bluuebunny/crossref_metadata_2025_split huggingface dataset:
Geología y deformación frágil de los cerros la sotolera y la crucita, al oriente de Pachuca
Authors: Escamilla Casas J. C. , Meneses-Meneses E. , Uribe Alcántara E. M. , Ortíz Hernández E. , Montiel Palma S. , Ortega Reyes A. O. 
Published: May 2022

La determinación de la sucesión cronológica relativa de las etapas de deformación frágil en la Sierra de Pachuca, es un elemento fundamental para entender los procesos de la captación pluvial en la región y la mineralización en el distrito minero Pachuca-Real del Monte. A partir de la cartografía a semidetalle en los cerros La Sotolera y La Crucita, al oriente de Pachuca, se han identificado 4 etapas de deformación frágil que afectan a rocas de composición predominantemente félsica del Plioceno-Cuaternario. Siguiendo el orden cronológico relativo, la primera etapa de deformación frágil (F1) se caracteriza por fallas normales NW-SE, con el bloque del techo hacia el NE y se asocia con el emplazamiento de diques félsicos. La segunda etapa (F2) está constituida por fallas normales predominantemente E-W y con el bloque del techo hacia el S. La tercera etapa (F3) la constituyen fallas de trans-tensión con desplazamiento lateral derecho y componente normal con el bloque del techo hacia el S, ocurriendo a lo largo de planos subparalelos a F1. La etapa F4 es la más reciente ya que afecta a depósitos epiclásticos y se caracteriza por fallas inversas NW-SE con el bloque del techo hacia el SW. Por lo anterior, se sustenta la hipótesis de que la deformación frágil en la región constituye un continuo pulsante y que, muy probablemente, tenga actividad en el presente.
Micro-diamantes originados por impacto de meteoritos
Authors: Mendez Escamilla Y. , Gallegos Ortega G. , Cobos-Murcia J.A. 
Published: May 2022

Los micro-diamantes formados por un meteorito o también llamados diamantes de impacto, son diamantes creados a partir del metamorfismo generado por el choque entre un cuerpo cósmico y la corteza (zona de impacto). Para que este fenómeno ocurra, deben darse ciertas condiciones termodinámicas. Hasta el momento, solo se conoce la formación de microdiamantes y se desconocen las condiciones energéticas emitidas por el choque de masas (meteorito y suelo) para asemejarse a uno de los procesos geológicos más importantes para la formación de diamantes terrestres, así como la forma en que se expresa espontáneamente dicho fenómeno. Por ello, en el presente trabajo se estudiaron simuladamente los cambios termodinámicos (entalpía, entropía y capacidad calorífica) a los que es sometido el carbono de la corteza terrestre para la formación de diamantes terrestres, pero bajo las condiciones de impacto de meteoritos. Para ello se utilizaron los softwares HSC Chemistry (versión 5.1) y wolframalpha manipulando las variables fase del carbono y temperatura, esta última de acuerdo a los valores registrados para la formación de micro-diamantes por impacto y diamantes terrestres, así mismo se estudiaron los resultados de acuerdo a la fase del carbono. Los resultados del trabajo indicaron que el fenómeno es exógeno y/o endógeno dependiendo de la fase del carbono capturado en el software y su grado de dispersión de energía. Ya que a mayor dispersión de energía la formación de diamantes no se ve favorecida.
Remaja dan Karaoke Malam Kota Lhokseumawe
Authors: Kasim Fajri M. , Lisa Ema , Yani Ahmad 
Published: May 2022

This study examines teenagers and karaoke nights. The purpose of this study was to determine the cause of teenagers going to karaoke nights and the impact of frequent karaoke nights. We used qualitative analysis. The study shows that there are various reasons why teenagers come to karaoke nights. Some of them come from broken home families so the teenager looks for another place outside the home for disappointment. Some teenagers go to karaoke places to look for additional income. They can work as waiters or become singers who are booked by officials or businessmen who have a lot of money. There are even teenagers who become called women to serve them. Another reason why teenagers go to karaoke is the lack of parental supervision. The impact of teenagers frequenting karaoke nights is the unhealthy association that tends to lead to promiscuity which is very detrimental to themselves and their parents. Promiscuity becomes accustomed to being carried out by teenagers so that it damages their brains and minds. The most visible impact when teenagers are familiar with the world of karaoke nights is the quality of their education is damaged, their enthusiasm for learning decreases, and they are lazy to go to school.ABSTRAKPenelitian ini mengkaji tentang remaja dan karaoke malam. Tujuan penelitian ini adalah untuk mengetahui penyebab remaja pergi ke tempat karaoke malam dan dampak yang ditimbulkan karena sering karaoke malam. Metode Penelitian menggunakan analisis kualitatif. Hasil dari penelitian menunjukkan beragam penyebab remaja datang ke tempat karaoke malam. Ada diantara mereka berasal dari keluarga broken home sehingga remaja tersebut mencari tempat lain di luar rumah untuk berbagi dengan teman-temannya yang juga menyukai tempat karaoke sebagai pelampiasan rasa kecewa. Ada juga remaja ke tempat karaoke yang bertujuan mencari penghasilan tambahan. Mereka bisa bekerja sebagai pelayan atau menjadi penyanyi yang dibooking oleh pejabat atau pengusaha yang banyak uang. Bahkan ada remaja yang menjadi wanita penggilan untuk melayani mereka. Penyebab lain remaja ke tempat karaoke karena kurangnya pengawasan orang tua. Dampak yang ditimbulkan dari seringnya remaja ke tempat karaoke malam yaitu pergaulan yang tidak sehat yang cenderung mengarah ke pergaulan bebas yang sangat merugikan diri sendiri dan orang tua. Pergaulan bebas menjadi terbiasa dilakoni oleh remaja sehingga merusak otak dan pikirannya. Dampak yang paling terlihat ketika remaja sudah mengenal dunia karaoke malam adalah kualitas pendidikannya rusak, semangat untuk belajar turun, dan bermalas-malasan untuk sekolah.
Payment Information System For Acceptence New Students Using Virtual Account
Authors: Latif Abdul 
Published: May 2022

With the development of information technology that is so fast today, inevitably all aspects of life, including educational institutions, must follow. The university has also started implementing new student admissions through online media, from the registration process, payments, entrance tests and announcements of being accepted or rejected. In its implementation, find obstacles, how is the payment system? if you use a transfer, it's hard to tell which one pays the registration fee and the others. After discussing with the leadership, marketing team and the bank, it was decided to use the virtual account (VA) method.
The author then analyzes and designs an online new student admission payment information system using the virtual account (VA) method. The case study adopted in this study at the Merdeka University, Surabaya. Previously, new student admissions were carried out directly on campus, but in the current pandemic season, it is not possible for prospective students to come to campus considering the danger of covid is still very dangerous. Therefore, it is very appropriate if at this time Merdeka University Surabaya had to change the system from prospective students registering to come to campus using online media.
The method that the author uses in making this application with the waterfall, starting from the study of literature, analysis, design and implementation of the program. For registration and entrance test, the author uses web media and for payment processing the author uses the virtual account (VA) method.
On correctness of conditions for the CSIDH algorithm implementation on Edwards curves
Authors: Bessalov A.V. 
Published: May 2022

Incorrect formulation and incorrect solution of the problem of the CSIDH algorithm implementation on Edwards curves was revealed in one of the famous works. The purpose of this paper is to present a detailed critique of such concept with a proof of its inconsistency. Specific properties of three non-isomorphic classes of super singular curves in the generalized Edwards form are considered: full, quadratic, and twisted Edwards curves. Conditions for existence of curves of all 3 classes with order of curves over a prime field are determined. The implementation of the CSIDH algorithm on isogenies of odd prime degrees is based on the use of quadratic twist pairs of elliptic curves. To this end, the CSIDH algorithm can be built both on complete Edwards curves with quadratic twist within this class, and on quadratic and twisted Edwards curves forming pairs of quadratic twist. In contrast to this, the authors of a well-known work are trying to prove theorems that state that there is a solution within one class of curves with a parameter which is a square. The critical analysis of theorems, lemmas, erroneous statements in this work is carried out. Theorem 2 on quadratic twist in classes of Edwards curves is proved. The CSIDH algorithm modification based on isogenies of quadratic and twisted Edwards curves is presented. To illustrate the correct solution of the problem, an example of Alice and Bob calculations in the secret sharing scheme according to the CSIDH algorithm is considered for.
COMPARISON OF MERISTIC CHARACTERISTICS OF Barbodes schwanefeldii LIVING AROUND THE FLOATING NET CAGE AREA AND IN THE AREA WITH NO FLOATING NET CAGE IN THE KOTO PANJANG DAM RIAU PROVINCE
Authors: Sari Desi Maya , Putra Ridwan Manda , Windarti Windarti 
Published: May 2022

Barbodes schwanefeldii or kapiek fish is a type of freshwater fish that lives around the floating net cage area and in the area with no floating net cage in the Koto Panjang Dam. This study aims to determine the meristical characteristics of B. schwanefeldii living in that dam, especially around the floating net cage area and in the area with no floating net cage. This study was conducted in October-November 2021. Sampling was done 1 time, the number of fish collected was 68 fishes that were caught around floating net cage and 23 fishes that were caught in the area with no floating net cage. A total of 11 meristical characteristics were calculated and studied. Results shown that there were no significant morphological and meristical different of the fish living in the area with cage or in the area with no floating net cage. The the meristical characteristics were as follows: D III.8, P I.14, V I.8, A I.5, C 18. The number of scales in front of the dorsal fin was 13 scales, around the body was 28-30, around the caudal peduncle was 18, in the linea lateralis was 34-36, above linea lateralis was 8 and below linea lateralis was 4
PRODUCTION PERFORMANCE OF BRONZE FEATHERBACK (Notopterus notopterus, Pallas 1769) REARED WITH DIFFERENT STOCKING DENSITIES AND TYPES OF FEED
Authors: Yulindra Ade , Sukendi Sukendi , Aryani Netti 
Published: May 2022

Bronze featherback is one of Indonesia’s endemic fish that has high economic value and has begun to decline in population in nature. There should be attempts at bronze featherback farming to maintain its existence in nature. The purpose of this study was to analyze the production performance, feed retention, and glycogen accumulation of bronze featherback cultivated with stocking density and different types of feed. This study was conducted from May to August 2020 in Sungai Paku Village, Kampar Kiri sub-district, Kampar district. The experiment design used is a randomized complete design with two factors. Stocking density factor treatment consists of 5, 10, and 15 fish/m3 and type of feed factor consisting of trash fish and freshwater seashell meat feed. Bronze featherback was cultivated for 90 days. The fish was cultivated with 5% feed/day. Best result was in the stocking density of 5 fish/m3 and trash fish feed showed Absolute growth rate 50,05 g, Absolute length growth rate 11,48 cm, specific growth rate 2,83%, survival rate 86,7%, protein retention 68,68%, fat retention 34,11%, muscle glycogen 28,86 mg/g and liver glycogen 0,58 mg/g.
EFFECTS OF BIOFLOC AND PHOTOPERIOD MANIPULATION COMBINATION ON BLOOD STRUCTURE OF Pangasianodon hypophthalmus
Authors: Surbakti Yuli Anggreani Putri Br , Windarti Windarti , Eddiwan Eddiwan 
Published: May 2022

Pangasianodon hypopthalmus can be reared under biofloc system and short photoperiod. To understand the effect of biofloc system and photoperiod manipulation to wards blood structure of P. hypopthalmus a study was conducted on September to December 2020. This experiment using a factorial CRD design with 2 level for B factor (biofloc and no biofloc), 3 level for P factor (Natural, 18 hours dark, 24 hours dark), 3 repetition. The fish was reared in 110L tank, 30 fishes/tank, fed with fish pellet (FF-999, Provit 781-1 and Provit 781-2). Parameters measured were the number of erythrocytes, leukocytes, the level of hematocrit and leukocrite and leukocyte types. The blood was collected using syringe wetted with EDTA 10%. The number of blood cells was calculated using haemocytometer, while the white blood cells were stained using Giemsa solution and checked under a binocular microscope. Results shown that there is no different blood structure in fish of all treatments. Total erythrocytes are 1,681,111-2,647,777 cell/mm3, total leukocytes are 55.031-55.655 cell/mm3, hematocrit 20.33-38.11% and leukocrite 20.33-38.11%. White corpuscle are basophil 00-3.89%, eosinophils 0-3.67%, lymphocytes 26.67-73.89%, trombosit 1-48.89%, monocytes 13.33-30.22% and neutrophill 0.00-9.22%. Based on data obtained, it can be concluded that the biofloc system and photoperiod manipulation combination do not negatively affects the fish hematology.
IDENTIFIKASI PERTIMBANGAN PEMILIHAN KOMPONEN PENYUSUN AGROFORESTRI SALAK DI DESA SIATARATOIT KECAMATAN ANGKOLA BARAT KABUPATEN TAPANULI SELATAN
Authors: Harahap Mikrajni , Mardhiansyah Muhammad , Darlis Viny Volcherina 
Published: May 2022

Salacca sumatrana Becc is one of the Salacca zalacca which has been widely known to the public, especially in North Sumatra. Sitaratoit village is one of the Salacca sumatrana Becc producing areas, which each household has Salacca sumatrana Becc fields planted on its own as well as inherited from the family. The farmers decision on species selection was important as a consideration for developing agroforestry patterns in the future because risk factors were always present in each selection specific tree species. The purpose of this study was to identify the basis component selection of Salacca sumatrana Becc agroforestry based on community perceptions in Sitaratoit Village. The research data was obtained from in-depth interviews conducted in Sitaratoit Village using the purposive sampling method. This research showed that based on cultural, economic and ecological factors, the constituent components of Salacca sumatrana Becc agroforestry in Siataratoit village were as follows: Salacca sumatrana Becc as the main commodity, Hevea brasiliensis, Durio zibethinus, and Persea americana as a shade tree and protective tree, Gmelina arborea and Toona sinensis as a land divider.
PERSEPSI PARA PIHAK TERHADAP KEARIFAN LOKAL MASYARAKAT DALAM MELESTARIKAN HUTAN DI KENEGERIAN ROKAN KECAMATAN ROKAN IV KOTO KABUPATEN ROKAN HULU
Authors: Izzati Mawaddatun , Mardhiansyah Muhammad , Sribudiani Evi 
Published: May 2022

Kearifan lokal berguna sebagai pengetahuan hidup maupun sebagai perilaku manusia dalam melestarikan lingkungan. Kearifan lokal dalam melestarikan hutan sudah berkurang, keberadaan hutan di Kenegerian Rokan semakin menurun. Penelitian ini bertujuan untuk mengetahui persepsi para pihak terhadap kearifan lokal masyarakat Rokan dalam melestarikan hutan di Kenegerian Rokan. Metode pengambilan sampel menggunakan teknik porposive sampling sebanyak sepuluh responden. Data dianalisa secara deskriptif kualitatif. Hasil penelitian menunjukkan bahwa kearifan lokal sudah tidak dijaga dengan baik dan tidak berlaku lagi. Tokoh masyarakat yang berperan di Kenegerian Rokan adalah tokoh adat, tokoh agama dan tokoh pendidikan. Banyaknya tokoh masyarakat yang mementingkan kepentingannya sendiri dan memberlakukan sanksi yang tidak tegas, telah membuat masyarakat tidak peduli satu sama lain dan menimbulkan banyak konflik. Hal ini menimbulkan ketidakpercayaan masyarakat terhadap Ninik Mamak selaku tokoh masyarakat dan menyebabkan masyarakat tidak lagi menjaga dan memelihara kelestarian hutan.
VALUASI EKONOMI AREN (Arenga pinnata MERR) DI DESA KIYAP JAYA KECAMATAN BANDAR SEIKIJANG KABUPATEN PELALAWAN PROVINSI RIAU
Authors: Afifa Morina Widya , Oktorini Yossi , . Mukhamadun 
Published: May 2022

Aren (Arenga pinnata Merr) was one of the non-wood forest products that could be used start from sap, fruit, palm fiber, stems, leaves, and roots. Almost all products have economic value. This research was to study the benefits and have the economic values in Kiyap Jaya Village, Bandar Sei Kijang District, Pelalawan Regency, Riau Province. This recearch used a qualitative descriptive method by using economic analysis by asking for market prices and obtaining productivity. The sugar palm parts that are truly utilized by the community are roomie, fruit, and roots. As for the fibers, the stems and leaves has not been maximally utilized. The sap was used as an alternative medicine for diabetes mellitus and kidney failure. The Fruit was useful as a mixture of food and roots that are used as a tonic and urinary stones. The total economic value in the Kiyap Jaya Village was Rp. 31,450,000 per stem in one year, which was the highest economic value in the room of Rp. 25,550,000 per-month.
KARAKTERISTIK GLULAM BAMBU APUS (Gigantochloa Apus) MENGGUNAKAN PEREKAT STYROFOAM BERDASARKAN JUMLAH DAN POLA PEYUSUNAN LAPISAN
Authors: Putra Rezki Bela , Sribudiani Evi , Somadona Sonia , . Pebriandi 
Published: May 2022

Wood was a construction raw material that has long been developed before the advent of concrete and steel technology. The need of wood raw materials for construction was increasingly increasing while the availability of high quality wood was increasingly scarce. Therefore, in order to meet this an effort was needed to produce raw materials to replace wood, its was the development of laminated products or glulam made of bamboo apus (Gigantochloa apus) as structural and construction materials. Based on this, this study was conducted to determine the quality of glulam from Gigantochloa apus by using styrofoam adhesives based on number and pattern of layer arrangement. Sample was made of Gigantochloa apus with sized 30cm × 10cm arranged with the number and pattern of layer arrangement that have been determined. This study uses a complete randomized design combination with two treatments. Factor A was the number of layers (three layers, four layers and five layers) and factor B was the arrangement pattern (diagonal, horizontal and vertical). The physical and mechanical properties of glued laminated beams of Gigantochloa apus were tested based on JAS 234: 2003 Standard. The results showed that the quality of glulam met the physical properties of moisture content. While the mechanical properties of MOE and MOR did not meet the standards, so they did not be use as structural materials. Combination with horizontal, diagonal and horizontal lamina arrangement patterns gives the best results on the mechanical properties of glulam.
Genetic Change of Pharella acutidens Influenced by Pb and Cd Metals in Rupat Strait Waters
Authors: Ginting Tri Vani Bernadetha , Nasution Syafruddin , Effendi Irwan 
Published: May 2022

Rupat Strait related to the Strait of Malacca is a national and international shipping lane and makes the region affected by anthropogenic activities that result in a decrease in the quality of the waters such as the increasing amount of heavy metal content. The most easily contaminated organism of heavy metals is bivalves due to and its low mobility, bivalves being filter feeders, and the ability to accumulate contaminants,. The purpose of this study was to look at genetic changes in bivalves (P.acutidens) contaminated by heavy metals. The study was conducted from February to March 2021. Bivalve sample was collected from the waters of Rupat Strait and sample analysis was conducted in the Marine Biology Laboratory and Genetics Laboratory of Riau University. Bivalve DNA is isolated with Geneaid Tissue Genomic DNA Mini Kit. DNA isolation results were then carried out PCR process and sequencing process was carried out in PT. Genetika Science Indonesia. The results of study show that sequencing results obtained by samples derived from Selinsing have the most changes in the composition of nitrogen bases compared to samples from the other two stations.
Structure Community and Distribution of Benthic Foraminifera in the Waters of Bagan Tanjungbalai Village Asahan Regency North Sumatera Province
Authors: Pohan Rizal Suardiman , Rifardi Rifardi , Efriyeldi Efriyeldi 
Published: May 2022

This research was conducted in March 2019 in the waters of Bagan Tanjungbalai Village Asahan Regency North Sumatera Province. The purpose of the study were to analyze the community structure and distribution of benthic foraminifera. Determination of the research was purposive sampling of 4 station with 3 sampling points where the distance each sampling point was 50 meters wich were based on the initial sampling point. In the study area were found 24 species of foraminifera. The study showed that composition of sediment organic matter involved 4.97 - 15.26%, while the abundance of benthic foraminifera was between 13690 - 28571 ind/m2. Defferences of the abundance of benthic foraminifera at each station obtained a significant value of 0.01 or p < 0.05, which means a difference the abundance of benthic foraminifera beetwen stations,but not significant. While the relative abundance between sampling is only 0.15-21.00%, while the relative sedimentation rate between sampling is 15.38 - 33.02%.
Effect of Sediment Particle Sizes on The Density and Morphometrics of Seagrass Enhalus acoroides Leaves at Pandaratan Beach Tapanuli Tengah
Authors: Banjarnahor Novia , Samiaji Joko , Nasution Syafruddin 
Published: May 2022

This study was conducted in March - May 2020 at Pandaratan Beach Tapanuli Tengah with the aims in observing the size of the sediment particles, the density of Enhalus acoroides, the morphometrics of seagrass leaves, and to analyze the effect of the average sediment particle size on the density and morphometrics of the seagrass leaves. The study used a survey method. Study stations were choosen by purposive sampling and the samples were observed by using a transect line method. The results showed that the particle size ranged from 0.097 - 0.364 mm. The highest density was at Station II with fine sand categories with a value of 37.89 stands/m2 and the lowest density was at Station I with medium sand sediment particles with a value of 25.44 stands/m2. The longest leaves was found at Station II with a value of 84.09 cm and the shortest was at Station I with a value of 65.93 cm. The widest leaves of E. acoroides was at Station II with a value of 1.92 cm and the narrowest was at Station I with a value of 1.81 cm. Simple linear regression test showed that effect of the sediment partikel size on the density and morphometrics of seagrass leaves.