Indonesia Conference Directory

Corresponding Author
Syafrizal Syafrizal

Institutions
Earth Resources Exploration Research Group, Faculty of Mining and Petroleum Engineering, Institut Teknologi Bandung, Bandung, Indonesia

Abstract
Three vein zones hosting gold mineralization have been outlined at the Poboya prospect, named as the River Reef Zone, the Hill Reef 1 Zone, and the Hill Reef 2 Zone. The vein zones were observed within metamorphic rocks leading to an issue regarding classification of the deposit type and exploration of the gold deposit. Macroscopic observation on considerable number of veins collected from the Hill Reef 1 and Hill Reef 2 Zones show that the vein textures consist of massive chalcedony, massive quartz, massive carbonate, banded chalcedony, colloform, crustiform, cockade, and lattice textures. These textures represent primary growth and replacement textural groups, which are similar to the vein textures observed at the River Reef Zone. Accordingly, the gold mineralization at the Hill Reef 1 and Hill Reef 2 Zones can be classified as a low-sulfidation epithermal deposit. In addition, the predominance of massive and lattice textures in the surface indicate that the veins analyzed in this study are from Chalcedonic Superzone and gold mineralization at the Hill Reef 1 and Hill Reef 2 Zones are well preserved.

Keywords
Epithermal, low-sulfidation, gold mineralization, vein textures

Topic
Mining and Metallurgy Engineering

Link: https://ifory.id/abstract/vmXqZ9TBHnPy

Corresponding Author
modawy abdelgader

Institutions
Faculty Of Animal Husbandry, University of Jenderal Soedirman

Abstract
Molasses can be a source of quick energy and an excellent source of minerals for farm animals and even chickens. Molasses can also be a key ingredient for cost effective management of feeds. The purpose of this research was to study the impact of adding different levels of sugar beet molasses to feed on performance of broilers chickens. Used 112 of commercial broiler (Ross 308) l-day-old chicks were weighed in gram live weight ranged between 50-57g and subsequently placed in the treatment groups in such a way that the mean weights differed as little as possible, chicks divided into four groups replicates of 7 chicks each and reared on deep litter in open housing system. Four replicates were designed to each dietary treatment. at 15-days-old chicks, the unsexed broiler chickens were randomly allotted to four groups of 7 birds each. The four diets consisted of Group (A) as a control diet containing no Molasses, Group (B) was 5 %, Group (C) 7.5 % and Group (D)10%. Feed and water were provided adlibtum. There were no significant differences at all level (P<0.05) of adding beet molasses as source of energy among four experimental groups for the parameter studied: body weight, body weight gain, feed intake and feed conversion, also there is no mortality however, Use of beet molasses in broiler diets reduced feed cost and feeding of 7.5 % beet molasses decreased cost of feed per kg versus control and increase profitability. Keywords: beet molasses, broiler chickens, performance

Keywords
beet molasses, broiler chickens, performance

Topic
Feeds, feeding, and animal nutrition

Link: https://ifory.id/abstract/V7naUd3k92j8

Corresponding Author
Muhammad Salah

Institutions
1Faculty of Animal Production, University Of Khartoum, Department Of Poultry Production, Sudan
2Faculty of Animal and Agricultural Sciences, Diponegoro University.Indonesia

Abstract
The purposes of this experiment were to study the effect of three different environmental conditions (hot, cool, and natural) in the chicken behavior as indicated by duration of tonic immobility, and the role of dietary nucleotide supplementation on the elevate the stress. A total of 165 unsexed commercial chickens at fourteen-day of age were divided into three different environmental conditions; hot environment (H) with ambient temperature 31±1°C, comfortable environment (C) with ambient temperature 23 ±1°C, and natural environment (N). The chicken in Every environment condition received a basal diet supplemented with three levels of nucleotide (0 mg/kg) as a control group (T0), T1; 1000 mg/kg, and T2; 500 mg/kg. Birds were fed ad libitum until slaughter at 35 day. The duration of tonic immobility was evaluated two times on age 25 day and 34 day. The result of this study revealed that chicken reared under high temperature (hot and natural environment) increase the duration of tonic immobility compare with chickens rear under comfortable condition. The supplementation of dietary nucleotide has no effect on reducing the stress behavior.

Keywords
Environment, Nucleotide, Stress, Tonic immobility

Topic
Feeds, feeding, and animal nutrition

Link: https://ifory.id/abstract/B8dxGn4JENFz

Corresponding Author
Nor Nadiha Zaki

Institutions
1Halal Products Research Institute, Universiti Putra Malaysia
2Food Science and Technology, Universiti Putra Malaysia

Abstract
Local production of agricultural waste is increasing. It is not fully utilized and can cause an environmental issue if it is not handle wisely. Thus, it is important to increase utilization of lignocellulosic biomass by improving their added value and subsequently decrease the agriculture waste. In this study, rice straw and Leucaena leucocephala were subjected to alkali treatment (4% sodium hydroxide) such with different concentration ratio of sampel to sodium hydroxide (1:10 to 1:50). The physical and chemical properties of extracted hemicelluloses were studied. The yield of hemicellulose was higher from rice straw compared to Leucaena l.. The chemical functional groups present in hemicellulose were confirmed by Fourier tranform infrared spectroscopy (FTIR). The surface morphology and roughnesses of xylan were examined by scanning electron microscopy (SEM).

Keywords
rice straw, hemicellulose, sodium hydroxide, alkali

Topic
Halal Science and Technology

Link: https://ifory.id/abstract/TdCMP92v87Hj

Corresponding Author
Nurma Yunita Indriyanti

Institutions
Chemistry Education Department, Universitas Sebelas Maret

Abstract
This study aims to: (1) have a profile of students scientific reasoning of high school students in science program; (2) to investigate the relation of students scientific reasoning ability with understanding of chemical triangle representation of students on salt hydrolysis topic of grade science program in High School. This research used descriptive qualitative method. In this research, there are five levels of scientific reasoning: level No Response, Non-normative, General Descriptive, Bronsted Mechanistic and Bronsted Causal. Students scientific reasoning was measured using open-ended test. The determination of each level was determined by two ratters using the Cohen-s Kappa formula, in which the results of reliability for scientific reasoning, 0.95. Participants of this study as many as ninety 10th grade students in one public high school in Surakarta, Indonesia. Data collection techniques include written test, observations and interviews. Based on the results of the study showed that, (1) Profile of students scientific reasoning at General Descriptive level of 40%, Non-normative level of 33%, Bronsted Causal level of 26%, Response level of 1% and Bronsted Mechanistic level of 0%. The most of students have General Descriptive level, where the students- answer is only at the "What" stage hydrolysis occurs in general or using Bronsted-lowry theory. (2) not all levels of scientific reasoning have a understanding of the overall triangle representation (M-SM-S), but the understanding the overall chemical triangle representation (M-SM-S) can inducing good scientific reasoning.

Keywords
scientific reasoning, high school students, chemistry representation

Topic
Chemistry Education

Link: https://ifory.id/abstract/ykAbN9GM2g8v

Corresponding Author
Faryad Ali

Institutions
Al-Imam Mohammad Ibn Saud Islamic University (IMSIU),
Riyadh 11623,
Kingdom of Saudi Arabia

Abstract
The projective special orthogonal group $PSO^+_8( 3) cong O^+_8(3).2_1$ is a group obtained from the special orthogonal group $SO_8(3)$ on factoring by the group of scalar matrices it contains. The group $PSO^+_8( 3)$ has a maximal subgroup of the form $2^6{cdot}S_8$ with index $3838185$. The group $ar{Q}cong 2^6{cdot}S_8$ is a non-split group extension of an elemenrary abelian $2$-group of order $64$ by the symmetric group $S_8$. In the present article, we construct the non-split extension $ar{Q}$ and compute its character table by using the Fischer-Clifford matrices.

Keywords
Fischer matrices; Non-split extension; Character table

Topic
Applied Mathematics

Link: https://ifory.id/abstract/u4ZyLqYG7bDr

Corresponding Author
Vina Serevina

Institutions
State University of Jakarta

Abstract
This research aims to develop E-learning on thermodynamics subject to increase analytical skill of students. E-learning can be accessed via computer or smartphone. Thermodynamics is a subject which learned the relationship between heat and work also properties that support those relationship. This research method used ADDIE method: Analyze, Design, Development, Implementation, and Evaluation. Research was conducted in Laboratory of Media State University of Jakarta for six months, from October 2018 to April 2019 with physics education students of State University of Jakarta as object of research. Students analitycal skill improvement test was conducted by pre-test and post-test in two classes (class A and class B). Analytical skill is an ability to identify, separate, and distinguish components or elements of a fact, concept, opinion, assumption, conclusion and to check every components to see whether there is a contradiction. Material expert validation results show 91,28%,media expert validation 91,11%,learning expert 91,85%. N-gain test show a score 0,67 (medium category) for class A and 0,5 (medium category) for class B. Conclusion of this research is developed E-learning can increase Analytical Skill of Students.

Keywords
Development of E-Learning, Thermodynamics, Analytical Skill

Topic
Physics Education

Link: https://ifory.id/abstract/ENchfxaC78mk

Corresponding Author
Vina Serevina

Institutions
State University of Jakarta

Abstract
This study aimed to determine the application of guided inquiry learning models to improve student learning outcomes at class XI Mathematics and Natural Sciences 2, in 42 Public High School, Jakadrta. The research method used classroom action research. This research was conducted in two cycles, where each cycle consisted of planning, implementation, observation, and reflection. The minimum completeness criteria (KKM) indicators of learning outcomes that must be achieved are 70 with affective, cognitive, and psychomotor domains. The results showed that the average score increased in all three domains. The results of this study indicate that the average score of student learning outcomes in the affective domain of the first cycle is 68.73%, the cognitive domain of the first cycle is 60.33%, and the psychomotor domain of the first cycle is 70.17%. While the average score of affective domain student learning outcomes from the second cycle 72.33%, the cognitive domain of the second cycle 78.23%, and the psychomotor domain of the second cycle 76.61%. Based on these results, it can be concluded that the application of a guided inquiry learning model can improve student learning outcomes.

Keywords
guided inquiry learning model, learning outcomes

Topic
Physics Education

Link: https://ifory.id/abstract/EH3TYBM7cb6N

Corresponding Author
Eka Yuliana Agustin

Institutions
(a) Departmen of Physics, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia
(b) Advance Material and Mineral Laboratory, Faculty of Mathematics and Science, Universitas Negeri Malang, Malang, 65115, Indonesia

Abstract
In the past few decades studies of rock magnetism can be used to various problems, such as the study of magnetism for detecting pollution in agriculture soil, as well as rivers and lakes sediments. In this study, rock magnetic methods were used to study magnetic properties of bus bottom ash. This research was conducted with the aim of developing new methods to determine the level of exhaust emissions of bus and others. Sampling was carried out by scrapping the exhaust tube of the bus on two different types of buses, i.e. 35 samples on public buses and 14 samples on tourism buses. Samples were tested to determine the elements with XRF and magnetic susceptibility test using Bartington MS2B. The measurement results shows that the elemental content found in bottom ash samples, among others, Fe 18.6 - 72.01%, Mo 10-47%, S 7-24.5%, Ca 0.53-24.7%, P 0 , 9-2.9%, Zn 0.38-2.99%, Ni 0.07-0.28%, Cu 0.17-0.4%, Mn 0.09-0.5%, Cr 0.1 -0.5%, Ti 0.16 -1,1%, Re 0.2-0.3%, 0.06-0.6%. The value of low frequency magnetic susceptibility (χlf) the public bus samples have a range (4.00 - 343.77) x 10−8 m3/kg with an average of 46.31 x 10−8 m3/kg with an average of χfd of 3.45%. The tourism bus emission samples has a range between (5.19 - 146.37) × 10−8 m3/kg with an average of 51,880 x10-8 m3/kg with an average χfd of 3.68%. The types of magnetic minerals found on public and tourism buses imply ferrimagnetic minerals with superparamagnetic (SP) and stable single domain (SSD).

Keywords
Bottom Ash; Magnetic Susceptibility; chemical Elements

Topic
Environmental Magnetism

Link: https://ifory.id/abstract/ZPxXwtcy8gmE

Corresponding Author
meifida ilyas

Institutions
Universitas Satya Negara Indonesia Jakarta

Abstract
Laut tawar Lake is a tourist attraction located in the Indonesian province of Aceh that has been visited by more than 1,000 tourists during 2018 (www.lintasgayo.com, 2018), in contrast to the attractions of Lake Toba located in the Indonesian province of North Sumatra, more than 381,643 visited during 2018 (www.medanbisnisdaily, com 2018.). The number of tourist visits to tourist destinations to these 2 lakes has contributed to achieving the target of foreign tourist arrivals in Indonesia, which exceeds 12 million (www.kemenpar.go.id, 2018). But the difference in visits by tourists to the two tourist destinations is interesting to examine how the attitude of the residents around the tourist destination to support for the development of future tourism. The research data was collected through distributing questionnaires to residents around freshwater lake and Toba Lake tourist destinations, population samples as many as 139 were obtained for residents around Laut tawar lakes and 174 for residents around Toba Lake using convenience techniques. The research instrument refers to the instrument developed by McGhee and Anderect (2004), namely 5 Likert scales for 5 issues of residents attitudes in tourism development, namely (1) tourism negative impacts, (2) tourism positive impacts, (3) personal benefits from tourism, (4) Support for increased tourism, (5) support for tourism plans. The results of this study showed that the characteristics of the respondents personnel had no effect on the attitude of the tourism negative impact and the tourism positive impact. The personal benefits from tourism is negatively effect on the tourism negative impact, but have a positive effect on the tourism positive impact. Personal benefits from tourism and tourism positive impact affect support for tourism development, while the tourism negative impact negatively affect support for increased tourism. There are differences in attitudes between residents around the Laut tawar and Toba Lakes in support for tourism development, this Phenomena supported the social exchange theory that the change of tourism development lead change the resident perception (Ap. J : 1992).

Keywords
Tourism development, Personal-benefit tourism, Tourism negative impact, Tourism positive impact, support for increased tourism.

Topic
Tourism and Hospitality Management

Link: https://ifory.id/abstract/9g4GJQWxrfu7

Corresponding Author
herliansyah yudhi

Institutions
Universitas Mercubuana Jakarta

Abstract
Little studies examined residence perceptions about the Sustainability Tourism Initiative in developing countries, especially in Indonesia. This study aims to examine whether economic, social and environmental factors are important factors in the residence perceptions of a Kepulauan Seribu tourist destinations. 37 respondents of this study were residents of 2 tourist destinations in the Kepulauan Seribu, namely Ayer and Bidadari Islands. The analysis used in this study is Important-Performance Analysis (IPA). The results of the study show that there is no significant difference in how well the implementation of sustainability tourism initiatives are economic aspects and environmental aspects, but this study finds evidence that there are differences in the implementation of social aspects. This research also shows the importance of each aspect higher than the performance of each aspect.

Keywords
Sustainability Tourism Initiative, Ayer and Bidadari Islands, Important-Performance Analysis

Topic
Tourism and Hospitality Management

Link: https://ifory.id/abstract/cWuakmqdjQPV

Corresponding Author
Septian Ulan Dini

Institutions
a) SMAS Sugar Group, Site PT. Gula Putih Mataram, Lampung Tengah
*septianulandini[at]gmail.com

Abstract
Tujuan penelitian ini adalah untuk menganalisis: (1) Kompetensi Dasar (KD) pada Permendikbud No. 24 tahun 2016 yang potensial untuk pembelajaran berbasis STEM (2) konten dalam website teachengineering.org dan tryengineering.org yang sesuai untuk pembelajaran fisika siswa kelas XI berbasis STEM berdasarkan kurkulum 2013. Subjek penelitian adalah website teachengineering.org dan tryengineering.org. Prosedur pemilihan subjek menggunakan teknik purposive sampling. Validasi data menggunakan triangulasi sumber. Analisis data dilakukan melalui tahap reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa (1) secara keseluruhan KD pada Permendikbud No. 24 tahun 2016 potensial untuk pembelajaran berbasis STEM (2) beberapa konten dalam website teachengineering.org dan tryengineering.org sesuai untuk pembelajaran fisika siswa kelas XI berbasis STEM berdasarkan kurkulum 2013.

Keywords
konten website, pendekatan STEM, pembelajaran fisika

Topic
Pembelajaran

Link: https://ifory.id/abstract/cJuDRxM2HzY3

Corresponding Author
Rokhy Markhiyano

Institutions
a. Magiter Teknik Sistem, Fakultas Teknik Universitas Gadjah Mada, rocky_ugm[at]yahoo.co.id
b. Departemen Teknik Kimia, Universitas Gadjah Mada, bayu[at]chemeng.ugm.ac.id
c. Departemen Teknik Mesin dan Industri, Universitas Gadjah Mada, alvaedytontowi[at]ugm.ac.id

Abstract
Indonesia memiliki perkembangan yang cukup signifikan pada dunia otomotif. Badan Statistik Nasional mencatat pertumbuhan kendaraan di Indonesia meningkat dengan pesat dari tahun ke tahun. Salah satu kelengkapan mobil antara lain adalah kaca mobil. Kaca mobil yang baik adalah kaca yang menyerap panas dan jelas pada saat berkendara. Salah satu layanan pasca-penjualan dari ATPM (Agen Tunggal Pemegang Merk) yang paling penting adalah layanan After Service, namun demikian tidak adanya layanan perbakan kaca yang tergores atau cacat, ATPM secara umum mengganti kaca mobil yang cacat atau tergores sehingga di nilai kurang ekonomis bagi konsumen.Pemanfaatan LTJ Cerium Oxide (CeO²) pada polishing kaca dengan teknik khusus mampu atau bertujuan mengatasi cacat kaca mobil.Teknik yang di uji adalah kemurnian Cerium Oxide,Grid Amplas Abrasive,Rpm,Waktu Pemrosesan dengan ukuran indek kebeningan hasil polishing.Hasil pengujian menunjukan Cerium Oxide pada kemurnian 98%, Grid amplas abrasive kombinasi 240 dan 400, Rpm 1600 mampu menghasilkan indek kebeningan kaca 99.9% pada kaca jenis laminated dan 97% pada kaca Tempered. Dengan demikian menunjukan rekomendasi untuk pengendaraan pasca perbaikan. Selanjutnya di lakukan analisa ekonomi dengan metode penyertaan investasi, pada analisa1) Payback Period (PP), 2) Net Present Value (NPV), 3) Profitability Indeks (PI), 4) Internal Rate of Return ( IRR), 5) Average Rate of Return (ARR), 6) Return of invesment (ROI ) menunjukan teknik pemolesan cacat kaca sebagai altenatif penggantian kaca baru layak untuk di kembangankan sebagai usaha jasa.

Keywords
Pertumbuhan mobil, kaca laminated tempered, Cerium Oxide ( CeO²), Polishing, ekonomi usaha

Topic
Material

Link: https://ifory.id/abstract/dqLtnZw6PTKz

Corresponding Author
Asep Rohiman

Institutions
Pusat Survei Geologi,
Badan Geologi, Kementerian Energi dan Sumber Daya Mineral,
Jl. Diponegoro no. 57 Bandung, Indonesia, 40122
Jl. Djunjunan No.236 Bandung, Indonesia, 40174

a) asep.rohiman[at]esdm.go.id (corresponding author)

Abstract
Komposisi unsur kimia dalam sampel batuan dapat dijadikan sebagai dasar untuk mengklasifikasikan jenis batuan, memprediksikan lingkungan pengendapan, umur batuan, dan lingkungan tektonik dimana batuan tersebut terbentuk. X-Ray Fluorescence merupakan salah satu instrumen yang digunakan untuk menganalisis sampel batuan. Kelebihan analisis menggunakan XRF yaitu proses analisis dapat dilakukan dengan lebih cepat, mudah, akurat, dan tidak merusak sampel. Namun, sebelum dilakukan pengukuran menggunakan instrumen X-Ray Fluorescence perlu didukung dengan proses preparasi sampel yang tepat.Pada penelitian ini telah dipelajari kondisi optimal dalam preparasi sampel standar batuan GBW 07105 dan JR-1. Adapun parameter yang dipelajari adalah variasi rasio komposisi binder Cellulose Mycro Crystalin dengan sampel standar, yaitu 1:4 dan 1:3. Teknik pencampuran sampel dilakukan dengan menggunakan penggerus mortar dan shaker. Optimalisasi preparasi sampel dilakukan dengan menggunakan teknik pressed powder pellet dan fused glass bead. Berdasarkan data hasil analisis diperoleh rasio binder terhadap sampel standar yang terbaik yaitu 1:3. Teknik preparasi pressed powder pellet merupakan teknik yang terbaik dalam menganalisis sampel menggunakan metode X-Ray Fluorescence. Studi lebih lanjut perlu juga dilakukan untuk melakukan analisis terhadap unsur-unsur minor dan jejak.

Keywords
unsur utama, pellet, glass bead, XRF, batuan, CMC, UTJ

Topic
Kebumian

Link: https://ifory.id/abstract/U8KQfbDJYyF2

Corresponding Author
Rasito Tursinah

Institutions
Laboratorium Fisika Nuklir, Jurusan Fisika, FMIPA, Institut Teknologi Bandung,
Jl. Ganeca 10, Bandung, Indonesia

Abstract
Telah dilakukan perhitungan keff dan waktu siklus operasi reaktor TRIGA 2000 untuk variasi tiga bahan bakar tipe UZrH. Terdapat tiga tipe bahan bakar TRIGA yaitu tipe pertama UZrH 8,5-20%, kedua UZrH 12-20%, dan ketiga UZrH-Er 20-20%. Perhitungan dilakukan dengan memodelkan 91 bahan bakar tipe UZrH yang ditempatkan di ring B-F dalam teras reaktor TRIGA. Metode Monte Carlo dengan program komputer MCNPX digunakan untuk menghitung fluks neutron di tiap bahan bakar dan keff teras. Perubahan komposisi bahan bakar hasil fisi dan aktivasi selama waktu operasi dihitung menggunakan program ORIGEN. Dengan MCNP-ORIGEN dihitung waktu siklus operasi reaktor berdasarkan nilai keff <1. Pengoperasian reaktor TRIGA menggunakan bahan bakar tipe pertama dihasilkan keff awal 1,062 dengan waktu siklus operasi 60 hari, tipe kedua dihasilkan keff awal 1,141 dan waktu operasi 450 hari, dan tipe ketiga dihasilkan keff awal 1,111 dan waktu operasi 870 hari.

Keywords
Nilai keff, Waktu operasi, Reaktor TRIGA, Tipe UZrH, MCNPX, Origen

Topic
Komputasi dan Pemodelan

Link: https://ifory.id/abstract/nYb7KVaX42ZG

Corresponding Author
Maya Rahma Zahara

Institutions
Institut Teknologi Bandung

Abstract
Telah dilakukan percobaan Pengembangan Perangkat Eksperimen Kinematika 1 Dimensi dan 2 Dimensi menggunakan Analisis Citra digital dan hasil perekaman dengan Fitur Long Exposure dan Arduino Uno. Percobaan Eksperimen Kinematika 1 Dimensi dilakukan dengan kecepatan motor yang bervariasi yaitu 70 rpm, 120 rpm, 150 rpm dan 200 rpm dengan teknik Falling ball pada bola jatuh bebas. Sedangkan percobaan Eksperimen Kinematika 2 Dimensi dilakukan dengan kecepatan motor yang bervariasi yaitu 100 rpm, 150 rpm, 175 rpm dan 200 rpm dengan bantuan Projectile Launcher pada gerak parabola. Pada percobaan ini didapatkan nilai Gravitasi pada gerak jatuh bebas dan nilai kecepatan sesaat sebelum bola menumbuk lantai pada gerak parabola

Keywords
Long Exposure, Arduino Uno, Kinematika

Topic
Pembelajaran

Link: https://ifory.id/abstract/LajuDt8TXvRe

Corresponding Author
Duwi Hariyanto

Institutions
(1) Program Studi Fisika
(2) Program Studi Sains dan Rekayasa Nuklir
Laboratorium Fisika Nuklir, Kelompok Keilmuan Fisika Nuklir dan Biofisika,
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132

(a) duwi_hariyanto[at]students.itb.ac.id (corresponding author)
(b) psidik[at]fi.itb.ac.id

Abstract
Informasi intensitas radiasi yang diterima seseorang di suatu lokasi selama waktu tertentu dapat diketahui dengan menggunakan surveymeter. Tujuan penelitian ini adalah untuk mempelajari intensitas radiasi di suatu lokasi menggunakan surveymeter berbasis tabung Geiger M4011 dan Mikrokontroler Arduino Uno. Modul tabung Geiger M4011 yang digunakan dapat mendeteksi radiasi gamma dan beta. Mikrokontroler Arduino Uno yang diintegrasikan dengan perangkat lunak open-source Parallax digunakan untuk akuisisi data hasil pengukuran intensitas radiasi. Pada penelitian ini, hasil pengukuran intensitas radiasi menggunakan skala kuantitas yaitu counts per minute (cpm). Lokasi pengukuran intensitas radiasi dalam penelitian ini meliputi kamar tidur, area sekitar batubara, dan area sekitar reaktor nuklir. Hasil penelitian ini menunjukkan bahwa intensitas radiasi di area sekitar batubara cenderung lebih rendah. Studi ini diharapkan menjadi salah satu referensi tentang pengukuran intensitas radiasi menggunakan surveymeter berbasis tabung Geiger M4011 dan Mikrokontroler Arduino Uno.

Keywords
Surveymeter, proteksi radiasi, tabung Geiger, mikrokontroler, counts per minutes

Topic
Instrumentasi

Link: https://ifory.id/abstract/kxyFgm2JeAcq

Corresponding Author
DICKY ZULFIKRIDIN

Institutions
a) Pusat Pengembangan Sumber Daya Kemetrologian – Kementerian Perdagangan
Jl. Daeng M. Ardiwinata km.3,4 Cihanjuang - Bandung
*email: dicky.zulfikridin[at]gmail.com

b) Kelompok Keilmuan Fisika Teoritik Energi Tinggi dan Instrumentasi
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132

Abstract
Telah dilakukan rancang bangun instrumentasi untuk memantau kualitas susu murni menggunakan metode pengukuran konduktivitas listrik. Pada penelitian ini, conductivity meter dirancang menggunakan metode empat probe pada pipa kapiler. Pengukuran konduktivitas listrik menggunakan sumber arus DC konstan yang dihubungkan pada dua buah elektroda dan elektroda lain sebagai pengukur tegangan listrik dari sampel susu murni melalui mikrokontroller Arduino ATMega 2560 yang telah terintegrasi dengan rangkaian ADC. Nilai cell constant hasil pengukuran adalah 2311,24 m-1. Kalibrasi cell constant pada empat buah probe menggunakan larutan standar KCl 0,1 M dan 0,01 M yang sudah diketahu nilai konduktivitas listriknya berdasarkan dokumen kalibrasi OIML R56 edisi tahun 1981 dan ASTM D1125-95. Hasil kalibrasi diperoleh nilai cell constant sebesar 3884,50 m-1 (KCl 0,1 M) dan 3358,70 m-1 (KCl 0,01 M). Data rekaman konduktivitas listrik melalui metode pipa kapiler menunjukkan rekaman kualitas pemantauan susu yang dapat dipercaya dan berlaku umum. Data rekaman konduktivitas listrik susu murni menurun dalam pemantauan selama 1 – 2 hari. Pada nilai dibawah 0,460 S/m diduga susu murni sudah mulai mengalami penurunan kualitas. Perubahan nilai konduktivitas listrik yang sangat cepat terjadi pada 3 jam awal pengukuran dan mencapai saturasi ketika pemantauan dilakukan lebih dari 24 jam. Kurva mulai terlihat mendatar pada waktu 16 jam setelah pemantauan. Parameter lain yang mendukung data rekaman konduktivitas listrik adalah pH dan temperatur. Hasil pemantauan menunjukkan bahwa pH berpengaruh terhadap penurunan kualitas susu dimana pH susu murni dalam kondisi awal diperoleh nilai pH 5,8 – 6,22 dan menurun sampai pH 3,5 - 3,7. Data konduktivitas listrik dikoreksi menggunakan faktor koreksi suhu pada 25 oC. Adanya nilai penurunan dan saturasi pada pemantauan data rekaman konduktivitas listrik dapat dikaitkan dengan adanya dugaan aktivitas bakteri yang mempengaruhi kandungan lemak, protein dan garam susu murni melalui proses tertentu. Diharapkan alat ini dapat dikembangkan lebih lanjut sebagai alat uji fisis dalam menentukan kualitas bahan pangan lain yang ada di pasaran.

Keywords
konduktivitas listrik, pipa kapiler, pemantauan, susu murni

Topic
Instrumentasi

Link: https://ifory.id/abstract/a3DewjTuVpEx

Corresponding Author
Sou Ryuzaki

Institutions
a, IMCE Kyushu University
b, JST PRESTO,
*ryuzaki[at]ms.ifoc.kyushu-u.ac.jp
c, ISIR Osaka University

Abstract
Rapid structural analysis methods for biomolecules and biomaterials consisting of single or several molecules in solution represent innovative technologies to reveal their functions because the functions strongly depend on their own structures. However, there presently exist no rapid structural analysis methods for single nanomaterials suspended in liquid environment. Nanopore sensors have been widely used to investigate the volume of particles and molecules passing through the pore by probing temporal changes in the ionic current pulses. These pulse sensors have been developed for not only size but also shape of analyte during recent years. Smaller aspect ratio defined as the ratio of the depth to the diameter and a high-speed current detection system provide greater spatial resolution, i.e. tomograms of a material passing through a nanopore. Here we will report the development of low-aspect-ratio nanopores with a spatial resolution of ca.35.5 nm and the 10 MHz-current-amplifier, resulting in realization of ultrafast time resolutions of 1.0 μs for the tomography analysis of a material passing through a nanopore. Combining state-of-the-art technologies with multiphysics simulation methods to translate ionic current data into tomograms of nanomaterials passing through a nanopore, we have achieved rapid structural analysis of single and dabble polystyrene (Pst) beads, and bionanomaterials such as E-colis in aqueous solutions [1]. In addition, we will also report plasmonic nanopore devices, which enable us to detect Surface-enhanced Raman Spectrum of a material inside a nanopore. The nanopore devices will be innovative technologies for the fields of nanobiodevices and structural biology. [1] S. Ryuzaki, et al., Nanotechnology 28 (2017) 15550

Keywords
nanopore

Topic
Biology

Link: https://ifory.id/abstract/2hVKXN8gWekC

Corresponding Author
Rizky Adhitama

Institutions
(a) Kelompok Keilmuan Fisika Nuklir dan Biofisika,
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132

Abstract
Salah satu perilaku yang menarik untuk dipelajari dari material granular adalah perpindahan panas dari suatu partikel dengan partikel lainnya yang tersusun secara unggun-kompak. Untuk mempelajari perilaku tersebut, dibutuhkan instrumen yang dapat memicu perpindahan panas dan merekam parameter yang terkait dengan perpindahan panas dalam suatu sistem yang terbentuk dari material granular. Parameter yang diukur untuk mempelajari perpindahan panas adalah temperatur. Temperatur akan diukur tiap detik, baik saat dipanaskan maupun saat didinginkan hingga suhu ambien setelah dipanaskan. Pengukuran temperatur dilakukan pada beberapa titik dari material granular dengan jarak yang berbeda-beda terhadap sumber panas. Data yang akan diperoleh berupa data perubahan temperatur dari titik-titik yang berbeda pada material granular selama perpindahan panas terjadi.

Keywords
Material granular; Perpindahan panas; Susunan unggun-kompak; Temperatur

Topic
Instrumentasi

Link: https://ifory.id/abstract/2UeMVkdtq4FH

Corresponding Author
Rindi Wulandari

Institutions
1) Laboratorium Fisika Nuklir,
Kelompok Keilmuan Fisika Nuklir dan Biofisika,
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132
*wulandarindi[at]gmail.com

2) Laboratorium Fisika Nuklir,
Kelompok Keilmuan Ilmu dan Rekayasa Nuklir
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132

Abstract
Pembangkit Listrik Tenaga Nuklir (PLTN) generasi IV adalah reaktor daya hasil pengembangan inovatif dari PLTN generasi sebelumnya yang dikembangkan oleh the Generation IV Forum (GIF) dengan kriteria aspek ekonomi yang tinggi, tingkat keselamatan lanjut, menghasilkan limbah dengan kuantitas yang sangat rendah, dan tahan terhadap aturan Non-Proliferation Treaty (NPT). Molten Salt Reactor (MSR) adalah salah satu reaktor nuklir generasi IV yang menggunakan molten salt sebagai bahan bakar dan pendingin, sehingga teknologi yang digunakan berbeda dengan reaktor berbahan bakar padat atau reaktor konvensional. Pada studi ini, penulis fokus pada fenomena perpindahan panas dari sistem sirkulasi alami pada MSR. Simulasi dibuat dengan model 2-dimensi menggunakan metode COMSOL Multiphysics. Aspek-aspek yang diperhitungkan dalam studi yaitu 1) fenomena heat transfer 2) perubahan laju alir 3) perubahan tekanan pada sistem. Skenario pada studi diasumsikan laju alir pada sistem primer dalam keadaan tunak dalam kondisi normal dan reaksi fisi diabaikan. Hasil dari studi ini adalah distirbusi temperatur pada core, tekanan pada sistem primer, dan kecepatan selama waktu tertentu.

Keywords
Molten Salt Reactor, Perpindahan panas, Metode COMSOL Multiphysics

Topic
Nuklir

Link: https://ifory.id/abstract/27YDUL3ZEJPc

Corresponding Author
Edyharto Yanuwar

Institutions
Laboratorium Fisika Teoretik,
Kelompok Keilmuan Fisika Teoretik Energi Tinggi dan Instrumentasi,
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung,
Jl. Ganesha no. 10 Bandung, Indonesia, 40132

Abstract
Sistem terkendala (constrained system) dapat dinyatakan dalam formalisme Hamiltonian. Diantara semua kendala yang mungkin, first class constraint memainkan peran sebagai generator simetri gauge. Struktur grup dari simetri gauge dalam formalisme Hamiltonian ini dibandingkan dengan simetri BRST. Simetri BRST sendiri adalah perluasan dari simetri gauge untuk mengatasi persoalan sistem terkendala. Ekivalensi keduanya terlihat dari generator simetri dan sifat-sifatnya. Sifat-sifat dari generator simetri yang ditinjau dan dibandingkan adalah hubungan komutasi antar generator yang kemudian membentuk grup dan simetri yang dihasilkan oleh generator dalam formalisme Hamiltonian. Ekivalensi kedua struktur grup tersebut ditinjau untuk kasus medan Yang-Mills.

Keywords
generator simetri, kendala/constraint, simetri BRST, simetri gauge, sistem terkendala

Topic
Teoretik

Link: https://ifory.id/abstract/kArcTpXzLQWd

Corresponding Author
Fahmi Ali Putra

Institutions
1) Program Sarjana Fisika,
Fakultas Sains dan Teknologi, Universitas Islam Negeri Sunan Gunung Djati Bandung
Jl. A. H. Nasution 105 Bandung, Indonesia, 40614
2) Laboratorium Fisika Nuklir dan Biofisika,
Kelompok Keilmuan Fisika Nuklir dan Biofisika,
Fakultas Matematika dan Ilmu Pengetahuan Alam, Institut Teknologi Bandung
Jl. Ganesha no. 10 Bandung, Indonesia, 40132
3) Laboratorium Sistem Modeling,
Kelompok Keilmuan Fisika Nuklir Teori,
Fakultas Sains dan Teknologi, Universitas Islam Negeri Sunan Gunung Djati Bandung
Jl. A. H. Nasution 105 Bandung, Indonesia, 40164

a) fahmialiputra[at]gmail.com

Abstract
Telah dibuat sebuah program untuk memodelkan fenomena fisis termodinamika tentang perubahan suhu benda akibat gesekan sebagai bahan pembelajaran yang mudah diakses melalui browser. Besaran-besaran fisis seperti kecepatan dan koefisien gesek dapat diatur oleh pengguna. Program dan perhitungan disusun menggunakan javascript. Adapun hasil akhir pemodelan ini adalah nilai suhu dan waktu yang ditunjukkan dalam bentuk grafik dan animasi.

Keywords
Pemodelan; Javascript; Termodinamika

Topic
Pembelajaran

Link: https://ifory.id/abstract/VBKCMWpcPkYv

Corresponding Author
Arip -

Institutions
Universitas Islam Negeri Sunan Gunung Djati Bandung
Institut Teknologi Bandung

Abstract
Koefisien restitusi merupakan suatu konstanta yang menyertai dua benda ketika mengalami tumbukan. Simulasi ini merupakan pengembangan dari praktikum koefisien restitusi beda jatuh, yang menggambarkan jalannya praktikum dalam bentuk visual dengan bantuan Javascript. Simulasi ini diharapkan dapat mengatasi kurangnya sumber daya terkait peralatan praktikum yang ada di sekolah-sekolah dan dapat menjadikan pendekatan alternatif dari pembelajaran koefisien restitusi. Metode simulasinya cukup sederhana sehingga mudah digunakan, cukup dengan hanya memasukan beberapa nilai parameter ketinggian 10, 20, 30, Berat Beda kg , dan kecepatan awal v0. Data yang didapat berupa tinggi benda h2, yangdapat diolah lebih lanjut untuk mendapatkan nilai koefisien restitusi.

Keywords
Simulasi, Javascript, Koefisien Restitusi

Topic
Komputasi dan Pemodelan

Link: https://ifory.id/abstract/RJubyNtACEkD

Corresponding Author
Pesta Indra Sigalingging

Institutions
a) Fisika, Institut Teknologi Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia
*pestaindra.sigalingging[at]gmail.com
b) Fisika, Institut Teknologi Bandung
Jalan Ganesha 10, Bandung 40132, Indonesia
wahyu[at]fi.itb.ac.id

Abstract
Inversi adalah proses untuk menentukan parameter model dari data. Dalam geofisika proses ini sangat penting karena gambar bawah permukaan diperoleh dari proses ini. Ada banyak algoritma inversi yang telah ada diperkenalkan dan diterapkan dalam masalah geofisika. Salah satunya adalah algoritma MOEA / D. Data Magnetotelluric (MT) digunakan untuk mendapatkan pencitraan resistivitas bawah permukaan. Resistivitas bawah permukaan diperoleh dengan inversi data MT. Secara umum, data MT mengandung dua bagian, yaitu: resistivitas semu dan fase atau bagian nyata dan imajiner. Pada umumnya, pengembangan pemodelan magnetotelurik dan algoritma inversi telah menunjukkan banyak keberhasilan. Meskipun pemodelan dan inversi tiga dimensi (3D) tersedia, pemodelan dan inversi 1D masih dilakukan, terutama untuk mendapatkan hasil awal sebelum melakukan pemodelan dimensi yang lebih tinggi. Inversi data MT untuk merekonstruksi nilai resistivitas dari setiap lapisan adalah untuk meminimalkan tujuan tunggal (kombinasi dua parameter data MT) yang menggunakan metode optimasi global atau lokalDalam penelitian ini, data Inversion MT untuk memperkirakan resistivitas 1D dari permukaan bawah menggunakan algoritma evolusi multi-objektif berdasarkan dekomposisi (MOEA / D) untuk meminimalkan kesalahan rata-rata kuadrat akar (RMSE) dari data yang dihitung dan diamati untuk resistivitas nyata dan data fase secara bersamaan. Multi-Objective Evolutionary Algorithm berdasarkan Dekomposisi (MOEA / D) adalah algoritma evolusioner yang menguraikan masalah optimisasi multi-tujuan menjadi beberapa sub-tujuan tunggal. Setiap sub-masalah memiliki solusi terbaik yang pernah ditemukan yang ditentukan dengan membandingkan semua solusi yang ditemukan oleh algoritma. MOEA / D diusulkan oleh Qingfu Zhang dan Hui Li, pada 2007. Algoritma telah diterapkan pada data sintetis dan lapangan. Hasil ini menunjukkan bahwa algoritma MOEA / D kuat dan akurat untuk menentukan resistivitas dan litologi bawah permukaan.

Keywords
Inversi, Magnetotellurik,MOEA/D

Topic
Kebumian

Link: https://ifory.id/abstract/RKP4rGBXyc9b

Corresponding Author
Hendra Susanto

Institutions
1 Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia
2 Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia
3 Department of Sports Science, Faculty of Sports Science, Universitas Negeri Malang, Malang, Indonesia
4 Department of Statistics, Faculty of Mathematics, Computation, and Data Science, Institut Teknologi Sepuluh November, Surabaya, Indonesia

Abstract
Metabolic syndrome and physical activity have a strong correlation to the gradual increased of degenerative diseases incidence in the global population. Currently, several approaches have been applied to prevent the progression of metabolic syndrome, including clinical drug therapy dan physical training program. However, limited data were found whether acute medium intensity exercise (AMIE) co-treated with middle rhythm musical exposure can affect to thermogenesis dan fatty acid oxidation. This study was designed by applying AMIE and music on 45 individual, non-professional athletes to evaluate the potential inducer of thermogenic activity (PGC-1α) profile in the muscle and adipose tissue. The preliminary finding of this study shows that AMIE exposure was significantly induced the increase of circulating PGC-1α as linear to the high-intensity exercise group, However, in contrary, the expression of this transcription factor tends to decreased post-AMIE-musical co-treatment. It is suggested that AMIE can induce thermogenesis in the skeletal muscle and adipose tissue by modulating oxidative phosphorylation within mitochondria. In summary, AMIE model may provide an alternative solution to combat metabolic syndrome linked obesity through enhancing the beta-oxidation process. Thus, the expanding investigation with a large sample and long-term monitoring program is required to establish this physical training program in the population.

Keywords
PGC-1alpha, acute medium intensity exercise, music, thermogenesis, metabolic syndrome

Topic
Biomedical Science

Link: https://ifory.id/abstract/TZMdyG7AHLJh

Corresponding Author
Hendra Susanto

Institutions
1 Department of Biology, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia
2 Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Malang, Indonesia
3 Department of Post Graduate Studies, Universitas Islam Sunan Ampel, Surabaya, Indonesia

Abstract
Moringa oleifera is an endemic plant in East Java Province that spread in several districts of this region. The fast-growing population of this plant, particularly in Madura Island and significant Island may provide an opportunity to explore the essential characteristics of this plant between each region. Moringa oleifera is not only the potential and miracle natural resources in Indonesia but also the crucial alternative solution combating malnutrition linked micro-macro elements deficiency. This study was conducted by using Moringa oleifera leaf powder (MOLP) from Madura island and other districts, including Malang, Pasuruan, Tuban, and Tulungagung. The basic profile of micro and macro elements were quantified by X-ray fluorescence spectroscopy (XRF) analysis at Central laboratory FMIPA Universitas Negeri Malang. Importantly, the higher level of Phosphor, Sulfur, and Potassium was found in MOLP Malang area while the lowest one was found in Madura sample. By contrast, a massive amount of Calcium, Manganese, Ferrum, and Molybdenum were dominantly found in Madura sample. Interestingly, the few concentration of Titanium was found in the Madura sample and cannot be observed in other samples. This data imply that Moringa oleifera leaf powder in East Java regions has a potential ingredient in the development of green materials synthesis and application, biomedical resources, and another implementation. To sum up, the exploration and application of MOLP from Madura variety for future clinical and nonclinical administration may become an alternative solution for combating metabolic disturbation related diseases. Thus, further expanding research is urgently required to establish the application of MOLP for medical and biomedical engineering linked advanced bionanotechnology.

Keywords
Moringa oleifera, leaf powder, biomaterials, East Java region

Topic
Biomaterial Science

Link: https://ifory.id/abstract/VfqZB4n6WAtT

Corresponding Author
Nur Aisyah

Institutions
Universitas Negeri Medan

Abstract
This study discusses about how lecturer intelligence can influence their perfomance. This research is a study that uses numerical numbers and changes feed approach to quantitative methods, with descriptive research. This research is conducted in Medan city. This study examines the performance of lecturers in private universities represented by universities that have lecturers of foundations with a long category of founding universities over 10 years namely: (1) Islamic University of North Sumatra (UISU); (2) Muhammadiyah University of North Sumatra (UMSU); (3) Muslim Nusantara University (UMN); (4) Nomensen University; (5) Indonesian Methodist University (UMI); (6) Catholic University of Santo Thomas. The result shows that Cognitive abilities tend to be high 53.33%. The average value of the overall cognitive abilities of lecturers in private universities in Medan is 81.92. Cognitive ability directly influences the performance of permanent lecturers in private universities in Medan.

Keywords
influence; intelligence; lecturer perfomance; private university, Medan; Indonesia

Topic
Economics, Business and Management Education

Link: https://ifory.id/abstract/JLBEVcMnGwrv

Corresponding Author
Suriyanti Siagian

Institutions
Social Anthropology, Medan State University

Abstract
Single mother in carrying out the function of education in family or Informal education can be seen how a woman is able to play a role in dividing her duties as a housewife and family head who plays a role in Informal education. The purpose of this study is to find out and get a picture of single mother as the head of the family in carrying out the functions of education in the family or in informal education in Kualuh Hulu Subdistrict, Labuhanbatu Utara District. In this study is descriptive qualitative by using the Ethnographic approach, Data Collection is done by means of in-depth interviews to participants of observation. Furthermore, the data analysis technique is done by observation, interviews, and documentation. The results of this study can be seen that single mother as the head of the family in carrying out the function of informal education in the family did not fail to educate their children to carry out the life process by prioritizing informal education in the family. As seen in the family single mother can divide time and carry out two functions as well as socialize it in the community because single mother is the head of the family in carrying out the function of informal education in the family. The conclusion in this study is that the role of single mothers as family heads in carrying out family functions is successful in educating children to be successful due to informal education in the family.

Keywords
single mother; parenting; informal education

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/wUyKBLgTfv8a

Corresponding Author
Dian Puspita Sari Sirait

Institutions
Social Anthropology
Medan State University

Abstract
Female prisoners in prisons are women who are perpetrators of crimes or crimes and how their life in prison is a social phenomenon that often occurs in the community, indicating that the "dignity and dignity" of women are much influenced by socio-economic abilities and human behavior. The lack of socio-economic conditions and thin potential of faith will be easy to carry out actions that deviate from religious norms, hence from the need to understand Character Education for female prisoners through Formal Socialization conducted by the Labuhanruku Penitentiary Institution. The purpose of this study is to find out and get an overview of the lives of female prisoners in the Labuhan Ruku Penitentiary. In this study it was descriptive qualitative using the Ethnographic approach. Data collection was done by in-depth interviews with observations. Furthermore, the data analysis technique is done by conducting interviews, and documentation. The results of this study can be seen that female prisoners in the Labuhan Ruku Penitentiary are motivated by the development and progress of the current era seems to be increasingly complex with various kinds of actions or criminal behavior, character education for female prisoners through formal socialization at Labuhanruku Penitentiary can change actions and the behavior of female prisoners is getting better and there are profound changes to the mental and psychological aspects of female prisoners in the institution.

Keywords
Character Education, Female Prisoners,

Topic
Social,Language and Cultural Education

Link: https://ifory.id/abstract/xHMXw7jeR89E