scholarly journals Determination of Scandium in mafic and ultramafic rocks of ophiolites from Luk Ulo Complex, Karangsambung, Central Java, Indonesia

2020 ◽  
Vol 200 ◽  
pp. 06003
Author(s):  
Nugroho Imam Setiawan ◽  
Kardo Polarman Rajoki Silitonga ◽  
Fahmi Adiyatma Makkaratte ◽  
Chusni Ansori
Keyword(s):  
Mineral Composition ◽  
General Trend ◽  
Elemental Abundance ◽  
Ultramafic Rocks ◽  
Mining Activities ◽  
Central Java ◽  
Parent Rocks ◽  
Modern Industry

Scandium (Sc) is important element for its utilization in modern industry. Initial Sc content in the parent rocks primary importance controlling the Sc concentrations in its weathered derivatives. This contribution examines the Sc concentrations in parent rocks of mafic and ultramafic rocks related to the ophiolite series in Luk Ulo Complex, Karangsambung, Central Java, Indonesia. The ophiolite series in this area are basalt, microgabbronorite, gabbronorite, websterite, and serpentinite from 5 locations of Medana, Lokidang, Parakansubah, Selogiri, and Pucangan areas. The general trend from the distribution of Sc in the ophiolite sequence of Medana and Parakansubah-Lokidang Rivers suggests the Sc contents increase from shallow to deeper levels of the sequence. The lowest concentrations of Sc in the ophiolite sequence of Medana and Parakansubah-Lokidang Rivers are in basalt, which are 24–29 ppm. In the middle sequence, the Sc concentrations are 27–34 ppm and 24–43 ppm, respectively in microgabbronorite and gabbronorite. The highest Sc concentrations are in websterite, which are 51–54 ppm, as the deepest sequence of the ophiolite in this area. Meanwhile, Sc contents in serpentinite from Selogiri and Pucangan areas are 5–11 ppm, which are considered the lowest Sc contents. It suggests that the pre-serpentinization mineral composition rather than the process of serpentinization determine the elemental abundance of Sc in serpentinite. The results are used to be an analog for Sc identification in the ophiolite belts in central Indonesia. This also considering that Luk Ulo Complex been established as National Geopark of Karangsambung-Karangbolong, so that mining activities are prohibited in this area.

scholarly journals DETERMINATION OF MINERALS CONTENT IN LEAVES OF MORINGA OLEIFERA BY NEUTRON ACTIVATION ANALYSIS

2018 ◽  
Vol 21 (1) ◽  
pp. 11 ◽  
Author(s):  
Theresia Rina Mulyaningsih ◽  
Saeful Yusuf
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Mineral Composition ◽  
Moringa Oleifera ◽  
Mineral Content ◽  
Essential Minerals ◽  
Central Java ◽  
Preliminary Study

DETERMINATION  OF  MINERALS  CONTENT  IN  LEAVES  OF  MORINGA  OLEIFERA  BY  NEUTRON ACTIVATION ANALYSIS. Moringa oleifera ( Mo) or kelor is a high-value plant,  distributed in many tropical and subtropical countries. This plant can be used as a vegetable,  cosmetic oil, and medicinal plant. The leaves of Mo is rich in essential minerals needed by the body’s health. Moringa oleifera widely cultivated in various places  in  Indonesia,  easily  obtained  and  inexpensive  so  precious  can  be  used  to  overcome  malnutrition. Research on the macro-micro mineral content in Moringa leaves here is still limited. Mineral composition in leaves include  Mo  leaves varies depending on location grow. The purpose of this research is to determine the mineral content in the  leaves of  the Mo  taken from Indonesia. For the preliminary study samples was taken from Central Java to be compared with the results of studies conducted in several other countries. Leaf samples were collected randomly from sampling area. Mineral content in the samples is determined using  Neutron  Activation  Analysis (NAA). Irradiation was carried out at rabbit system of Multipurpose Reactor G.A Siwabessy on neutron flux ~1013 n.cm-2.dt-1. The results obtained  indicate that Mo is rich in  essential minerals, mainly  Ca, Mg, K, Zn, Fe and Cl. Content in dried leaves include: calcium (3.45 % ), magnesium (0.66 %), potassium (3.35 %), chloride (0,25%), iron (147.20 mg/kg), sodium ( 152.52 mg/kg ), zinc (35.71 mg/kg), and manganese (102.10 mg/kg). Mo also contains other minerals such as chromium (4.76 mg/kg), bromine (4.82 mg/kg), cobalt (0.16 mg/kg), and aluminium (150.40 mg/kg) in addition to other element. Compared with the results of existing studies, it shows that mineral composition in Mo leaves varies depending on the location where the plant is grown.

scholarly journals Mineralogy and Geochemistry of Ultramafic Rocks from Rachoni Magnesite Mine, Gerakini (Chalkidiki, Northern Greece)

Minerals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 934
Author(s):  
Evangelos Tzamos ◽  
Micol Bussolesi ◽  
Giovanni Grieco ◽  
Pietro Marescotti ◽  
Laura Crispini ◽  
...  
Keyword(s):  
Raw Materials ◽  
Mining Area ◽  
Ultramafic Rocks ◽  
Northern Greece ◽  
Icp Ms ◽  
Time In Literature ◽  
History Of ◽  
First Time ◽  
The Eu

The importance of magnesite for the EU economy and industry is very high, making the understanding of their genesis for the exploration for new deposits a priority for the raw materials scientific community. In this direction, the study of the magnesite-hosting ultramafic rocks can be proved very useful. For the present study, ultramafic rock samples were collected from the magnesite ore-hosting ophiolite of the Gerakini mining area (Chalkidiki, Greece) to investigate the consecutive alteration events of the rocks which led to the metallogenesis of the significant magnesite ores of the area. All samples were subjected to a series of analytical methods for the determination of their mineralogical and geochemical characteristics: optical microscopy, XRD, SEM, EMPA, ICP–MS/OES and CIPW normalization. The results of these analyses revealed that the ultramafic rocks of the area have not only all been subjected to serpentinization, but these rocks have also undergone carbonation, silification and clay alteration. The latter events are attributed to the circulation of CO2-rich fluids responsible for the formation of the magnesite ores and locally, the further alteration of the serpentinites into listvenites. The current mineralogy of these rocks was found to be linked to one or more alteration event that took place, thus a significant contribution to the metallo- and petrogenetic history of the Gerakini ophiolite has been made. Furthermore, for the first time in literature, Fe inclusions in olivines from Greece were reported.

scholarly journals Staffing Application System In The Development And Supervision Of Employees Based On Information Technology (It) In Order To Good Government At Regional Office In The Ministry Of Justice And Human Rights Of Central Java (Case Study At Regional Office of the Ministry of Justice and Human Rights of Central Java)

2020 ◽  
Vol 2 (4) ◽  
pp. 469
Author(s):  
Widya Pratiwi Asmara ◽  
Sri Kusriyah Kusriyah ◽  
Widayati Widayati
Keyword(s):  
Information Technology ◽  
Human Rights ◽  
Performance Appraisal ◽  
Role Model ◽  
Civil Servants ◽  
Regional Office ◽  
Application System ◽  
Central Java ◽  
Good Government

Based on the study it can be concluded that the implementation of and development of application performance appraisal of civil servants is an assessment of the performance is done at the time of the achievement of targets Employee Work is done in a measured by comparing the actual work with the target set by the organization for each employee, so as to achievement of specified targets at the end of the year. Assessment of Civil Servants implementation work in the Regional Office of the Ministry of Justice and Human Rights of Central Java is done through evaluation methods.Barriers that occur in the Regional Office Law and Human Rights Ministry of Central Java in providing performance benefits as stipulated in the Regulation of the Minister of Law and Human Rights No. 22 of 2014 of which the form has not been found job analysis conducted by management office, employees are not willing / able to develop competency yourself , absence of a good methodology in identifying a job, the boss's behavior is supposed to give an example / role model in encouraging and competencies of subordinates, each employer is aware of the importance of creativity, initiative and a sense of each employee into good consideration in determining the types of work. Efforts are being made by increasing the strong desire of every employee in order to work in accordance with the assessments and improving the competence of oneself, in charging SKP by each employee be done routinely every day to get the direct supervision by the employer concerned, giving performance benefits granted optimally to each employee to the maximum, and the determination of the best boss by the Regional Office of the Ministry of Law and Human Rights, Central Java, so the boss can be an example, determine the class position, and provide the maximum performance benefits in accordance with the capabilities of each employee. Giving performance benefits given up to every employee to the maximum, and the determination of the boss of the best by the Regional Office of the Ministry of Law and Human Rights, Central Java, so the boss can be an example, determine the class position, and provide performance benefits to the maximum in accordance with the capabilities of each employee. Giving performance benefits given up to every employee to the maximum, and the determination of the boss of the best by the Regional Office of the Ministry of Law and Human Rights, Central Java, so the boss can be an example, determine the class position, and provide performance benefits to the maximum in accordance with the capabilities of each employee.Keywords: Staffing Application System; Information Technology (IT); Good Government.�

scholarly journals Evaluasi Program Pembinaan Senam Artistik Sekolah Dasar Di Kabupaten Pemalang

2020 ◽  
Vol 5 (2) ◽  
pp. 98-103
Author(s):  
Idah Tresnowati ◽  
Gilang Nuari Panggraita
Keyword(s):  
Elementary Schools ◽  
Descriptive Analysis ◽  
Development Program ◽  
First Grade ◽  
Input Process ◽  
Cipp Model ◽  
Central Java ◽  
Analysis Technique ◽  
Teacher Trainer

The determination of this research is to support the artistic gymnastics coaching program in Pemalang district of Central java. The approach used in the assessment of this program is the CIPP Model of Daniel Stufflebeam in terms of context, input, process, and product. There are three elementary schools that thrived in representing the name of Pemalang Regency to become champions in the artistic gymnastics competition in Central Java, the schools are from SDN Padek 01, SDN Pamutih 02 and MI Muhammadiyah. The collecting data used observation technique, interviews and documentation in the form of archives as supporting data. While the informant sources were the Principal, sport teacher/trainer, students as the gymnasts and parents of students. The analysis technique used is descriptive analysis. The results of the study show that: At the input stage, the athlete recruitment as a trainee was done voluntarily in accordance with the interests and talents sought since he/she entered first grade, for the determined criteria are applied well, inadequate facilities, insufficient and simple infrastructure. Keywords: Evaluation, Artistic Gymnastics Development Program, Elementary School AbstrakTujuan Penelitian ini untuk mengevaluasi program pembinaan senam artistik di kabupaten pemalang.  Metode penelitian yang digunakan yaitu deskriptif kualitatif. Pendekatan yang digunakan dalam penelitian evaluasi program ini  adalah CIPP Model (Daniel Stufflebeam’s) ditinjau dari tahap  context, input, proces, dan product. Ada tiga sekolah dasar  yang berhasil membawa nama kabupaten pemalang untuk menjadi juara dalam kompetisi senam artistik  tingkat Jawa Tengah, yaitu dari SDN Padek 01, SDN Pamutih 02 dan MI Muhammadiyah. Pengumpulan data menggunakan teknik  Pengamatan(observasi), wawancara (interview) dan dokumentasi berupa arsip sebagai data pendukung. Sedangkan informan yang digunakan adalah Kepala Sekolah, Guru Penjasorkes/pelatih, siswa sebagai pesenam serta orang tua siswa. penelitian menunjukan bahwa: Pada tahap input  perekrutan atlet sebagai peserta pelatihan secara suka rela sesuai dengan minat dan bakat dicari sejak dia masuk kelas satu,untuk kriteria yang ditetapkan dilaksanakan dengan baik,fasilitas yang kurang memadai,sarana prasarana kurang memadai dan sederhana. Kata kunci: Evaluasi, Program Pembinaan Senam Artistik, sekolah Dasar

scholarly journals The tectonostratigraphic architecture of the Serbo-Macedonian massif in the Vertiskos and Kerdilion mountains (Northern Greece)

2021 ◽  
Vol 57 (1) ◽  
pp. 1
Author(s):  
Anastasios Plougarlis ◽  
Markos Tranos ◽  
Lambrini Papadopoulou
Keyword(s):  
Cross Sections ◽  
Large Volume ◽  
General Trend ◽  
Shear Zones ◽  
Structural Features ◽  
Ultramafic Rocks ◽  
Northern Greece ◽  
Tectonic Contact ◽  
Western Side ◽  
Map Scale

The lithologies and structural features of the exposed rocks of the Serbo-Macedonian massif in the Vertiskos and Kerdilion Mts. have been studied in detail by carrying out km-long cross-sections. Moreover, a new tectonostratigraphic architecture for the massif is proposed, based on the migmatization and anatexis that the rocks pertain, under which the specific exposed rocks have been placed into the Vertiskos and Kerdilion Units. The latter approach differs from the traditional view, which is based solely on the lithological difference between the units. In particular, in the Vertiskos Mt., mica schists, garnet-bearing two-mica gneisses, and predominantly two-mica gneisses, without a sign of anatexis and migmatization, overlie tectonically, biotite gneisses and layered amphibolite gneisses into which migmatization and anatexis takes place. The former constitute the Vertiskos Unit, whereas the latter have been grouped into the Kerdilion Unit, since they are of similar lithologies and affinities with rocks of the Kerdilion Unit. The Kerdilion Mt. is a large antiform made up of biotite gneisses alternating with marbles, which are similarly characterized by intense migmatization and anatexis. These rocks are intruded by the Oreskia granite, which is foliated and follows the general trend of the country rocks. All the rocks are folded with isoclinal to tight folds, and the contact between the two units is a mylonitic shear zone with a top-to-the-SW sense-of-shear. Also, a large volume of ultramafic rocks occurs between the Vertiskos and Kerdilion Mts., including metamorphosed rocks like metagabbros to massive amphibolites, which is assigned to the Therma-Volvi-Gomati Complex (TVGC). These rocks have been found in tectonic contact, i.e., shear zones with top-to-the-SW sense-of-shear, only with the rocks of the Kerdilion Unit. Taking into account our new tectonostratigraphic architecture, the contact between the Vertiskos and Kerdilion Units is not located along the western side of the marbles, as the latter are exposed in the Kerdilion Mt. It is traced westerly in the Vertiskos Mt. dipping with intermediate angles towards the SW, due to NW-trending, map-scale, isoclinal folding. The ultramafic rocks of the TVGC are in tectonic contact with the rocks of the Kerdilion Unit, but not the two-mica gneisses of the Vertiskos Unit, and the Arnea granite intrudes not only the Vertiskos Unit as previously considered, but the rocks of the Kerdilion Unit, as well.

scholarly journals Spatial Analysis to Determine Groundwater Recharge Area in Purworejo Regency, Central Java Province/Indonesia

2018 ◽  
Vol 73 ◽  
pp. 03025 ◽  
Author(s):  
Thomas Triadi Putranto ◽  
Daniel Eko Aryanto
Keyword(s):  
Land Use ◽  
Spatial Analysis ◽  
Groundwater Recharge ◽  
Protected Area ◽  
Analysis Tool ◽  
Recharge Area ◽  
Rock Permeability ◽  
Central Java ◽  
The Impact

The impact of land use change will lead to a reduction of the land that is supposed to be for the groundwater recharge area. The area which is previously as a protected area, becoming a cultivated area. Determination of groundwater recharge areas is needed to ensure the availability of groundwater in Purworejo regency. The objective of this study is at determining the suitability of land use for groundwater recharge areas. The method was developed by using spatial analysis tool based on rating and weighting value of some parameters, i.e. rock permeability, rainfall, land use, soil type, slope, and depth of groundwater depth. Results conduct that the groundwater recharge area covers around 42,192 ha. Most of the groundwater recharge areas are located in the protected area, but there are several occupied by cultivated areas.

scholarly journals USULAN PENJADWALAN PRODUKSI PRODUK ST 37777 PT EBAKO NUSANTARA PADA DEPARTEMEN SMOOTHMILLING UNTUK MEMINIMASI MAKESPAN

2018 ◽  
Vol 13 (1) ◽  
pp. 61
Author(s):  
Mellysa Asmawar
Keyword(s):  
Production Process ◽  
Processing Time ◽  
Manufacturing Industry ◽  
Job Scheduling ◽  
Makespan Minimization ◽  
Central Java ◽  
Short Processing Time ◽  
Jobshop Scheduling ◽  
Machine Work

AbstrakProses produksi ST 37777 di PT Ebako Nusantara menggunakan jadwal yang didasarkan oleh proses-proses yang dilakukan dengan menggunakan data historis yang telah ada dari proses produksi yang telah dilakukan. PT Ebako Nusantara merupakan industri manufaktur yang bergerak di bidang furnitur yang berlokasi di Terboyo, Semarang, Jawa Tengah. Dalam proses produksi ST 37777, terdapat 11 mesin dan 16 job dimana setiap job memiliki urutan mesin yang berbeda. Penjadwalan yang ada untuk produk tipe ST 37777 dengan tipe jobshop belum menerapkan suatu ketetapan dalam penentuan waktu dan urutan pengerjaan mesin yang efektif sehingga masih banyak job yang selesai terlambat. Untuk itu diperlukan suatu penjadwalan mesin yang efektif sehingga dapat memenuhi waktu produksi pesanan sesuai dengan yang telah disepakati. Penjadwalan jobshop diperlukan untuk memaksimumkan efisiensi dan utilitas sumber daya di lantai produksi. Penentuan jadwal mesin ini bertujuan meminimasi makespan dengan menggunakan Software WINQSB modul job schedulling. Metode yang digunakan adalah metode Short Processing Time. Hasil penjadwalan menggunakan Software WINQSB diperoleh makespan menjadi 15 jam dengan hasil penjadwalan tersebut tidak ada job yang terlambat dan semua job dikerjakan berurutan. AbstractThe production process of ST 37777 in PT Ebako Nusantara uses a schedule based on the processes performed using existing historical data from the production process that has been done. PT Ebako Nusantara is a manufacturing industry engaged in furnitur located in Terboyo, Semarang, Central Java. In the production process ST 37777, there are 11 machines and 16 jobs where each job has a different sequence of machines. The existing scheduling for ST 37777 type product with jobshop type has not been applied a determination in the timing and sequence of effective machine work so that many jobs are finished too late. For that required an effective engine scheduling so that it can meet the production time of orders in accordance with the agreed. Jobshop scheduling is needed to maximize efficiency and resource utilities on the production floor. Determination of this machine schedule aims to minimize the makespan using WINQSB Software job scheduling module. The method used is the method of Short Processing Time. The scheduling result using WINQSB software obtained makespan to 15 hours with scheduling result no job is late and all job done in sequence. Keywords: Jobshop Scheduling; Short Processing Time; Makespan Minimization

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