bluuebunny/crossref_metadata_2025 huggingface dataset:
The Development of Fantasy Teaching Materials by Using VAK (Visual Auditory Kinesthetic) on 7th Grade Students in SMP Negeri 1 Medan
Authors: Rangkuti Nurul Jamiah , Ansarif Khairil , Hadi Wisman
Published: June 2020

This study aims to produce teaching materials by using VAK (Visual Auditory Kinestethic) on fantasy story material for 7th grade students of SMP Negeri 1 Medan. The research method used is Research and Development which refers to Borg and Gall model. The stages of development are the initial study phase, initial product development, and product trials. The results showed that the results of material validation included content eligibility with an average of 82% with a very good category, Eligibility for Presentation with an average of 87.5% with a very good category, and an assessment of language aspects with an average of 82.2% with a category very good. For the assessment of graphics by design experts obtained an average of 87% with the category "very good". Product trials are carried out in three stages: individual testing, small group trials, and limited field trials. Individual trials with an average of 86% with very good categories, small group trials with an average of 87.4% with very good categories, and limited field trials with an average of 88.3% with very good categories. The effectiveness of teaching materials is obtained through student learning outcomes in the pretest and posttest. Average score at pretest is 52 and at posttest is 76. This proves that the teaching material of fantasy story by using VAK (Visual Auditory Kinestethic) is feasible, easy, and effective for use in 7th grade students of SMP Negeri 1 Medan. This research has implications for Indonesian language learning process, which is teaching material by using VAK (Visual Auditory Kinestethic) which is developed to provide practical contributions, especially in the implementation of the learning process for teachers, teaching materials in the form of this module can be additional teaching materials to provide convenience in conveying fantasy story material taught, enriching and increasing students' knowledge about fantasy story so that learning will be more interesting and motivate students, trains students to learn independently.
Improvement of Student Learning Outcomes through Use Google Classroom Media in Class VIII-4 Students MTsN 1 Kota Subulussalam
Authors: Sihotang Candra , Saragih Abdul Hasan , K Abdul Hamid
Published: June 2020

The purpose of this study is to improve student learning outcomes in Indonesian language lessons using google classroom media. The subjects of the study were students of class VIII-4 MTsN 1 Subulussalam City, totaling 32 people consisting of 14 men and 18 women. This research uses a case study qualitative research method. Data collection techniques using observation, tests, and documentation. Then contextual data is analyzed through procedures namely: data reduction, data presentation, and drawing conclusions. The results showed an increase in student learning outcomes in learning Indonesian. This can be seen from the increase in the percentage of student learning outcomes from before the action, cycle I, to cycle II. Before the action the number of students who reached the KKM was 56.25% or 18 people. In the first cycle there was an increase to 71.88% or 23 people. Then in the second cycle there was an increase to 87.50% or 28 students. It can be concluded that the use of the google classroom application can improve learning outcomes in Indonesian subjects in class VIII-4 MTSN 1 Subulussalam City in 2019/2020.
The Development of Interactive Media Assisted by Macromedia Flash to Improve the Ability of Understanding the Fiction Story Information in Elementary School Students
Authors: Siregar Anggi Chairunnisa , Adisaputera Abdurahman , Yus Anita
Published: June 2020

This study aims to: (1) Analyze the effectiveness level of interactive learning media assisted by Macromedia Flash on story text learning that will be developed at Public Elementary School 060856 Medan Perjuangan Subdistrict. (2) Analyze how the level of interactive learning media assisted by Macromedia Flash in story text learning that will be developed at Public Elementary School 060856 Medan Perjuangan Subdistrict. This study uses Borg & Gall development research. Based on the analysis of learning media products assisted by Macromedia Flash from the experts, it was declared very effective and feasible to use with criteria of the validity of the material experts 85.42%, the design expert 91.00%, and the linguist 85.00%. Based on the completeness data of student learning outcomes before using interactive learning media assisted by Macromedia Flash obtained an average score of 62 while after using a large scale completeness reached an average of 90 with a gain score of 0.74 into the high category. And the student questionnaire responses to the effectiveness of interactive learning media assisted by Macromedia Flash reached 90% of 30 students. Based on this data interactive learning media assisted by Macromedia Flash are said to be effectively used in learning with the assumption that students' understanding of story text is higher when using interactive learning media assisted by Macromedia Flash.
Geokimia Endapan Nikel Laterit di Tambang Utara, Kecamatan Pomalaa, Kabupaten Kolaka, Provinsi Sulawesi Tengara
Authors: Indra Kusuma Riko Ardiansyah , Kamaruddin Hashari , Rosana Mega Fatimah , Tintin Yuningsih Euis
Published: June 2020

Pomalaa is administratively located in Kolaka Regency, Southeast Sulawesi Province. The nickel mining business area in Pomalaa is managed by State-Owned Enterprises and Private Enterprises. Pomalaa is a sub-district that has natural resources in the form of nickel. Nickel Laterite deposits is a result weathering of ultramafic rock that is leaching process and accumulates in the supergen enrichment zone. The lateritization factor is controlled by lithology, morphology, and structure. In general, the profile of laterite nickel deposits in the North Mine area from top to bottom consists of top soil, limonite, saprolite, and bedrock zones. The laterite nickel precipitate in the North Mine shows varying thickness, based on color, texture, size and mineral composition. Laterite deposits from drilling results reaches an range of 25 - 30 meters. Soil and rocks sampling from each laterite zone every meter resulting from drilling are carried out by laboratory testing using XRF (X-Ray Fluorescence) analysis method with 283 total sample. High Ni element show enrichment in the saprolite zone, whereas in the high Fe (iron) element in the limonite zone.Keywords: nickel, laterite, geochemical, Pomalaa
Karakteristik Fluida Hidrotermal Endapan Emas Orogenik di Pegunungan Rumbia, Kabupaten Bombana, Provinsi Sulawesi Tenggara
Authors: Hasria Hasria , Idrus Arifudin , Warmada I Wayan
Published: June 2020

Recently, gold exploration activities  are not only focused along volcanic-magmatic belt but also starting to shift along metamorphicand sedimentary terrains. The purpose of this study is to analyses the characteristics hydrothermal fluids gold deposits t in the Rumbia Mountains, Bombana Regency, Southeast Sulawesi. There are three generations of veins identified including the first is parallel to the foliations, the second crosscuts the first generation of veins/foliations, and the third is of laminated deformed quartz+calcite veins at the late stage. Temperature of homogenization (Th) and salinity at Rumbia Mountain of the first vein vary from 220 to 355.30oC and 6.74 to 10.11 wt. % NaCl eq., respectively. The second generation vein was originated at Th of 157 to 255.50oC and salinity of 3.39 to 6.88 wt.%NaCl eq., whereas the third generation vein formed at lowest Th varying from 104.40 to 265.90oC and less saline fluid at salinity range between 0.18 and 6.30 wt.% NaCl eq. The result of temperature formation value correlation to the depth of the formation of orogenic gold deposits in Rumbia Mountain is indicated to form on sub-greenschist to greenschist facies at depth of about 4-8 kilometers and formation temperature between 104.40 - 355.30oC at zone epizonal and mesozonal. Based on characteristics fluids inclusion discussed above, the primary metamorphic-hosted gold mineralization type at Rumbia Mountain tends to meet the criteria of orogenic gold type.  Keyword : fluid iclusion, quartz veins, Rumbia mountain, orogenic gold deposits.
Dryobalanoxylon sp. : Silicified Fossil Wood from Lebak Regency, Banten Province, Indonesia
Authors: Oktariani Hanny , Winantris Winantris , Hamzah Amir
Published: June 2020

Abstract- Two fossil wood were discovered from  Sindangsari Village, Sajira District, Lebak Regency, Banten Province, Indonesia. They were preserved within tuffaceous rocks of the Genteng Formation in Early Pliocene age in littoral to terrestrial environment deposition. To identify mineral composition of the silicified wood, XRD analyser method was applied. Result of XRD analyses shows that both of fossil wood are Dryobalanoxylon sp. consist of quartz mineral with d value is 3.358 Å and 3.350 Å Keywords : Dryobalanoxylon, Early Pliocene, Genteng Formation, Quartz
Characteristics of Grain Size Distribution on Beaches Sediment of Sumba Island, Nusa Tenggara Timur Based on Grainsize and Geochemical Data
Authors: Nugroho Septriono Hari , Putra Purna Sulastya
Published: June 2020

Study of beaches sediment characteristics were conducted on three beaches on Sumba Island, East Nusa Tenggara.The research is a part of Widya Nusantara Expedition which conducted by using Research Vessel of Baruna Jaya VIII. The aim of this study is to determine the characteristics of coastal deposits through the observation of grain size by using the grain size trend analysis approach (Grain Size Trend Analysis, commonly abbreviated as GSTA) and geochemical analysis. A total of 36 samples were taken on each coast representing high tide, transition and low tide along the coast. A grain size analysis was performed using a Malvern Mastersizer 2000 that was processed with Gradistat 4.0 software. Geochemical analysis was carried out using X-ray fluorescence spectrometry (XRF). The distribution of beach sediments is dominated by moderate sand - coarse sand and differences on content of geochemical elements (Ca, Sr, Fe, K, and Ti). The coastal conditions that are connected to the Indian Ocean (B1) have different characteristics from the beach that connected to the Sumba strait (B5 and B7). GSTA analysis showed sediment of Laboya Beach finer than sediment on Waikelo and Melolo Beach. Geochemical elements on Laboya Beach indicates different values than others. It indicates there are differences in the provenance and composition of sediment on the all three beaches. The supply of coastal deposits on these three beaches is influenced by the mechanism of precipitation of the walls and the processes of waves and rivers.Keywords: distribution, sediment, grainsize, geochemical, XRF, beach sediment.
Aplikasi Principle Component Analysis dan Directed Principal Component untuk Pemetaan Alterasi Hidrotermal menggunakan Citra ASTER di Kecamatan Kokap, Kulon Progo
Authors: Raharja Bayu , Setianto Agung , Titisari Anastasia Dewi
Published: June 2020

Endapan emas di daerah Kokap, Kabupaten Kulon Progo yang berasosiasi dengan endapan tipe epitermal terbentuk akibat adanya proses alterasi hidrotermal. Pemanfaatan data penginderaan jauh untuk pemetaan alterasi telah berhasil dilakukan diberbagai lokasi. Penelitian ini bertujuan untuk mengkaji kemampuan citra ASTER saluran visible near infrared (VNIR) dan saluran shortwave infrared (SWIR) dalam memetakan jenis alterasi menggunakan metode Principle Component Analysis (PCA) dan Directed Principal Component (DPC). Klasifikasi multispektral selanjutnya dilakukan untuk membedakan tipe alterasi hidrotermal menggunakan kombinasi saluran hasil PCA dan DPC. Keberhasilan pemetaan alterasi hidrotermal dievaluasi secara statistik menggunakan confusion matrix. Tingkat akurasi yang dapat diterima adalah sebesar 85% dengan koefisien kappa lebih besar dari 0.8. Hasil penelitian menunjukkan metode DPC memiliki akurasi lebih baik dari PCA dalam memetakan tipe alterasi meskipun tingkat akurasi keduanya dibawah batas yang ditentukan. Saluran ASTER yang paling baik digunakan untuk memetakan tipe alterasi hidrotermal di lokasi penelitian adalah 1, 2, 4, dan 6.
Palynostratigraphy, Paleoecology and Paleoclimatology of Early Pleistocene Based on Pollen Study of Pucangan Formation in Sangiran Area
Authors: Yulianto Eko , Sri Sukapti Woro , Setiawan Ruly
Published: June 2020

A pollen study has been conducted on samples taken from Pucangan Formation in Sangiran area. This study aims to reconstruct palynostratigraphy and to reveal environmental dynamics along with the deposition of Pucangan Formation with an emphasis on the influence of high frequency volcanism to the vegetational landscape in the montane area. The co-occurrence of Phyllocladus hypophyllus and Podocarpus imbricatus indicates Plistocene age of samples, and their stratigraphic position overlied by Middle Pleistocene Kabuh Formation leads to a conclusion of Early Pleistocene. All samples are included in Monoporites annulatus Peak Zone and subdivided into three Peak Subzone i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp. and Laevigatosporites sp. Concurrent Peak Subzone, Interval Subzone between two Peak Subzones i.e. Polypodisporites radiates, Psilotum nudum, Magnastriatites grandiosa, Cyathea sp., Laevigatosporites sp. Concurrent Peak Subzone and Casuarina sp. Peak Subzone. Along with the deposition of Pucangan Formation, savannah with sparse swamp, riparian and lowland forest spreaded out around particularly on lowland, while few mangrove forest grew on muddy sea-land interface environment and heterogenous montane forests occupied highland. During the deposition of stratigraphic profile, savannah got flourished on new emerged land due to regression. Frequent volcanic eruptions along with the deposition of the upper stratigraphic profile has destroyed heterogenous montane forest and led to the homogenous Casuarina junghuniana forest.Keywords: Palynology, Early Pleistocene, vegetational landscape, savannah, montane forest, regression, volcanism
Prediksi Model 2d Data Magnetotelurik Terbaik Berdasarkan Pendekatan Model Irisan Di Cekungan Tomori dan Sekitarnya
Authors: Junursyah Gusti Muhammad Lucki , Bagus Maulana Dimas , Rusdiana Randi
Published: June 2020

2D modeling of magnetotelluric data produce various models that are influenced by noise and differences in coordinate measurement systems with strike directions, so the results are inaccurate. A technique that can be done to identify the accuracy of the data is the rotation analysis based on the overlay model approach. The type of rotation used are strike angle and fix angle. The strike angle rotation is done by maximizing the anti-diagonal impedance value, while the rotation fix angle refers to the isotropic homogeneous earth model by eliminating the static effect on the surface. The overlay model approach is based on the assumption that the distribution of resistivity variations of the rock in the subsurface has same value in various models. 2D modeling used in this analysis consists of three trajectories of correlation results from 30 magnetotelluric measurement points in the Tomori and surrounding areas. The results of the analysis show that the strike angle rotation model is the best model that can be used in the study area with the approach of determination value reaches 0.7735, therefore it can reduce subsurface geological interpretation deviation based on various 2D models.Keywords: Magnetotelluric, impedance rotation, strike angle rotation, fix angle rotation
Studi Alterasi, Mineralisasi Dan Inklusi Fluida Prospek Hidrotermal (Pb-Zn-Cu±Au-Ag) Kubah Kulonprogo Bagian Selatan, Jawa Tengah
Authors: Fadlin Fadlin , Hajar Sulystiawan Isnu , Adi Prasetyo Luthfi
Published: June 2020

Ore potential especially base metals, gold and silver in the Kulonprogo Mountains have been a discussion of Indonesian geologists for a long time, until now its prospects as economic value has not been found, which made it a challenge to conduct an intensive and detailed study. This study is conducted to understand the mineralization-alteration characteristics and the deposit fluid of the study area. The method used in this study is a surface geological mapping, laboratory analysis such as mineragraphy, X-ray diffraction, ore geochemistry (Atomic Absorption Spectrometry-fire assay) and fluid inclusion. Alteration zone of the study area is divided into prophylitic, advanced argilic, argilic and silicification. Vein texture that develop in the study area is a massive quartz, stock work, and vuggy quartz which has NE-SW orientation, while the sulphide mineral abundance which found are enargite, pyrite, chalcopyrite, sphalerite, malachite, and molybdenite, occur in quartz veins or disseminated in gangue rock. Ore geochemistry AAS-fire assay of five vein samples show Au and the highest Ag content shown in sample 3 (Au:3.8. g/t, Ag:10 g/t). Fluid inclusion analysis results show homogenization temperature value (Th) which is 293,4-322,4o C, melting temperature (Tm) is -5,22o C until -6,3o C with average salinity value 10,58-12,89 wt,%NaCl equivalent. Hydrothermal fluid evolution of the study area is at the mixing with cooler phase and less saline fluids. Fluid is estimated from magmatic water that slowly mixed with meteoric water which is shown by the cooling temperature and salinity value. Based on alteration, mineralization, vein texture, ore geochemistry and fluid inclusion data results, therefore the deposit type at the study area is an intermediate epithermal sulphidation (IS).Keyword: alteration-mineralization, intermediate epithermal sulphidation, fluid inclusion, Kulonprogo Dome.
Protolith Oceanic Island Arc dari Granitoid Tipe M dan I di Karangsambung, Kebumen, Jawa Tengah
Authors: Ansori Chusni , Godang Shaban , Hastria Defry , Isyqi Isyqi
Published: June 2020

Granitoid rocks which found at Luk Ulo melange complex as rock fragments with  pale gray colour and faneritic texture. Petrogenesis and geotectonic of the granitoid is under debate. Some geologists consider as plagiogranite, which is formed from the Mid Ocean-ridge (MOR); or leucogranite which is formed from continental collision, and others argue as arc-related granitoid type.The field studies ware carried out on 5 (five) tracks around Luk Ulo River and 1 (one) track at Lokidang River. The pale grey Karangsambung granitoid is composed of the mainly  K-feldspar (34-55%), plagioclase (10-25%) and quartz (25-35%), and chemically contains SiO2 (61.25 - 66.06%); Al2O3 (13.94 – 14.61%), K2O (2.53 - 4.00%), Na2O (3.42 - 4.10%), CaO (2.32 - 4.76%), Fe2O3 total (5.85 – 8.71%), MgO (0.98 – 1.97%). The granitoid is M- and I-type that were formed at 760o - 800o C with a depth of about 20-30 km, resulting from the differentiation of magma from a fragment origin of the K-enriched oceanic island arc originating from drifting of the IAB fragment. The sample of basalt 17D has a relatively high of Nb/Ta ratio (20), low Rb (<2 ppm), low Ba (17 ppm), and is interpreted as interacting with MORB mantle magma containing rutile-melt;whereas quartz monzonite (17A) has a relatively low of Zr/Sm ratio (3.86), which is indicated to have been contaminated by a carbonatite magma. The spidergram pattern of mantle metagabbro (sample no. 13) similar with the basalt from IAB-Bransfield Strait (Antarctica). Results of a comprehensive geochemical study proposes that the current condition of the Karangsambung zone is part of geotectonic of ACM-Eurasia, that composed of a combination of four rock fragments, i.e. (a) the rocks which sourced from IAB fragments, (b) mantle MORB, (c) continental crust from the origin of ACM-Eurasia, (d) the origin fragment from carbonatite magma.Keyword: Luk Ulo Melange Complex, pale grey granitoid, Island-arc granitoid, M  and I-type granitoid
Trace and Rare Earth Elements Compositional Change on Andesite Alteration in Kaligesing, Purworejo
Authors: Subandrio Joko , Irzon Ronaldo
Published: June 2020

The change of chemical composition because of hydrothermal alteration process is related to the modification on mineralogy and elements mobility. Different alteration conditions could lead to dissimilar geochemical character. This study aims to discuss the alteration effect on trace and rare earth elements composition of an andesite outcrop with hydrothermal alteration in Kaligesing, Purworejo, Central Java Province. Microscopic analysis at Central for Geological Survey was applied to determine the modal mineral composition of the selected samples whilst trace and rare earth elements abundances was measured using Inductively Coupled Plasma – Mass Spectrometry. Plagioclase is the major phenocryst embedded in the fine-grained feldspar and glass groundmass of relatively fresh andesite. On the other hand, sericite, chlorite, epidote, and iron oxide are detected in the altered rock. The more Sr and Rb compositions on unaltered sample exhibit their common existence in plagioclase. The bigger Rb/Sr and the lower Ba/Sr ratios inward to the center of alteration might indicate the more degree of K-bearing mineral formation than Ca-rich mineral alteration. The Ba/Zr escalation and Zr/Y reduction from relatively fresh rock through to the vein of the studied samples are parallel to the previous investigation about andesite alteration. Chondrite-normalized rare-earth elements (REE) pattern of unaltered, altered, and vein samples depicts similar patterns: strong enrichment of Low REE, positive Eu anomaly, and relatively flat high REE. The decrease of Eu anomaly may reflect the reduction of plagioclase modal composition because of alteration and might indicate a reductive alteration state.Keywords: Alteration, andesite, geochemistry, trace and rare earth elements.
Investigasi Pendugaan Gerakan Tanah Menggunakan Metode Electrical Resistivity Tomography dan Self Potential di Daerah Pasanggrahan Baru, Sumedang Selatan
Authors: Santoso Budy , Subagio Subagio , Hasanah Mia Uswatun , Suwarga Hilman
Published: June 2020

Land movement occur because of the movement of slope-forming material such as of soil, rock or a combination of material types to a place that is lower due to the influence of gravity. The movement of slope material can be identified by the Electrical Resistivity Tomography (ERT) Method, because this method has good lateral and vertical resolution based on rock resistivity data. The trigger factors for land movement in Anjung Village, Pasanggrahan Baru, South Sumedang, among others: an increase in water content on the slopes and the slip plane. Increased water content is influenced by infiltration of rainwater as one of the triggers of land movement,  can be detected by the Self Potential method (SP), while the slip plane can be detected by the method of Electrical Resistivity Tomography (ERT). Based on the results of the ERT and SP measurements, the results are: debris flow as a landslide plane (resistivity values: 31 – 170 Ohm.m and SP values: 5 – 13 mV), water table/water saturated layer (resistivity values: 1 – 13 Ohm.m and SP values: 14 – 34 mV), and breccias (resistivity values: 400 - 900 Ohm.m and SP values: 1-3 mV).Slip plane are estimated to be at boundary between the breccia and the material on it.Keywords: Land movement, resistivity, self potential, South Sumedang
Umur Relatif Batuan Asal Sedimen Olisostrom Formasi Karangsambung, Kebumen, Jawa Tengah
Authors: Putra Purna Sulastya , Praptisih Praptisih
Published: June 2020

The Karangsambung Formation in Kebumen, Central Java is olisostrome deposit that composed of floating rock fragments in the claystone matrix. The age of this formation is still debatable, and it is even unclear that the present age was the age of the formation or the age of the source rock of the olisostrome sediment. In this study, the relative age of the source rock of the olisostrome sediment was identified by using foraminifera data. The relative age identification of the olisostrome source rocks are very important as the identification of olisostrome sediment age is very difficult. The relative age of Karangsambung Formation can be assumed younger than the age of the olisostrome source rocks. Result of Karangsambung Formation age identification with regard to the olisostrome concep will have implications to the regional tectonic model of Java.Keywords: Karangsambung Formation, relative age, source rock, foraminifera, olisostrome.
Geokimia Organik Serpih Hidrokarbon Berumur Eosen di Daerah Sumatera Bagian Tengah
Authors: Zajuli Moh. Heri Hermiyanto , Oktavitania Riecca , Rizkika Ollybinar
Published: June 2020

This study focused on the region of Central Sumatra that geologically into the Central and South Sumatra Basin. The subjects were from the Eocene shale in the areas such as the Kasiro, Sinamar, and Kelesa Formation. Shale of Central Sumatra Basin tend to have different characteristics with shale of South Sumatra Basin. Maceral content of vitrinite and liptinit on shale in South Sumatra Basin larger than Central Sumatra Basin shale. Oxic-anoxic conditions affecting to the abundance maceral-maceral in both basins. Shale of the  Kasiro Formation have a tend to indicate kerogen type I, and II, while shale of the Sinamar and Kelesa Formation included into kerogen type I, II and III. Shale from the three formation have the potential as an oil and gas with different characteristics. Shale of the Kasiro Formation shale has the potential source rock which can produce more oil than gas. Meanwhile shale of the Sinamar Formation  tend to be potentially as the source rock either oil or gas, oil shale and shale gas, but more potential as oil shale.  Key word : Liptinite, Vitrinite, Eocene, Central Sumatera Basin, South Sumatera Basin
Basement Configuration Of Labuan Basin, Pandeglang, Based On Gravity Data
Authors: Handayani Lina , Wardhana Dadan Dani
Published: June 2020

Pandeglang is located on the coast of the Sunda Strait, which is tectonically active as the source of geological hazards. Basement configuration mapping is required for further understanding in geological characteristic of the land. Gravity method is one of the geophysical techniques that can be applied for the regional subsurface characterization. Gravity measurements were completed in the Pandeglang area, from Tanjung Lesung to Labuan coastline and all passable roads in Pandeglang Regency. The Bouguer anomaly obtained has indicated a steady decreasing anomaly from south-southwest to north-northeast area. The result of residual anomalies analysis and basement depth estimation presented a deep basin in the northeast most of the study area (Labuan – Picung), which indicates a thick sediment layer in this area.Keywords: gravity anomaly, residual anomaly, basin, basement, Labuan, Pandeglang.
Optimization of Limestone Production Based on Geological Structure Conditions for Blasting Geometry Design
Authors: Assegaff Fachrur Reza , Endayana Cipta , Sulaksana Nana , Waloeyo Dwi Putranto
Published: June 2020

The research location is in Sumber Arum, a village in Kerek District, Tuban Regency, East Java. The object of this study includes the state of the geological structure around the mining site and its effect on blasting activities. The purpose of this study is to obtain a blasting geometry design that is suitable for the geological structure conditions at the mining site so that the resulting blasting fragmentation has a uniform size to increase the amount of company production. The method used in this study is to combine data from measurements and observations in the field with blasting design theory. From these data, further analysis and trial blasting activities are conducted and the results obtained from the actual blasting plan with the proposed blasting plan are compared. The calculation results of the blasting geometry design obtained the proposed blasting geometry values, including the burden of 2.5 meters, the spacing of 3 meters, the stemming of 1.75 meters, the subdrilling of 0.5 meters, the shot hole depth of 6.5 meters, and the direction of the explosion of 6.5 meters that is located at point N37ºE. Based on the application, the blasting fragmentation with a size of ≤ 80 cm is evenly distributed, with a percentage of 99.44% of the total fragmentation resulting from blasting. The amount of limestone produced in one year is 20.138.946 tons.Keywords: blasting geometry, production, limestone, geological structure
Sedimentologi Batugamping Formasi Jayapura di Sepanjang Lintasan Dewarebru, Mamei-Waibron, Jayapura
Authors: Maryanto Sigit , Hari Saputra Dian , Rinjani Sonia , Luthfi Faturrakhman M
Published: June 2020

The Pleistocene of the Jayapura Formation limestones well cropped out at Dewarebru Section, Mamey-Waybron, Jayapura Regency. Detailed descriptions of rock outcrops and petrography analysis of selected limestone samples is used to find out the limestone sedimentology characters. This Jayapura limestone was divided onto four limestone facies, including lithoclastic rudstone, bioclastic packstone, bioclastic grainstone and bioclastic wackesone rock facies. The rocks was deposited in a fore slope talus forming submarine alluvial fan, furthermore the rocks was deposited in a local slope on the back reef environment.Keywords: Limestone, petrography, stratigraphy, sedimentology, Jayapura
IMPLEMENTASI MODEL DIAMOND PORTER DALAM MEMBANGUN KEUNGGULAN BERSAING PADA KAWASAN AGROWISATA KEBUN BELIMBING NGRINGINREJO BOJONEGORO
Authors: Saraswati Ety , Hatneny Aleria Irma , Dewi Andi Normala
Published: June 2020

This study aims to examine the competitive advantage analysis through the Porter’s diamond model in Agrotourism Ngringinrejo Bojonegoro. The research method used is descriptive with qualitative approach. Data collection techniques are done by interview, observation and documentation. The results showed important determinant in the competitive advantage of Agrotourism Ngringinrejo Bojonegoro, in accordance with the diamond porter model, consist of factor conditions; demand conditions; firms structure, strategy and competition; related and supporting industries; and government roles. The difference of each determinant of competitive advantage has implications for sustainability advantages which based on four main dichotomies, consist of government involvement, ownership structure, market (which is entered by the industry), and expansion of other areas that are not controlled (urban sprawl). The generic strategy formulation that is suitable for Agrotourism Ngringinrejo is a focus strategy, by building capacity to carry out innovations and research beyond increasing agricultural productivity, as well as building artificial tourism facilities to support competitiveness.Keywords:  Tourism Competitive Advantage Models, Sustainable Competitive Advantage, Generic Strategies
PENGARUH KESADARAN MEREK DAN PERSEPSI KUALITAS TERHADAP KEPUTUSAN MEMBELI SECARA ONLINE MELALUI KEPERCAYAAN MEREK PADA E-COMMERCE SHOPEE DI KOTA BANJARMASIN
Authors: Rusmanida Rusmanida
Published: June 2020

Tujuan penelitian ini adalah untuk mengetahui pengaruh kesadaran merek dan persepsi kualitas terhadap keputusan membeli secara online melalui kepercayaan merek pada e-commerce shopee di Kota Banjarmasin. Jenis penelitian yang digunakan dalam penelitian ini yaitu Penelitian Korelasional (hubungan) untuk menemukan apakah terdapat hubungan antara dua variabel atau lebih, serta seberapa besar korelasi dan yang ada diantara variabel yang diteliti dengan pengambilan sampel sebanyak 57 responden.Hasil penelitian ini menunjukkan bahwa pengaruh total  antara variabel kesadaran merek  terhadap keputusan membeli positif dapat diartikan bahwa semakin tinggi kepercayaan merek  maka keputusan membeli akan semakin meningkat. Begitu juga dengan pengaruh total  antara variabel persepsi kualitas terhadap keputusan membeli positif dapat diartikan bahwa semakin tinggi persepsi kualitas  maka keputusan membeli akan semakin meningkat.Kata Kunci: Kesadaran Merek, Persepsi Kualitas, Kepercayaan Merek, Keputusan Membeli The purpose of this study was to determine the effect of brand awareness and percevied on online buying decisions through brand trust in e-commerce shopee in Banjarmasin City. The type of research used in this study is Correlational Research (relationship) to find out whether there is a relationship between two or more variables, and how much correlation and existing variables are examined with a sample of 57 respondents.The results of this study indicate that the total influence between the brand awareness variable on the buying decision a positive can be interpreted that the higher brand trust then the buying decision will increase. Likewise, the total influence between the variables of quality perception of positive buying decisions can be interpreted that the higher the percevied quality then the decision to buy will increase.Keywords: Brand Awareness, Perceived Quality, Brand Trust, Buying Decision
ANALISIS PROSES BERPIKIR KRITIS MAHASISWA DALAM MATA KULIAH PERSAMAAN DIFERENSIAL DAN SCAFFOLDING-NYA
Authors: Alifiani Alifiani , Hasana Siti Nurul
Published: June 2020

Penelitian ini bertujuan untuk mendeskripsikan proses berpikir kritis mahasiswa dalam menentukan solusi dari persamaan diferensial. Penelitian ini menggunakan pendekatan kualitatif dengan jenis deskriptif-eksploratif. Subjek penelitian terdiri dari 3 mahasiswa Pendidikan Matematika Universitas Islam Malang. Instrumen utama dalam penelitian ini adalah peneliti sendiri. Selain itu juga digunakan soal tes sebagai instrument penelitian.  Soal tes disesuaikan dengan indikator kemampuan berpikir kritis IDEAS (Identify, Define, Enumerate, Analyze, Scrutinize). Soal tes terdiri dari 3 soal yang diberikan secara bertahap. Hasil soal tes selanjutnya dianalisis dan dilakukan wawancara kepada subjek penelitian untuk mengetahui proses berpikir kritis mahasiswa saat mengerjakan soal tes. Pada soal tes pertama, subjek penelitian belum mampu berpikir kritis dengan baik karena tidak dapat memenuhi indikator IDEAS. Oleh karena itu, mahasiswa diberikan scaffolding guna mengembangkan kemampuan berpikir kritis yang diberikan. Scaffolding diberikan dalam bentuk social scaffolding berupa penerapan model pembelajaran DD/CT (Deep Dialogue/ Critical Thinking) dalam perkuliahan persamaan diferensial. Pada soal tes kedua, kemampuan berpikir kritis mahasiswa mulai berkembang namun tetap belum memenuhi indikator IDEAS sehingga diberikan social scaffolding kembali berupa penerapan model pembelajaran DD/CT dipadukan dengan  model pembelajaran kooperatif tipe TS-TS (Two Stay-Two Stray). AbstractThis study aims to describe students' critical thinking processes in determining solutions to differential equations. This study uses a descriptive and explorative in a qualitative approach. The research subjects consisted of 3 Mathematics Education students at the University of Islam Malang. The main instrument in this study is the researchers themselves. In addition, test questions are also used as research instruments. Test questions are adapted to IDEAS (Identify, Define, Enumerate, Analyze, Scrutinize) critical thinking skills indicators. The test questions consist of 3 questions given in stages. The results of the test questions were then analyzed and interviewed to the subject of the study to find out the critical thinking process of students when working on test questions. In the first test question, the research subjects were not able to think critically well because they could not meet the IDEAS indicator. Therefore, students are given a scaffolding to develop the critical thinking skills provided. Scaffolding is given in the form of social scaffolding that is the application of the DD / CT (Deep Dialogue / Critical Thinking) learning model in lectures on differential equations. In the second test question, students' critical thinking skills began to develop but still did not meet the IDEAS indicator so that social scaffolding was again given in the form of the application of the DD / CT learning model combined with the TS-TS cooperative learning model (Two Stay-Two Stray).
KECEMASAN STATISTIK PADA MAHASISWA CALON GURU
Authors: Faradiba Surya Sari , Walida Sikky El
Published: June 2020

Peranan Statistika sebagai salah satu bidang ilmu yang berfungsi untuk merencanakan, mengumpulkan, menganalisis, menginterpretasi, dan merepresentasikan data sebagai dasar untuk pengambilan keputusan sangat penting bagi perkembangan ilmu pengetahuan dan teknologi. Oleh karena itu, tidak mengherankan jika Statistika banyak digunakan dalam berbagai disiplin ilmu lain, antara lain ilmu alam, ilmu sosial, maupun ilmu humaniora. Mengingat tidak semua pengguna statistika memiliki latar belakang pendidikan Matematika, maka penggunaan alat bantu program SPSS menjadi alternatif yang patut dipertimbangkan. Sayangnya, dalam aplikasinya, pengguna SPSS lebih banyak sekedar mengikuti langkah-langkah prosedural tanpa memahami mengapa mereka melakukan hal tersebut. Dampaknya, pengguna SPSS banyak yang merasa kesulitan dalam melakukan analisis data statistik dan semakin tidak menyukai statistika. Penelitian ini bertujuan untuk mengetahui kondisi kecemasan statistik pada mahasiswa yang menggunakan SPSS. Hasil penelitian ini menunjukkan mayoritas mahasiswa dalam penelitian ini (n = 105, 73,4%) tidak menunjukkan kecemasan terhadap statistik melalui empat domain utama yang diukur. Tiga puluh satu siswa (21,7%) menunjukkan kecemasan dalam satu domain, empat siswa (2,8%) menunjukkan kecemasan dalam dua domain dan tiga siswa (2,1%) menunjukkan kecemasan dalam tiga domain. Tidak ada siswa dalam penelitian ini yang menunjukkan kecemasan pada keempat domain sekaligus yang diukur. The role of Statistics as one of the fields of science that functions to plan, collect, analyze, interpret, and represent data as a basis for decision making is very important for the development of science and technology. Therefore, it is not surprising that Statistics is widely used in various other disciplines, including natural sciences, social sciences, and humanities. Given that not all statistical users have a Mathematics education background, the use of SPSS program tools is an alternative that should be considered. Unfortunately, in the application, SPSS users are more just following procedural steps without understanding why they are doing it. The impact is that many SPSS users find it difficult to analyze statistical data and increasingly dislike statistics. This study aims to determine statistical anxiety conditions in students using SPSS. The results of this study indicate that the majority of students in this study (n = 105, 73.4%) did not show statistics anxiety through the four main domains measured. Thirty-one students (21.7%) showed anxiety in one domain, four students (2.8%) showed anxiety in two domains and three students (2.1%) showed anxiety in three domains. There were no students in this study who showed anxiety in all four domains as well as being measured.
PENGARUH CITRA MEREK, KEPERCAYAAN, DAN KOMITMEN TERHADAP LOYALITAS PELANGGAN APLIKASI TRANSPORTASI ONLINE GOJEK DI KOTA MALANG
Authors: Ramadhan M. Afif Fathi
Published: June 2020

This study aims to determine the effect of brand image on trust, brand image on loyalty, brand image on commitment, trust and commitment to loyalty, and indirect influence of brand image on loyalty mediated trust, and indirect influence of brand image on loyalty mediated commitment. The population in this study is unknown. Sampling in this study using incidental sampling and purposive sampling techniques as many as 96 respondents. The analysis is done using path analysis. The results of this study indicate that brand image has a positive and significant effect on trust, brand image has a positive and significant effect on loyalty, brand image has a positive and significant effect on commitment, trust and commitment has a positive and significant effect on loyalty, there is an indirect effect of brand image on loyalty through trust, there is an indirect influence of brand image on loyalty through commitment.Keywords: Brand Image, Trust, Commitment, Loyalty.
THE EFFECT OF BRANDING, PRODUCT QUALITY, AND REFERENCE GROUP ON PURCHASING DECISIONS THROUGH PROMOTION AS INTERVENTION VARIABLES (CASE STUDY OF SAMSUNG CUSTOMER AT METEOR CELL STORE MALANG)
Authors: Sudirman Sudirman
Published: June 2020

AbstractBranding, product quality, reference group, and promotion is one that influences purchasing decisions. Buyers who have a high brand image will lead to purchasing decisions.This research was conducted at the  Meteor Cell Store Malang. The purpose of this study was to examine and analyze the effect of branding on promotion, product quality on promotion, reference group on promotion, branding on purchasing decisions, product quality on purchasing decisions, reference groups on purchasing and promotion decisions on purchasing decisions.The variables used in this study are branding, product quality, and reference group as endogenous variables. Exogenous variables are purchasing decisions and the intervening variable is a purchasing decision. The samples used in this study were Meteor Cell Store Malang's customers who bought Samsung Brand Smartphones, as many as 95 respondents. The data collection method used is a questionnaire. The analysis used includes the instrument test, classic assumption test, normality test and hypothesis test using path analysis with the help of SPSS 21.0 For Windows.The results of this study indicate that branding and product quality have a significant and positive direct effect on promotion, while the benchmark group variable does not directly influence promotion. The brand image variable and product quality have a significant and positive effect on purchasing decisions, while the reference group variable has no effect on purchasing decisions. This shows that the reference group is no longer needed by consumers of the Meteor Cell Store Malang, they prefer to find information about Samsung smartphones via the internet and other information when viewed from the respondents' educational background for they are on average are graduate students. Keywords: Branding, Product Quality, Reference Group, and Purchasing Decision.
Diferensiasi Pengungsi dan Pencari Suaka dalam Hukum Pengungsi Internasional dan Hubungannya dengan Prinsip Non-Refoulement
Authors: Fitriyadi Ahmad Adi , Latukau Fikry
Published: June 2020

Tujuan dari tulisan ini untuk membedakan kedua istilah tersebut (pengungsi dan pencari suaka) dan hubungannya dengan prinsip non-refoulement. Hukum pengungsi internasional pada dasarnya merupakan hukum yang sangat bertalian dengan hak asasi manusia, khususnya hak asasi manusia internasional. Hukum pengungsi internasional dikatakan pula sebagai lex specialis dari hukum hak asasi manusia internasional dan menariknya adalah bahwa pembahasan terkait pengungsi merupakan bahasan yang relatif sangat baru, khususnya di Indonesia. Metode penelitian yang digunakan adalah pendekatan yuridis normatif. Hasil penelitian menunjukan istilah pengungsi seringkali dibingungkan jika dihadapkan dengan istilah pencari suaka. Hal ini didasarkan bahwa kedua istilah tersebut merujuk pada pelarian seseorang ke negara lain karena didasarkan pada kelompok sosial tertentu, opini politik, atau pelarian politik. Sedangkan Pencari Suaka erat kaitannya dengan domain hukum diplomatik dan konsuler. Meskipun demikian, kedua istilah tersebut sama-sama menerapkan prinsip hukum hak asasi manusia internasional, yakni prinsip non-refoulement.
Evaluación del rendimiento seco de la Brachiaria humidicola asociada con plantas leguminosas nativas en Llanos de Coclé, Panamá
Authors: Tomita Kentaro , Arosemena Jaén Esteban
Published: June 2020

Se trata de un estudio en gran parte de los suelos del Arco Seco de la República de Panamá en donde han sido identificados como suelos degradados, con baja fertilidad (ANAM, 2004) por la deforestación a través del largo plazo. La finalidad fue establecer un sistema sostenible de la producción del pasto con bajos insumos en la tierra usada. Para ello se realizó el experimento después de corte de la Brachiaria humidicola viva, se preparó como un bloque experimental fue de 3m por 5m y totalmente, 6 tratamientos (comparación de manera de la fertilización periódica para recuperar el mismo pasto) al azar con 4 repeticiones (24 bloques) en la finca experimental de El Coco, Coclé. La duración del experimento se empezó del día 13 de agosto al día 2 de octubre del 2007, y la duración del cultivo de la Brachiaria humidicola fue de los 50 días, al alcanzar 5cm de la altura, se realizó el corte.
Parámetros bioquímicos sanguíneos en llamas (Lama glama) alimentadas en praderas nativas tholar pajonal en Choquecota Oruro, Bolivia
Authors: Copa Santiago , Condori Rene
Published: June 2020

Con el objetivo de determinar los parámetros bioquímicos sanguíneos en llamas alimentadas en praderas naturales tholar pajonal, se tomó muestras de sangre por punción yugular de 62 llamas distribuidas por categorías de edad, que fueron procesadas en analizador de química sanguínea VetScanVS2 utilizando el Regent Rotor ABAXIS, los datos se analizaron con un diseño completamente al azar y las diferencias estadísticas por la prueba de comparación de medias de Duncan. Los resultados fueron: proteína total (PT) 6,60+0,51 g/dL, albúmina (ALB) 4,29+0,36 g/dL, globulina (GLOB) 2,29+0,55 g/dL, urea nitrógeno (BUN) 6,89+4,60 mg/dL, fosfatasa alcalina (ALP) 87,39+47,78 UI/L, alanina aminotransferasa (ALT) 10,42+3,60 UI/L, amilasa (AMY) 671,61+124,06 UI/L, creatinina (CRE) 2,52+0,49 mg/dL, bilirrubina total (TBIL) 0,30 mg/dL, glucosa (GLU) 105,65+17,83 mg/dL, calcio (CA) 9,30+0,33 mg/dL, fósforo (PHOS) 9,09+1,19 mg/dL, sodio (NA) 147,08+3,04 mEq/L y potasio (K) 5,99+0,80 mEq/L. La edad de llamas influye sobre los parámetros sanguíneos (P?0,01) de PT (proteína total), ALB, GLOB, BUN, ALP, AMY, CRE, GLU, CA, PHOS; mientras la ALT,TBILL,NA y K no están influidos por la edad (P>0,05). En llamas cada individuo posee patrones diferentes de componentes químicos sanguíneos que pueden cambiar con la edad.
Evaluación de las características físicas, químicas y sensoriales de la harina de maíz precocidad con salvado de arroz en la elaboración de arepas
Authors: Gómez Meivi , Ramírez Leonardo
Published: June 2020

El presente artículo muestra la evaluación acerca de las características físicas: expansión, granulometría, así mismo, químicas: humedad y atributos sensoriales: color, sabor y textura de la harina de maíz precocida con salvado de arroz en la elaboración de arepas. Como método fueron elaboradas tres formulaciones de harina de maíz precocida con salvado de arroz de arroz (50:50, 70:30 y 80:20). El análisis de las características físicas demostró que la calidad de las arepas depende significativamente de la expansión y granulometría, ya que se observó que a mayor porcentaje de harina de maíz precocida aumentaba la capacidad de retención de agua, cabe destacar que el salvado de arroz le aporta altos valores nutricionales. Los resultados del análisis sensorial indicaron que entre las tres formulaciones los consumidores se inclinaron por la muestra 493 de harina de maíz precocida con salvado de arroz (80:20) de menor granulometría por lo que se consideró esta mezcla de harina compuesta como la muestra óptima.