quality will be analyzed statistically using the completely randomized design non factorial and will be compared with Indonesian National Standard 06-1903-2000 about Standard Indonesian Rubber (SIR). The results showed that the use of coagulant to continuous latex droplet had significant effect on PRI and Mooney viscosity of rubber. The best treatment was obtained liquid smoke DS which produce rubber with quality standards for Po 36, PRI 80.8, Mooney viscosity 68, SVI 4, ash content 0.27% and volatile matter content 0.48%. The coagulated natural rubber with liquid smoke DS can produce rubber with quality specifications SIR 20 grade CV 70.
Eddy Currents Variablity from Satellite Altimetry and Its Relation to Physical Conditions of Java Sea Kautsar Fadlih Akbar; Ahmad Bayhaqi; Khikmah Muliati; Denny Darmawan
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.22-28

Abstract

Current pattern in Java Sea highly depends on monsoonal cycles, which create alternating conditions according to the seasons throughout the year and potential impacts on eddy currents variability. Using the surface geostrophic current data from satellite altimetry during 2013-2017, this study aims to understand the variability of eddy currents and its relations to the physical condition of the Java Sea such as sea surface temperature (SST), sea surface height (SSH), and chlorophyll-a concentration (CHL). Results showed 60 occurrence of eddy currents in the study area, 40 cyclonic and 20 anticyclonic. The largest cyclonic eddy observed in April 2013 (112.05, -5.37) with a diameter of 134.07 km, while the largest anticyclonic eddy observed in October 2017 (114.54, -6.24) with a diameter of 159.69 km. Cyclonic eddy has lower SSH and cold core while anticyclonic eddy has higher SSH and warm core. Despite having an unclear pattern during the five years period, the occurence of Eddy current has a potentially indirect influence on Chl-a concentration.
FAKTOR PENGUNGKIT DAN STRATEGI PENINGKATAN PENGELOLAAN LINGKUNGAN OLEH PERKEBUNAN DAN PABRIK KELAPA SAWIT DI KABUPATEN BATANG HARI novia susianti; Sukmal Fahri; Abdul Salam Lubis
Widyariset Vol 6, No 1 (2020): Widyariset
Publisher : Pusbindiklat - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/widyariset.6.1.2020.29-42

Abstract

Environmental management by the oil palm plantation industry has become a necessity in minimizing negative impacts on the environment that have emerged from the construction to the operation stage. The government has made a preventive effort by requiring every industry performer to manage the environment by following the ownership of the company's environmental documents. However, in reality, there are still companies that have not implemented this effort, including in Batang Hari Regency as the regency with the highest number of oil palm companies in Jambi Province. This study aims to identify the lever factors and environmental management strategies by oil palm industry players in Batang Hari District. Data collection was carried out through in-depth interviews with the government, companies and village communities in the study areas, document review, observation, and focus discussion group (FGD) to the district, sub-district and village government research sites. The determination of priority levers is done by determining the important levers first with an average criterion of ≥75%, followed by fit/gap analysis by mapping important factors in quadrant I, and strategies to improve environmental management efforts are carried out using a prospective promethee analysis. The results showed that there were three priority lever factors and six factors that were advantages to improve environmental management. The strategy through the Walfare Pluralism (WP) approach is the best approach with the support of the contribution of the nine factors. This approach emphasizes the role of government, companies and communities through the principle of a five-sector approach (public sector, private sector, voluntary sector, mutual aid, and informal sector) in improving environmental management.

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2020 2020


Reset
Filter By Issues
All Issue Vol 8, No 1 (2022): Widyariset Vol 6, No 2 (2020): Widyariset Vol 6, No 1 (2020): Widyariset Vol 5, No 2 (2019): Widyariset Vol 5, No 1 (2019): Widyariset Vol 4, No 2 (2018): Widyariset Vol 4, No 1 (2018): Widyariset Vol 3, No 2 (2017): Widyariset Vol 3, No 1 (2017): Widyariset Vol 2, No 2 (2016): Widyariset Vol 2, No 1 (2016): Widyariset Vol 18, No 2 (2015): Widyariset Vol 18, No 1 (2015): Widyariset Vol 1, No 1 (2015): Widyariset Vol 17, No 3 (2014): Widyariset Vol 17, No 2 (2014): Widyariset Vol 17, No 1 (2014): Widyariset Vol 16, No 3 (2013): Widyariset Vol 16, No 2 (2013): Widyariset Vol 16, No 1 (2013): Widyariset Vol 15, No 3 (2012): Widyariset Vol 15, No 2 (2012): Widyariset Vol 15, No 1 (2012): Widyariset Vol 14, No 3 (2011): Widyariset Vol 14, No 2 (2011): Widyariset Vol 14, No 1 (2011): Widyariset Vol 13, No 3 (2010): Widyariset Vol 13, No 2 (2010): Widyariset Vol 13, No 1 (2010): Widyariset Vol 12, No 3 (2009): Widyariset Vol 12, No 1 (2009): Widyariset More Issue