bluuebunny/crossref_metadata_2025 huggingface dataset:
Diagnosis of cylindrical projections and analysis of suitability for the territorial area of South America
Authors: Barbosa Leonardo Carlos , Canto Luiz Filipe Campos do , Ferreira Willian dos Santos , Torres Max Vinicius Esteves , Silva Andresa Ayara Torres e
Published: April 2021

Cartographic Projection can be defined as the mathematical relationship between the position of a model of the terrestrial surface and the flat surface. Cylindrical projections are employed around the world, taking into consideration their properties and special characteristics. The purpose of this study was to identify the cartographic projection that best represents South America terrestrial surface, focusing mainly on the area of the continent, determined by the South American Defense Council. Initially, the projections were selected based on a bibliographic review. Subsequently, a suitability judgment was made for South America applying Tissot Indicatrix, Isolines of Maximum Angular Distortion and Region of Acceptable Distortion. Finally, an assumption was drawn up among the best results. The study control was performed using the software Flex Projector and ArcGIS 10.1, computational resources of great use in Cartography. The study provided a clear, simple and objective understanding of how different projections behave. The motivation comes from the insufficiency of detailed information and applied to the choice of map projection in regions of large areas.
Reflexiones sobre el concepto de Ciudad Saludable a partir de tres ciudades del Noreste Brasileño
Authors: Serrano Oriana Yenahi Andrade , Oliveira Isabela de Araújo , Silva Thiago Gilney Ferreira , Barbosa Ricardo Victor Rodrigues
Published: April 2021

El presente artículo reflexiona sobre el concepto de ciudades saludables frente al repertorio encontrado en el ambiente urbano del Noreste Brasileño. Con el fin de evaluar la conformidad del espacio urbano construido y lo esperado de una ciudad saludable, según lo postulado por la Organización Mundial de la Salud (OMS), se realizó un levantamiento fotográfico en los municipios de Petrolina (PE), Arapiraca (AL) y Maceió (AL), y, con apoyo en la literatura se realizó un análisis comparativo de las fotografías generadas. Se observó que el modelo de desarrollo actual de las ciudades estudiadas está compuesto por prácticas coherentes y otras disonantes a lo esperado para una ciudad saludable. Asimismo, fue posible notar que la discontinuidad que genera el encuentro entre los espacios saludables y los espacios hostiles origina estratificación en el espacio urbano y en la sociedad que los habita. Finalmente se percibió la tendencia, principalmente en edificaciones recientes a mostrar indiferencia hacia prácticas urbanamente saludables. Esta realidad evidencia la importancia de agilizar el enfoque en los paradigmas sociales y la planificación urbana sobre la consciencia ambiental.
Análise da morfologia urbana para geração de energia solar fotovoltaica em Belém - PA
Authors: Maia Ana Lídia Aragão , Blasques Luis Carlos Macedo , Monteiro Marcela Marçal Maciel
Published: April 2021

A fonte solar fotovoltaica é aquela que apresenta as melhores possibilidades de integração ao meio urbano dentre todas as demais fontes de geração de eletricidade e representam uma das soluções tecnológicas mais utilizadas e em processo de estudo no que se refere aos aspectos relativos à eficiência energética predial. O artigo analisa a influência da morfologia urbana na geração de energia fotovoltaica, no bairro do Marco, na cidade de Belém, Pará (Brasil). Os padrões urbanísticos juntamente com fatores de radiação solar, identificam parâmetros que maximizam ou minimizam o aproveitamento do recurso solar para a geração de energia fotovoltaica. Foi utilizado o software SketchUp, com o plug-in Skelion, para modelar em duas edificações específicas do bairro que representavam a predominância da tipologia arquitetônica local: edificações térreas e verticais de padrão residencial até 4 pavimentos. Os resultados obtidos demonstram que em todas as superfícies instaladas, obteve-se, mesmo com as perdas por orientação e inclinação, um valor suficiente que suprisse a necessidade de geração de cada uma das unidades habitacionais estudadas.
Study on Analysis of Molecular Diversity and Trait Association for Zinc Deficiency Tolerance in Rice under Submerged Conditions
Authors: Salini A.P. , Dhandapani M.
Published: April 2021

Background: Rice is the most important human food crop in the world and its production is affected by various biotic and abiotic stress including low soil fertility. Zinc deficiency is one of the most important micronutrient deficiencies limiting rice yield. The vast reserve of germplasm of rice grown in different eco systems could be screened to exploit the genotypic differences bfor zinc deficiency tolerance. With the advent of molecular markers, association mapping strategy based on non-random associations between causative loci and phenotype could be employed to resolve the complex traits like zinc deficiency tolerance. With this background, the current study is focused to explore the extent of variability for zinc deficiency tolerance using zinc deficiency score and quantitative traits among 44 germplasm accessions and to identify quantitative trait loci associated with zinc deficiency tolerance using Simple Sequence Repeat (SSR) marker-based association mapping. Methods: A set of 44 accessions consisting of landraces and improved varieties were selected based on their zinc deficiency score in field (Zn=0.64 ppm) screening experiment conducted in Regional Research Station, Paiyur, Tamil Nadu. Eight accessions from each Zn Def score group along with four other genotypes namely Savulu Samba, Kotta Nel, Paiyur 1 and ADT 39 were chosen for the study. Molecular analysis was carried out among the selected accessions using a total of 40 random Simple Sequence Repeat (SSR) primers. Result: Our study revealed the existence of diversity at molecular level among the selected accessions. Clustering analysis separated the accessions in two major clusters which were in accordance with the population structure analysis which resulted with two sub-populations. Through our study we identified certain accessions namely, Karuppu Nel, Manipur Local and BAM 440 which recorded high yields along with least zinc deficiency scores implying their ability to act as donors for zinc deficiency tolerance under submerged condition. Subsequent association analysis which resulted in putative association of zinc deficiency score with critical plant traits such as plant height and number of productive tillers, revealed that association mapping could be a viable strategy for understanding genetic mechanism of zinc deficiency tolerance in rice.
Development of Somaclones through Callus Culture in Fenugreek (Trigonella foenum-graecum) Variety Gujarat Methi-2
Authors: Patel S.R. , Abhishek Dinisha , Patel H.N. , Patil S.S. , Patel S.G.
Published: April 2021

Background: Fenugreek (Trigonella foenum-graecum) a widespread aromatic herb, holds an important place in Indian traditional medicine system. A fenugreek or methi seed commonly used to flavour food contains various alkaloids, different saponins and fixed oil content. The steroidal nature of natural saponins has high market potential as alternative to Dioscore species, the current declining resource of commercial saponins. The current experiment designed to induce and identify somaclone variants of fenugreek resistant to powdery mildew, rich in saponins and fixed oil content with acceptable yield. Methods: Seeds of fenugreek var. Gujarat Methi-2 (GM-2) were used for in vitro regeneration during 2019 laboratory experiment. Explants cultured on Murashige and Skoog (MS) media supplemented with different concentrations of 2,4-D and NAA. The induced calluses were further transferred in to the regenerated semi solid MS medium with various levels of BAP for the development of calliclones. For root induction, shoots were transferred in White’s rooting media with different concentrations of Indole Acetic Acid. Result: Our experimental findings shows induction and detection of somaclonal variants, as a possible source of genetic improvement in fenugreek with limited information on genetic diversity. This approach could generate new genotypes useful to pharmaceutical industries with competitive yield and resistance to powdery mildew.
Genetic Diversity Assessment in Dolichos Bean (Lablab purpureus L.) Based on Principal Component Analysis and Single Linkage Cluster Analysis
Authors: Singh S.R. , Rajan S. , Kumar Dinesh , Soni V.K.
Published: April 2021

Background: Dolichos bean occupies a unique position among the legume vegetables of Indian origin for its high nutritive value and wider climatic adaptability. Despite its wide genetic diversity, no much effort has been undertaken towards genetic improvement of this vegetable crop. Knowledge on genetic variability is an essential pre-requisite as hybrid between two diverse parental lines generates broad spectrum of variability in segregating population. The current study aims to assess the genetic diversity in dolichos genotypes to make an effective selection for yield improvement. Methods: Twenty genotypes collected from different regions were evaluated during year 2016-17 and 2017-18. Data on twelve quantitative traits was analysed using principal component analysis and single linkage cluster analysis for estimation of genetic diversity. Result: Principal component analysis revealed that first five principal components possessed Eigen value greater than 1, cumulatively contributed greater than 82.53% of total variability. The characters positively contributing towards PC-I to PC-V may be considered for dolichos improvement programme as they are major traits involved in genetic variation of pod yield. All genotypes were grouped into three clusters showing non parallelism between geographic and genetic diversity. Cluster-I was best for earliness and number of cluster/plant. Cluster-II for vine length, per cent fruit set, pod length, pod width, pod weight and number of seed /pod, cluster III for number of pods/cluster and pod yield /plant. Selection of parent genotypes from divergent cluster and component having more than one positive trait of interest for hybridization is likely to give better progenies for development of high yielding varieties in Dolichos bean.
Rotational wood welding of Dalbergia sissoo wood: forming longitudinal tongue-and-groove and butt joints
Authors: KUMAR Shailendra , SHUKLA Shikhar , KANT SHUKLA Krishna
Published: April 2021

Wood joinery is an essential part of woodworking for product manufacture. Wood sections are mostly joined together with adhesives. Wood welding brings a new dimension to joinery by using mechanical friction to induce a flow of wood components ensuring adhesion. In this study, a customized spin wood-welding machine was used to join wood sections of Dalbergia sissoo. Butt and tongue-and-groove joints were prepared and welded using the machine. The tensile strength of the joints was tested. The impact on joint strength of increasing the friction area by introducing tongue-and-groove joints was tested and analyzed. The tensile strength for butt joints at 1,200 rpm welding was estimated at 5.3 MPa. Joint strength was found to increase substantially (by 66%) with a tongue-and-groove welding section. Weld line temperatures at different spin times were also investigated. The aim of this study is to apply welding technology to Dalbergia sissoo to achieve greater joint strength.
Descriptif technique de bois d’essence tropicale – Bilinga
Authors: GÉRARD Jean
Published: April 2021

Extrait de l’Atlas des bois tropicaux – Caractéristiques technologiques et utilisationsJ. Gérard (coord), D. Guibal (au.), J.-C. Cerre (au.), S. Paradis (au.), et 40 auteurs, 2016.Éditions Quæ, 1000 p.
Utilizzo del Selfy-MPI quale strumento predittivo di fragilità in una coorte di pazienti HIV ultracinquantenni: risultati...
Authors: S Dini , al. et
Published: April 2021

Questo lavoro pone l’attenzione sulla frailty delle persone che vivono con l’infezione da HIV, con lo scopo di validare il Selfy-MPI come strumento utile a valutare i pazienti ad alto rischio. Il test è stato somministrato a un campione di pazienti di 50 anni e oltre, afferenti all’ambulatorio dell’Ospedale Galliera a Genova e dell’ASL-1 Imperiese. I risultati preliminari mostrano che il Selfy-MPI è un test affidabile nell’individuare i pazienti fragili, e che i suoi valori correlano con gli eventi clinici non AIDS.
MIRROR FOOT, POSSIBLE CORRECTION OF DEFORMATION – CASE REPORT
Authors: Grzegorzewski Paweł , Stańczak Kamila , Grzegorzewski Andrzej , Kozłowski Piotr
Published: April 2021

The mirror foot is a rare, congenital defect characterized by a mirror image of polydactyly. Due to a small number of cases and rarity of this condition, the definitions and classifications are incomplete. This report provides description of the treatment of patient hadeight fingers and eight metatarsal bones in his right foot with normal crus bones. A positive result of treatment was achieved with surgical treatment by removing the three middle fingers along with the metatarsal bones and bringing the first and fifth radii of the foot closer. One year after surgery, the appearance and function of the foot are normal, and the child is wearing standard footwear. There are no clear guidelines for treatment of mirror foot. In the case of proper tibia and fibula, resection of the excess radii of the foot is recommended, starting with the hypoplastic radii. Keywords: mirror foot, resection of foot radius, deformation classification
¿Es la Teoría general una “teoría económica de la depresión”? Inestabilidad financiera y crisis en el pensamiento monetario de Keynes
Authors: Bibow Joerg
Published: April 2021

En este artículo se reexaminan los escritos de Keynes desde Moneda y finanzas de la India (1913/1971) hasta la Teoría general de la ocupación, el interés y el dinero (1936a/1965), en particular, con un enfoque en la inestabilidad financiera. El análisis revela la aguda atención de Keynes hacia la estabilidad y la fragilidad del sistema bancario, sobre todo en condiciones deflacionarias. Los escritos de Keynes durante la Gran Depresión muestran cómo ésta pudo haber influido en su Teoría general. Al explorar la relación entre la experiencia de la Gran Depresión y el marco teórico que presenta Keynes en su obra, se encuentra que el supuesto de un acervo constante de dinero es decisivo en esta última. En el análisis se argumenta que la Teoría general no es un caso especial de la teoría (neo)clásica sólo pertinente para la “economía de la depresión”, lo cual refuta la interpretación ofrecida por J. R. Hicks (1937) en su influyente artículo “Keynes y los clásicos: una posible interpretación”. Como especialista de la Gran Depresión y presidente de la Reserva Federal de los Estados Unidos durante la reciente crisis, Ben Bernanke proporciona un importante puente intelectual entre la crisis histórica de la década de los treinta y la crisis moderna de 2007-2009. Se concluye que, si bien el ejercicio de la política ha cambiado, la teoría “clásica” que Keynes atacó en 1936 mantiene actualmente su hegemonía; la (mala) interpretación habitual de la Teoría general como economía de la depresión sigue explicando el fracaso de la corriente económica dominante para participar en el campo de la economía monetaria de manera significativa.
La evolución del pensamiento económico en el último cuarto de siglo y su influencia en la América Latina
Authors: Noyola Vázquez Juan F.
Published: April 2021

En este artículo, publicado originalmente en 1956, Juan F. Noyola realiza un recuento sobre los modelos para la teoría económica que imperaron hasta ese momento del siglo XX, en particular a partir de la Gran Depresión, fenómeno del cual se desprendieron diversas teorías importantes que buscaban explicarlo y darle solución. Sin embargo, menciona que dichas teorías deben estudiarse desde una perspectiva crítica con el fin de aplicarse a las circunstancias latinoamericanas. Asimismo, el autor destaca la importancia de plantear una teoría del desarrollo, así como la de retomar las ideas de Marx de manera integral para tal teoría.
Por qué los Estados Unidos necesitan un salario mínimo de 15 dólares. La Ley para Aumentar el Salario beneficiaría a los trabajadores estadunidenses y a sus familias
Authors: EPI Economic Policy Institute , NELP National Employment Law Project
Published: April 2021

Este documento aborda la propuesta de ley en los Estados Unidos para aumentar el salario mínimo en dicho país a 15 dólares por hora para 2025. Analiza las implicaciones que tendría aprobar esta ley y aporta diversos argumentos bien fundamentados en su favor. Asimismo, refuta aquellos planteamientos que se han realizado de parte de diversas instancias en contra de un aumento del salario mínimo. Llega a la conclusión de que aprobar esta ley no únicamente aporta grandes beneficios a la economía del país, sino que además es sumamente necesario para combatir la desigualdad de ingresos.
Juan Noyola Vázquez: precursor de la vertiente progresista del pensamiento estructuralista latinoamericano
Authors: Paz Pedro
Published: April 2021

Este artículo realiza un homenaje al trabajo de Juan Noyola Vázquez, reconocido economista mexicano. Examina su trayectoria como académico e investigador innovador y comprometido, así como el legado que ha dejado en la teoría económica latinoamericana. En particular, aborda las aportaciones de Noyola respecto del estudio sobre la inflación y las confrontaciones teóricas en relación con el tema entre el estructuralismo y el monetarismo, así como la participación del economista en la Revolución cubana.
La duración en el mercado de vivienda nueva construida por desarrolladores en México
Authors: Rodríguez Zamora Carolina , Morales Ramírez Alejandro
Published: April 2021

En el presente artículo estudiamos la duración en el mercado de las viviendas nuevas construidas por desarrolladores en México entre 2013 y 2015. En particular, se analiza si las características físicas de la vivienda, el estado en el que se localizan, la fecha en que fueron puestas a la venta, la duración de la construcción, el precio inicial, el tamaño de la empresa desarrolladora y el tamaño del conjunto habitacional tienen algún efecto sobre la duración de las viviendas en el mercado. Utilizamos un modelo de análisis de supervivencia de Cox. Los resultados más importantes indican que la posibilidad de que se venda una vivienda decrece conforme pasa el tiempo y, en general, es menor para las viviendas de mayor precio, las de mayor tamaño, las que tomaron más tiempo en construirse, así como aquellas en conjuntos habitacionales más pequeños y construidas por empresas desarrolladoras de menor tamaño.
Prebisch, Furtado y Bresser-Pereira: aportes de los padres del desarrollismo clásico y el nuevo desarrollismo
Authors: Villaverde João , Rêgo José Márcio
Published: April 2021

Una directriz une los pensamientos de Raúl Prebisch, Celso Furtado y Luiz Carlos Bresser-Pereira, economistas de generaciones, países e historias de vida muy diferentes: sus motivaciones siempre han sido actuar y participar en el debate público para mejorar las políticas económicas. Activos en el sector público de sus países como presidentes de bancos centrales y ministros de Estado, Prebisch, Furtado y Bresser-Pereira han realizado aportes relevantes a la literatura económica derivados principalmente de preocupaciones sobre la gestión de instrumentos de política económica. Aquí también contrastamos el desarrollismo clásico de Prebisch y Furtado con el nuevo desarrollismo de Bresser-Pereira.
The addition of Daphnia magna and Ascorbic Acid to Angelfish Feed to Improve Its Growth and Immune Response (Pterophyllum scalare)
Authors: Wiratama Titan Aji , Kusumaningdyah Dessy Amitha , Zubaidah Anis , Hermawan David , Handajani Hany
Published: April 2021

HighlightThe growth of angelfish which supplemented D. magna enriched ascorbic   acid was identified and analyzedThe survival rate of angelfish after challenge test using A. hydrophylla was identified and analyzedThe composition of ascorbic acid in D. magna was analysed using iodometry titration test D. magna that has been added ascorbic acid was analyzedAbstractAngelfish (Pterophyllum scalare) is a tropical ornamental fish in freshwater with considerable potential in the global market and promising cultivation. However, it has a slow growth. The purpose of this research was to find the impact of giving feeding variations, namely D. magna that enriched ascorbic acid on improving the angelfish growth and its immune response. The research method used was Completely Randomized Design (CRD) using four treatments and three replications. The dosage of ascorbic acid consisted of 0 mg/L, 50 mg/L, 100 mg/L, and 150 mg/L. The fish was fed twice a day and applied with ad libitum. The result showed the addition of ascorbic acid had impacted its growth, and it produced SGR 2.393±0.003 %/day and challenge tests. The Survival Rate (SR) after challenge test was 79.99±1.000 %. In conclusion, the highest amount of growth and survival was treatment D (150 mg/L).
Study of Seaweed Kappaphycus alvarezii Explants Growth in the Different Salinity Concentrations
Authors: Aris Muhammad , Muchdar Fatma , Labenua Rusmawati
Published: April 2021

HighlightThe best salinity for the thallus growth of K. alvarezii is 32 mg/LThe salinity indicates the osmotic balance of K. alvarezii seaweedThis osmoregulation process affects the nutrient absorption of K. alvarezii seaweedThis study aims to develop the availibility of superior seeds of K. alvareziiAbstract Kappaphycus alvarezii is one of the leading commodities in Indonesian waters. Demand for this commodity is quite high, as reflected in the increasing volume of exports each year. Fulfillment of these demands is obtained from the production of cultivation. Generally farmers get natural seaweed seedlings, namely cuttings from existing seaweed. The continuous use of seeds from nature can cause deterioration in the quality and quantity. Handling the problem of quality deterioration from seaweed seeds originating from nature, can be overcome by multiplying the seeds through tissue culture methods in vitro. In term of tissue culture techniques method, the most important thing to note is environmental parameters. An environment parameter that changes suddenly such as salinity can inhibit the growth of seaweed. Thus, this work is attampting the different salinity treatment on seaweed explants K. alvarezii. This study aims at determining (weight) the explants of K. alvarezii with a comparison of the different salinity levels in the in vitro tissue culture method. The method used in this study was a completely randomized design (CRD) with the different salinity treatments namely 30, 31, 32, 33, and 34 ppt. The results showed that the different salinities influenced the growth rate of K. alvarezii seaweed explants with the best explant growth at the salinity of 31 ppt, while the lowest growth value was obtained at 34 ppt
Characteristics of Population Growth and Mortality of Windu Shrimp (Penaeus monodon) in the Juata Water of Tarakan City, Indonesia
Authors: Salim Gazali , Handayani Kun Retno , Indarjo Agus , Ransangan Julian , Rizky Riky , Prakoso Lukman Yudho , Pham Yen Thi Hong
Published: April 2021

HighlightThe sex ratio of tiger prawns in the waters of female groceries is 1.08 times higher than that of males.The  growth  characteristic of male and female tiger prawns is negative   allometry, but the male and female body shapes are fat.Fishing mortality, capture mortality, exploitation rate, female tiger prawns are higher than males, but total mortality and natural mortality male tiger prawns are higher than females.The male infinitive growth is longer than the female.AbstractThe windu shrimp (Penaeus monodon) is an economically important fishery species in the waters of Tarakan. The shrimp is highly demanded for frozen seafood industry that makes its market price range attractive from Rp. 50,000 (USD 3.37) to Rp. 70,000 (USD 4.72)/kg. This can cause the species to be potentially exploited. However, due to lack of data, the exploitation status of the windu shrimp is unknown. Hence, the present study was carried out to determine the absolute growth, mortality, and exploitation level of the windu shrimp in Juata waters of Tarakan. Sampling of the shrimp using experimental trawling net was conducted four times between June and August 2020 in the waters of Tarakan. Morphometric data of the windu shrimps including sex, total length, carapace length, and total weight were recorded and analyzed. The results showed that the sex ratio of male and female tiger prawns was 1:1.08. The maximum growth of male and female shrimps was estimated at 26.875 and 21.435 cm respectively. The size of the male shrimps caught during the sampling ranged between 8.7 and 22.5 cm, and was estimated to be at 13 to 67 days old respectively. Maximum growth of male shrimp was estimated at 26.875 cm that could be achieved within 411 days. The size of female shrimp caught during the sampling ranged from 9.8 to 19.3 cm with an estimated age of 21 to 87 days respectively. The maximum growth for female shrimp was estimated at 21.435 cm, and achievable within 377 days. The mortality of male and female shrimps was not significantly different at 110.3% and 110.1% respectively. The fishing mortality for male and female shrimps was recorded at 19% and 22.5% respectively. The level of exploitation of male and female shrimps was slightly different at 17.2% and 20.5%, respectively. Finally, the natural mortality for male and female shrimps was at 91.3% and 87.5%, respectively.
Bioaccumulation of some Heavy Metals in Red mullet (Mullus barbatus) and Common pandora (Pagellus erythrinus) in Zliten Coast, Libya
Authors: Ighwela Keri Alhadi , Al-Kazaghly Ragab Farag , Hamid Mohamed
Published: April 2021

Highlight Investigated in heavy metal bio-accumulation in red mullet (Mullus barbatus) and Common pandora (Pagellus erythrinus) collected in Zliten Coast, Libya.Based on the samples collected, the muscle tissue of fish species may be considered suitable for human consumption.The metal concentration levels observed were in range of acceptable limits proposed by regulations of WHO and FAO.AbstractThe current study aimed to determine the heavy metal concentration like as copper (Cu), zinc (Zn), lead (Pb), cadmium (Cd) and mercury (Hg) in the liver, gills, gonad and muscles in two fish species (red mullet (Mullus barbatus), and common Pandora (Pagellus erythrinus) collected from the Zliten coast in Libya. The levels of heavy metals were determined by using an atomic absorption spectrophotometer (AAS). The results showed that the concentration of heavy metals in the sampled fishes less than the permissible limits for human consumption. In addition, the bioaccumulation for Cu, Pb, Cd, and Hg by both fish species was: liver >gills > gonads > muscles, while Zn follows the sequence: gonads > liver > gills > muscles.
The Length-Weight Relationship and Condition Factors of Bullet Tuna Landed at the Tanjung Luar Fishing Port, Indonesia
Authors: Asrial Evron , Arapat Yasir , Hadi Usma Kurniawan , Kalih Lalu A.T.T.W.S , Liliyanti Mita Ayu , Rosadi Erwin , Khasanah Ruly Isfatul , Rathnayake Ishani Nelunika
Published: April 2021

HighlightBullet tuna (Auxis rochei Risso 1810) has been identified (measured, weighed) and analyzed.The resource status of bullet tuna has been estimated based on body shape and age group.LWR curve is implemented to describe and express the age group of bullet tuna (immature, adult/mature, old)This study has resulted the composition and ratio of bullet tuna that is suitable to be caught, fit for consumption and worthy of maturationAbstractBullet tuna (Auxis rochei Risso 1810) or tongkol lisong (Indonesian) is important for human consumption and health as well as an income source for fishers and coastal communities. Its utilization problems are over exploitation, catch domination by immature groups, and the threatened stock security of the bullet tuna (BLT). This research aimed to determine the status of the prospective parent of bullet tuna caught in the Lesser Sunda region, particularly from the Alas Strait to the Indian Ocean, West Nusa Tenggara (WNT). Meanwhile, the data were collected from July to September 2020 (2nd transitional season) at the Tanjung Luar Fishing Port, East Lombok and a dependent survey method was adopted with sampling, interview, observation, and documentation techniques. Fork length and body weight data were used to estimate the length and weight relationship, growth pattern, condition factor, fish age group, and catch worth. The primary and secondary data were processed quantitatively using several equations. The growth pattern of bullet tuna was minor allometric (b = 2.875), worth selling (K > 1.00), and the majority was adult fish or mature group. The LWR model is . This condition indicates the bullet tuna is worth catching  and worth spawning, so that it is eligible to be a potential broodstock candidate to support a sustainable management of BLT fisheries. Furthermore, fishers have applied the code of conduct for responsible fisheries (CCRF) in supporting the sustainable development goals.
The Effectiveness of Filopaludina javanica and Sulcospira testudinaria in Reducing Organic Matter in Catfish (Clarias sp.) Aquaculture Wastewater
Authors: Lailiyah Shofiyatul , Arfiati Diana , Hertika Asus Maizar Suryanto , Arum Neni Diah Kusumaning , Noviya Catur Budi
Published: April 2021

HighlightCatfish aquaculture wastewater contains organic matter that exceeds the quality standard of 68.75 mg / L and 72.48 mg / L.Tutut Jawa snail (F. javanica) can reduce organic matter in waste by up to 92%.Susuh Kura snail (S. testudinaria) can reduce organic matter in waste by up to 87%.Catfish aquaculture wastewater treatment with snails only takes 8 hours. Abstract The residual or wastewater from the cultivation process that is discharged directly into common waters can reduce the quality of the waters because it contains a lot of organic material from organism feces and feed residue, so it needs management first. The purpose of this study was to determine the ability of Javanese snails and freshwater gastropods to reduce total organic matter in catfish culture waste. The research method used was the experiment with 2 factor Factorial completely randomized design, namely the measurement time (4, 8, 12, and 16 hours) and the abundance of the Tutut Java snail and freshwater gastropods (100%, 75%, 50%, 25%, and control) with 5 repetitions. Tutut Java snails were taken from the pond at UPR Sumbermina Dau and brought to the laboratory. The results obtained in the treatment with the addition of  Tutut Java snail, the total organic matter content decreased at 75% snail density by 90% (from 68.75 mg / L to 5.31 mg / L) at the 12th hour. The treatment with the addition of Freshwater Gastropods at a density of 25%, the total organic matter content decreased by 87% (from 72.48 to 9.35 mg / L) at the 8th hour. Water quality during the study was in a condition that could tolerate the Tutut Java snails and freshwater gastropods. The conclusion is that the addition of Tutut Java snail and / or freshwater gastropods can reduce the total organic matter content to the water quality standard.
A Review on Ray Capture According to Fishing Gear Worldwide
Authors: Mohidin Nur Arina Hayati , Hajisamae Sukree , Hashim Mazlan , Ali Nik Aziz Nik , Abd Aziz Mohd Fazrul Hisam
Published: April 2021

HighlightRay capture worldwide using variety fishing gear.Efficiency of fishing gear used in capture ray species among countries.The maturation size for female and male ray according to species present.Bycatch issues of elasmobranch in small and large scale fisheries.Suitable fishing gear to capture ray species at particular country.AbstractA coral reef is one of the important ecosystems. However coral Gillnets are usually used as a fishing gear by an artisanal fishery in Malaysia. This gear is commonly used by most countries. This paper discussed the rays capture worldwide by using a variety of fishing gear and also bycatch issues that commonly happen. The efficiency of the fishing gear used in capture ray species is compared and discussed among the countries. This paper distinguishes the maturation size for the female and male ray according to the species presence. The bycatch scenario is also discussed as the majority of this elasmobranch (shark and ray) which is caught as bycatch in both small scale fisheries (gill nets, long lines and hooks) and large scale fisheries (bottom trawl and purse seine). This paper explains the suitable type of fishing gear to use to capture ray species in a particular country.
Heat Flow Transport Model by Gauss-Seidel Type Iteration Methods for Gas and Solid Materials
Authors: Rauf Nurlaela , Haeruddin Heryanto , Rahmat Roni , Tahir Dahlang
Published: April 2021

Technological processes for modification of materials, deposition, and prevented fumes in the pyrolysis processes are used gases materials in the medium with vacuum pressure or atmospheric air pressure. Therefore, it is essential to understand heat flow transport for designing an eﬃcient reactor or find the substrate's excellent position in the reactor or furnace for growing materials. We evaluated the energy transfer phenomena in the form of temperature distribution and heat flow for various heating sources for the gases and solid materials by Gauss-Seidel equation. The thermal conductivity coefficient (k), number of heating sources, and position of heating sources show an essential parameter for transmitting the distribution of the heat. For high k value shows efficiently for heat transfer at low temperature due to the atom's position close each other. The heat also affects to the phonon and lattice vibration like a wave which  successfully shows these phenomena in this study.
Modifikasi Polietilen sebagai komposit Plastik Polimer Biodegradable dengan Filler Tepung Kulit Pisang Talas
Authors: Basuki Rahmat , Haryanti Ninis Hadi , Suryajaya Suryajaya , Husain Sadang
Published: April 2021

Synthetic polymer polyethylene LDPE has been grafted with natural polymers of banana talas (Musa paradisiacal Var sapientum L.) peels flour. The aim of this research is to make compossed plastic of the thermoplastic banana peels flour with LDPE resins plastic based on mechanic and degradation behaviours. Low Density Polyethylene (LDPE) resins, glycerol, banana peels, humus soil, xylene p.a as the raw materials. Thermoplastic banana peels flour produced by added 30% glycerol concentration and then by aging for 2 weeks. The mixing of the thermoplastic banana peels flour with LDPE resins using a ratio of 1:3, 2:3 and 3:3. Xylene (coupling agent) 6 times of the total mass were added to increase compatibility between thermoplastic banana peels flour and LDPE. The mechanical properties of composite were analyzed using ASTM D638 method and the biodegradation capability composite were charactherized using soil burial test method. The results show that tensile strength in the ratio of 1:3, 2:3, 3:3 respectively were 28.94 kg/cm2, 36.16 kg/cm2, 29.94 kg/cm2. The percentage of residual weight show the biodegradation capability in the ratio of 1:3, 2:3, 3:3 was 98.46%, 97.67%, 98.24%. Mixing ratio of 2:3 thermoplastic banana peels flour and LDPE has the best value of tensile strength and degradation capability. Mixing ratio of 2:3 thermoplastic banana peels flour and LDPE has the best value of tensile strength and degradation capability.
ANALISIS KEMAMPUAN BERPIKIR KREATIF SISWA DALAM MENYELESAIKAN SOAL PADA MATERI PEMANASAN GLOBAL BERDASARKAN PRESTASI SISWA
Authors: Yasiro Luluk Rachmatul , Wulandari Fitria Eka , Fahmi Fahmi
Published: April 2021

The ability to think creatively is an ability that students must have to find or create new things that are useful for student in the learning process. Students with high achievement do not necessarily have high creativity either. This study aims to reveal students creative thinking skills in global warming material based on student achievement. This research method uses qualitative methods with a phenomenological approach. The research location was conducted at SMP Negeri 1 Jabon, Dukuh Sari Jabon Sidoarjo. Data collection techniques used are tests dan interviews. The subjects in this study were 3 outstanding students in class VIII with ratings 1-3. The results showed that students in rank 1 were creative, students in rank 2 were quite creative, and students in rank 3 were very creative.Keywords: creative thinking ability, global warming material, achievementAbstrakKemampuan berpikir kreatif merupakan kemampuan yang harus dimiliki oleh siswa untuk menemukan atau menciptakan hal baru yang berguna baginya dalam proses belajar. Siswa dengan prestasi yang tinggi belum tentu memiliki kreatifitas yang tinggi pula. Penelitian ini bertujuan untuk mengungkap kemampuan berpikir kreatif siswa pada materi pemanasan global berdasarkan prestasi siswa. Metode penelitian ini menggunakan metode kualitatif dengan pendekatan fenomenologi. Lokasi penelitian dilaksanakan di SMP Negeri 1 Jabon, Dukuh Sari Jabon Sidoarjo. Teknik pengumpulan data yang digunakan yakni tes dan wawancara. Subjek dalam penelitian ini adalah 3 siswa berprestasi di kelas VIII dengan peringkat 1-3. Hasil penelitian menunjukkan bahwa siswa peringkat 1 kreatif, siswa peringkat 2 cukup kreatif, dan siswa peringkat 3 sangat kreatif.Kata kunci: kemampuan berpikir kreatif, materi pemanasan global, prestasi
PENGEMBANGAN PERANGKAT PEMBELAJARAN IPA MODEL INKUIRI TERBIMBING UNTUK MELATIHKAN KETERAMPILAN BERPIKIR KRITIS
Authors: Maulida Mumtazah , Badruzsaufari Badruzsaufari , Suryajaya Suryajaya
Published: April 2021

The aims of this research is to determine the feasibility of the learning materials of Sciences with guided inquiry model to instruct student’s critical thinking skills. This research and development used Tessmer method to produce a prototype which was tested up to field test. The feasibility of learning materials is expressed by the validity, practicality, and effectivenees. The validity of learning materials is determined by expert and one to one test. The practicality is determined by the implementation of lesson plan (RPP). The effectiveness is determined by the ability of students to implementing LKPD. The result showed that; (1) the learning materials is valid according to the result of evaluation by expert and one to one test, (2) the learning materials is practically according to the result of implementation of lesson plan is 3,5, and (3) the learning matrials is effective according to the result of implementation of LKPD. Based of descriptive analysis it could be concluded that the learning materials developed are feasible and were able to instruct critical thinking skills of junior high school student. Keywords: learning materials, guided inquiry, critical thinking skillsAbstrakPenelitian ini bertujuan untuk mengetahui kelayakan perangkat pembelajaran IPA model inkuiri terbimbing untuk melatihkan keterampilan berpikir kritis peserta didik. Pengembangan perangkat dilakukan berdasarkan model penelitian pengembangan Tessmer sehingga menghasilkan prototype yang diujikan hingga tahap uji lapangan. Kelayakan perangkat pembelajaran dinyatakan dari kevalidan, kepraktisan, dan keefektifan. Kevalidan perangkat pembelajaran ditentukan dari hasil validasi oleh pakar dan hasil uji coba perorangan. Kepraktisan ditentukan dari keterlaksanaan RPP. Keefektifan ditentukan dari kemampuan peserta didik dalam melaksanakan LKPD. Hasil penelitian menunjukkan bahwa; (1) perangkat pembelajaran dinyatakan sangat valid berdasarkan hasil penilaian pakar dan uji perorangan, (2) perangkat pembelajaran dinyatakan praktis berdasarkan hasil penilaian keterlaksanaan RPP mencapai skor 3,5, dan (3) perangkat pembelajaran dinyatakan efektif berdasarkan kemampuan peserta didik melaksanakan LKPD. Berdasarkan hasil analisis deskriptif disimpulkan bahwa perangkat pembelajaran yang dikembangkan dinyatakan layak dan mampu melatihkan keterampilan berpikir kritis peserta didik.Kata kunci: perangkat pembelajaran, inkuiri terbimbing, keterampilan berpikir kritis
PENGEMBANGAN BAHAN AJAR DENGAN MODEL CHILDREN LEARNING IN SCIENCE (CLIS) UNTUK MENINGKATKAN AKTIVITAS DAN KETERAMPILAN PROSES SAINS PESERTA DIDIK
Authors: Hartati Lina , Wati Mustika , Suyidno Suyidno
Published: April 2021

The lack of availability of teaching materials that can foster student activity causes science process skills to be untrained. Therefore, research is aimed at teaching materials with the Children Learning in Science (CLIS) model is feasible to improve the students’ activities and science process skill. This development design uses the ADDIE model. The trial subjects were 30 students of class XI MIPA 3 SMAN 8 Banjarmasin. Data were analyzed quantitatively. Data collectoin was through validation sheets, observation of lesson plans, activity observation and students' science process skills, learning achievement tests. The results showed; (1) the validation results of lesson plan, worksheet, teaching materials, and assessment test were valid, (2) the implementation of lesson plan was very good, (3) the activities and the students’ science process skills in the category are very good. Other than that N-gain of the learning outcomes of 0.62 are in the medium category. It was concluded that teaching material with the CLIS model is feasible to increase the students’ activities and science process skills.Keywords: activities, teaching materials, science process skillsAbstrakMinimnya ketersediaan bahan ajar yang mampu menumbuhkan aktivitas peserta didik menyebabkan keterampilan proses sains belum terlatih. Oleh karena itu, penelitian ini bertujuan menghasilkan bahan ajar dengan model Children Learning in Science (CLIS) yang layak untuk meningkatkan aktivitas dan keterampilan proses sains peserta didik. Desain bahan ajar ini menggunakan model ADDIE. Subjek uji coba ada 30 orang peserta didik kelas XI MIPA 3 SMAN 8 Banjarmasin. Data dianalisis secara kuantitatif. Pengumpulan data melalui lembar validasi pakar, pengamatan pembelajaran, pengamatan aktivitas dan keterampilan proses peserta didik, serta tes hasil belajar. Hasil penelitian menunjukkan; (1) hasil validasi RPP, materi ajar, LKPD, dan tes hasil belajar berkategori valid, (2) keterlaksanaan RPP berkategori sangat baik, (3) aktivitas dan keterampilan proses sains peserta didik berkategori sangat baik. Selain itu, N-gain hasil belajar kognitif sebesar 0,62 berkategori sedang. Diperoleh simpulan bahwa bahan ajar dengan model CLIS adalah layak untuk meningkatkan aktivitas dan keterampilan proses sains peserta didik.Kata kunci: aktivitas, kelayakan bahan ajar, keterampilan proses sains
Analysis of the Factors Affecting the Competitiveness of ASEAN-5 Countries
Authors: Kusnarno Tarwo , Suratman Eddy
Published: April 2021

This study analyzes the factors that affect the competitiveness of ASEAN-5 countries in terms of Labor Productivity, Net Exports, Investment, Inflation and Exchange Rates in two periods, namely the ASEAN internal crisis and the global crisis using the times series data from 1997-2017, then analyzed with the regression analysis model. The results showed that the labor productivity of the 1997-2008 period had a positive and significant effect on the competitiveness of ASEAN-5, as well as the period of 2008-2019, labor productivity had a positive and significant effect on the competitiveness of ASEAN-5. The net export period of 1997-2008 had a negative and not significant effect on the competitiveness of ASEAN-5, as well as the period of 2008-2017, the net export had a negative and not significant effect on the competitiveness of ASEAN-5. The investment period of 1997-2008 has a negative and not significant effect on the competitiveness of ASEAN-5, while the period 2008-2017 has a positive and not significant effect on the competitiveness of ASEAN-5. Inflation in the 1997-2017 period had a negative and insignificant effect on the competitiveness of ASEAN-5, as well as the 2008-2017 inflation period had a negative and not significant effect on the competitiveness of ASEAN-5. Exchange rates for the period 1997-2008 have a negative and insignificant influence on the competitiveness of ASEAN-5, as well as the 2008-2017 period, which has a negative and insignificant effect on the competitiveness of ASEAN-5.
Source of the Hot Universe
Authors: Verozub Leonid
Published: April 2021

It is shown that the gravitational mass-energy defect could be the main cause of Big Bang energy and triggering inflation in the newborn Universe.
Correction of the Koenig Formula for the Kinetic Energy of a Rotating Solid
Authors: Alyushin Yuriy
Published: April 2021

An exact solution is obtained for the kinetic energy in the general case of the spatial motion of solids with arbitrary rotation, which differs from the Koenig formula by three additional terms that take into account the change in the centrifugal moments of inertia when the body rotates. The description of motion in the Lagrange form and the superposition principle are used, which provides a geometric summation of the velocities and accelerations of the joint motions in the Lagrange form for any particle at any time. The integrand function in the equation for kinetic energy is represented as the sum of the identical velocity components of the joint plane-parallel motions. In the general case of motion with 6 degrees of freedom, the energy of rotational motion is determined by three axial moments of inertia, as in the Koenig formula, and three additional centrifugal moments, which take into account the rotation of the body. They can be calculated through 6 integral characteristics of the density distribution, determined for the initial position of the body.
Semi-Supervised Learning in Medical Image Segmentation: Brain Tissue with White Matter Hyperintensity Segmentation Using FLAIR Image
Authors: Rieu ZunHyan , Kim Donghyeon , Kim JeeYoung , Kim Regina EY , Lee Minho , Lee Min Kyoung , Oh Se Won , Wang Sheng-Min , Kim Nak-Young , Kang Dong Woo , Lim Hyun Kook
Published: April 2021

White matter hyperintensity (WMH) has been considered the primary biomarker from small-vessel cerebrovascular disease to Alzheimer’s disease (AD) and has been reported for its correlation of brain structural changes. To perform WMH related analysis with brain structure, both T1-weighted (T1w) and (Fluid Attenuated Inversion Recovery(FLAIR) are required. However, in a clinical situation, it is limited to obtain 3D T1w and FLAIR images simultaneously. Also, the most of brain segmentation technique supports 3D T1w only. Therefore, we introduced the semi-supervised learning method that can perform brain segmentation using FLAIR image only. Our method achieved a dice overlap score of 0.86 for brain tissue segmentation on FLAIR, with the relative volume difference between T1w and FLAIR segmentation under 4.8%, which is just as reliable as the segmentation done by its paired T1w image. We believe our semi-supervised learning method has a great potential to be used to other MRI sequences and provide encouragement to people who seek brain tissue segmentation from a non-T1w image.