bluuebunny/crossref_metadata_2025 huggingface dataset:
A guide to the application of lithostratigraphic terminology in Precambrian terrains
Authors: Easton R. M.
Published: December 2023

Although Precambrian rocks represent 75% of the exposed surface area of the planet, the application of stratigraphic nomenclature to Precambrian rocks units lags far behind that of younger rocks, even though it has been 25 years since the 1983 NorthAmerican Stratigraphic Code introduced the concept of lithodemic units which were designed specifically for stratigraphic analysis of intrusive and metamorphic rock bodies. This paper is a primer for the application of lithostratigraphic (sensu lato) nomenclature for Precambrian rocks, illustrated with examples from the literature. Examples of formal stratigraphic units include Formation, Group and Supergroup (lithostratigraphic units, sensu stricto), which can be applied to rocks of low-metamorphic-gradewhere the law of superposition applies; and Lithodeme, Suite, Supersuite, Complex and Structural Complex, which can be applied to low- to high-metamorphic- grade intrusive and/or metamorphic rocks where the law of superposition cannot be demonstrated. Examples of informal stratigraphic units can include all of the previous units where they are not formally defined, as well as units such as gneiss associations and tectonic assemblages. With the availability of this wide range of tools, there is no reason why Precambrian stratigraphic nomenclature cannot become both more widespread and formalized, regardless of the degree of metamorphism and deformation.
Do GSSPs render dual time-rock/time classification and nomenclature redundant?
Authors: Ferrusquia-Villafranca Ismael
Published: December 2023

The Geological Society of London Proposal for "...ending the distinction between the dual stratigraphic terminology of time-rock units (of chronostratigraphy) and geologic time units (of geochronology). The long held, but widely misunderstood distinction between these two essentially parallel time scales has been rendered unnecessary by the adoption of the global stratotype sections and points (GSSP-golden spike) principle in defining intervals of geologic time within rock strata." Our review of stratigraphic principles, concepts, models and paradigms through history clearly shows that the GSL Proposal is flawed and if adopted will be of disservice to the stratigraphic community. We recommend the continued use of the dual stratigraphic terminology of chronostratigraphy and geochronology for the following reasons: (1) time-rock (chronostratigraphic) and geologic time (geochronologic) units are conceptually different; (2) the subtended time-rock's unit space between its "golden spiked-marked" lower and upper boundaries, actually corresponds to the duration of the time-rock unit's defining geologic s.l. events-set; therefore, in no way can physical time (instants or intervals) be directly defined by GSSPs, (3) combining in a single system of "chronostratigraphic units" the time-rock and geologic time units as currently understood, leads to the epistemological error of uniting evidence (rock successions) with inference (the interpreted duration of chosen defining events); (4) the redundancy of the terms eonothem, erathem, system, series, and stage with eon, era, period, epoch and age lacks support, given that they are conceptually different; in fact, referring to "eon," "era," etc. as terms uniting both time-rock and geochronologic connotations will produce needless nomenclatorial confusion, attaching different meanings to already well known and widely used geologic terms; and (5) the reversion of 'geochronology' to its main stream and original meaning of numerical dating has no foundation, just by considering that the use of geochronolgy precedes numerical dating, which became practical by the 1960's. We endorse the following: (1) the GSSP network needs to be improved through the use of reference sections at high latitude sites, and in sedimentary continental rock successions of achievable, dependable positioning in the global standard timetable; and (2) to attend to researchers using astronomically-forced sedimentary systems, the designation of unit stratotypes needs to be reinstated as a valid and as a, complementary means of defining chronostratigraphic units, particularly at the stage and lower chronostratigraphic rank.
Cooling upwelling regions along the California margin during the early Pliocene: evidence for a shoaling thermocline
Authors: Reed-Sterrett Chelsea , Dekens Petra S. , White Lisa D. , Aiello Ivano W.
Published: December 2023

The early Pliocene is the most recent time in Earth history when average global temperatures were warmer than they are today. Previous work has shown that coastal upwelling regions had a particularly strong response to early Pliocene warmth, with sea surface temperature records in the southern California margin indicating SST was 9-10°C warmer compared to today. Warmer SST in upwelling regions could have been an important factor in maintaining Pliocene warmth. However, the cause for the warmer conditions in upwelling regions and the transition to colder SST has remained elusive. We present alkenone derived SST estimates from a northern California margin location, ODP Site 1022 (40°N, 125°W, 1950m water depth), from the early Pliocene (4. 2-2.8 Ma). The 2.8°C cooling during this time interval is similar to that observed at two southern California margin sites (ODP Sites 1014 and 1012), indicating the three sites were responding to the same forcing. However, SST was only 3°C warmer than today at ODP Site1022 while the southern sites were 9-10°C warmer than today, thereby increasing the latitudinal temperature gradient along the California margin dramatically during the early Pliocene compared to today. This indicates that the tropical warm pool expansion during the early Pliocene was not felt along the Northern California margin. We quantified diatom assemblages at ODP Site 1022 to constrain changes in oceanographic conditions during early to middle Pliocene. The percent of diatoms indicative of subarctic waters is unchanged from 4.2 to 3 Ma, suggesting that a change in the strength of the California current cannot explain the cooling SST trend. We also found no trend in the percent of upwelling-indicative diatoms, which is consistent with records of alkenone mass accumulation rate, diatom preservation, biosilica, and total organic carbon, none of which show evidence that the upwelling of nutrient-rich subsurface water increased as SST cooled. The fact that upwelling of nutrient-rich water was occurring even when SST were warmer can be explained by a deeper early Pliocene thermocline.
Study of fatigue characteristics of key welds of modular drilling derricks
Authors: Zhang Zhe , Tian Jialin , Liu Chenghang , Xiong Changqing
Published: December 2023

Driven by the gradual development of oil and natural gas resources, the global use of rigs  and the number of wells rise steadily. Modular rigs play an important role in oil exploration because of their efficient transport, economy, technological advancement, and rig reliability. The derrick is a key part of the modular rig, and since many essential components in the derrick are welded, the fatigue life of the derrick weld is particularly relevant. In this paper, the modular rig is the object of the research, proposing the calculation formula of fatigue life of the key weld of the derrick. Using modular rig ZJ90D as an example, and combining the rig working conditions with the structural characteristics of the derrick, the key calculation parameters are obtained by numerical analysis. Thus, the life expectancy of the key weld is calculated according to the calculation formula of fatigue life presented herein. The research results have important reference significance and guiding value for the design and optimization of modular rig derricks.
RECTORII UNIVERSITĂȚII DIN CLUJ (1872-1919) – A KOLOZSVÁRI TUDOMÁNYEGYETEM REKTORAI (1872-1919).
Authors: Osváth Zsolt
Published: December 2023

The publication covers the work of rectors of the University of Kolozsvár between 1872 and 1919. Editors: Miklós Róbert and Szabolcs Tóth.
NAGY-AJTAI FEKETE LAJOS M. KIR. MINISZTERI TANÁCSOS, ERDŐAKADÉMIAI TANÁR, A M. KIR. BÁNYÁSZATI ÉS ERDÉSZETI AKADÉMIA IGAZGATÓJA 1837–1916
Authors: Bende Attila , Bartha Dénes
Published: December 2023

Lajos Fekete, Hungarian Royal Minister Counsellor, Forestry Academy professor is a leading figure in higher forestry education, who achieved indefeasible results in creating Hungarian language education and the Hungarian forestry language. Between 1872 and 1891, he headed the Department of Phytology and Silviculture at the Royal Hungarian Academy of Mining and Forestry in Selmecbánya, and from 1891 until his retirement he headed the Department of Forest Management. He played an important role in the organisation of the Academy campus, the construction of new educational buildings and the development and furnishing of the botanical gardens, as well as in the compilation and development of collections related to the subjects he taught (zoology, entomology, botany, climatology and soil science). Hungarian experiments in forestry began to take institutional form in 1897/98, and Lajos Fekete was responsible for this, as well as for the idea of establishing forestry education on a secondary level. Although he had already exceeded the possible age of retirement in 1894, his tireless work ethic kept him in the Academy. He enjoyed the confidence of the Academy's teaching staff and served as vice-principal in the academic year 1892/93, then as director in the academic years 1897/98, 1898/1899 and 1899/1900, and was also head of the forestry department. At the age of 69, on 1 October 1906, he was retired at his own request, because of his failing eyesight towards the end of his life. Thus, the last serving teacher of the first faculty of the Forestry Academy left the academy chair. On this occasion, he was awarded the title of Minister Counsellor in recognition of his services. In 1910, six years before his death, he received the highest recognition for his work, being accepted as a corresponding member of the Hungarian Academy of Sciences. There is no branch of forestry science in which his work has not left a lasting mark. Despite this extremely productive and diversified career, which produced outstanding achievements in all fields, posterity has treated and still treats Lajos Fekete, whose work and human behaviour can stand as an example to us all, rather cruel.
100 ÉVES A DEBRECENI EGYETEM BŐRGYÓGYÁSZATI KLINIKÁJA
Authors: Szegedi Andrea
Published: December 2023

The Department of Dermatology at the University of Debrecen celebrated its 100th anniversary in 2021. However, the year 2021 did not allow us celebrate this important anniversary properly, due to the COVID pandemic, so the festive meeting in honor of the Centenary and this commemorative article were organized and completed in the spring of 2023. History of the past 100 years of the Department of Dermatology is presented reviewing the main developmental steps in patient care, education, and research, remembering the legacy of our former colleagues and directors, furthermore to provide an opportunity to all employees of the University and independent readers to gain insights into this interesting, more than hundred years’ medical history of dermatology in Debrecen.
EGYETEMI KIADÓK MA ÉS TEGNAP
Authors: Soós Erika Mária
Published: December 2023

The regime change brought about significant changes in the field of book publishing, particularly in the publishing of textbooks and lecture notes. However, even from the 1990s, it is still not easy to find readily available statistical data on the emerging university publishers, their activities, and operations. The work in this direction at domestic universities is far from uniform, both in terms of organization and economic structure, as well as the completed task groups. In this study, I present the environment influencing the currently operating university publishing workshops and publishers, and begin to take stock of them, while also providing a detailed introduction to the Debrecen University Press.
Honey Plants of Düzce University Ornamental and Medicinal Plants Botanical Garden
Authors: AKSOY Necmi , MÜDERRİSOĞLU Haldun , EROĞLU Engin , GÜNEŞ ÖZKAN Neval , BİRTÜRK Turgay , KOÇER Nihan , TUNÇKOL Bilge , YERLI Ozgur , KULAÇ Şemsettin , ÇETİN Bilal , SARGINCI Murat , KAYA Sertaç , ASLAN Serdar , KANOĞLU Salih Sercan , BAŞARAN Nermin , DOĞAN Tuba Gül , AYTEĞİN Ahmet
Published: December 2023

In this study, melliferous plants that the honey bee (Apis mellifera L.) can benefit from among the taxa planted in Düzce University Ornamental and Medicinal Plants Botanical Garden, are presented. Among the 451 taxa planted in the botanical garden, those with these characteristics were determined by reviewing studies on the subject. Of the 165 taxa (36.58%) included in the honey plant class; 119 contain both nectar and pollen, 25 contain pollen, 13 contain nectar, 4 contain both pollen and insect secretion (IS) or sweet sap (SS), 2 contain pollen, nectar and IS or SS, 1 contain both nectar and SS, 1 contain only IS. In order to prevent the decrease in pollinator and pollinator insects, whose numbers are decreasing due to global climate change, a "Bee and Insect Hotel" was placed in the botanical garden. For this reason, the majority of the plants selected for planting were chosen from taxa with honey plant properties. The main purpose here is both to pollinate the plants in the botanical garden and to show and explain the effects of insect species on pollination through nature education.
Comparison of Payback Periods of Solar Power Plant in Türkiye and Europe
Authors: GYAM Mohannad , CEYLAN İlhan , GÜREL Ali Etem , YILDIZ Gökhan
Published: December 2023

The importance of energy in the world is increasing day by day. Most of the countries’ energy needs are met by fossil fuels. Due to the depletion of fossil fuels, their increasing prices and the damage they cause to the environment, researchers have turned to alternative energy sources. The demand for renewable energy sources as alternative energy has increased significantly in recent years. Solar energy is one of the most popular and widely used energy sources among renewable energy sources all over the world. For this reason, efforts are being made to increase the use of solar energy in Türkiye and European countries. Although the amount of solar radiation in Türkiye is high, it has not reached the expected levels. In this study, the payback periods (PBP) of a 1 MW solar power plant (SPP) connected to the grid between Türkiye and European countries were compared. It is assumed that the compared countries use monocrystalline solar panels with an efficiency of 22.6% at their specific solar radiation values. Additionally, due to the impact of the Russia-Ukraine war on energy prices, the PBP of the SPP was determined based on two scenarios. According to the results, in the first scenario, the highest PBP is in Karaman with 2.75 years, followed by Türkiye with 3.17 years. PBPs in Spain, France and Germany are calculated as 3.6, 5.6 and 5.7 years, respectively. In second scenario (after the Russia-Ukraine war), the highest PBPs were determined as Germany with 2.22 years and France with 3.27 years. PBPs in Spain, Karaman and Türkiye were determined as 2.41, 2.75 and 3.17 years,
respectively.
Determination of Modified Mohr-Coulomb Damage Model Parameters for DH780 Steel in Finite Element Analysis
Authors: CİVEK Tolgahan , ŞEN Nuri , ELKOCA Oktay
Published: December 2023

In sheet metal forming processes, tearing problems might be occasionally encountered due to many reasons such as incorrect forming parameters. The trial and error methods that are used to solve such problems, on many occasions, are time-consuming and inefficient in terms of finding the correct forming parameters or die design for the forming process. The finite element analysis method, on the other hand, can be used as a tool that is both time and cost-saving. However, in order to effectively exploit the use of finite element analysis in sheet metal forming operations, the material that is used to be formed needs to be well characterized in terms of its hardening behaviour and failure criteria. In this study, a TRIP-aided DP steel (DH780) has been tensile tested in three different deformation conditions (uniaxial, plane stress and shear) and the parameters of its hardening model (Hollomon) and failure criteria (Modified Mohr-Coulomb) have been determined. According to the simulation results, obtained hardening parameters are able to describe the flow behaviour of the steel and the used failure criterion is able to predict the experimental failure correctly in each deformation condition.
Deanship at Chinese Universities: A Thematic Literature Review
Authors: Lui Peng , Ruan Nian
Published: December 2023

Deanship, the critical middle level of leadership in higher education, has been a relatively under-studied area in the Chinese context. Academic deans play significant roles in higher education, as they connect university leaders, administrative staff, faculty members, students, and the public. With the changing environment within and outside higher education, academic deans are encountering increasing role conflicts and challenges. Most of the literature discussing deanship has been concerned deans in Western societies such as the United States, the United Kingdom, Australia, and some countries in Europe. In China, deans’ leadership is situated in a different cultural and political discourse in higher education institutions, as they interact with academic, administrative, and political leadership. This study aims to investigate the status quo of the literature on deanship in Chinese universities, identify knowledge gaps, compare the Chinese literature with the existing literature in the West, and suggest future research directions. This article uses a narrative review method to examine the literature about deanship and to extract major themes in the field: roles and performance, challenges, effectiveness, and leadership development. Using these themes, it explores the literature on academic deans’ leadership in universities in China. The study found that the qualities necessary for deanship in Chinese universities emphasize deans’, communication competence, capacity to balance academic and administrative roles and ability to deal with faculty members and university leaders under the Communist Party’s leadership. Chinese academic deans have comparatively more constraints on their capacity to set goals and create vision in their faculties. They also face similar challenges to their counterparts in the West: role conflicts as scholars and academic managers, ambiguous expectations, and work stress. Suggestions and strategies for improving deans’ leadership at Chinese universities are also put forward.
impactos da pandemia e do ensino remoto no aprendizado de estudantes de Medicina
Authors: Aparecida Ribeiro Loureiro Amanda , Aparecida Fófano Gisele
Published: December 2023

Em janeiro de 2020, foi declarada pela Organização Mundial de Saúde (OMS) uma pandemia devido àCOVID-19. Por consequência, houve a necessidade da adoção abrupta e compulsória do isolamento social e da transição do ensino presencial para o ensino remoto. Ao curso de Medicina, a modalidade remota foi autorizada pelo Ministério da Educação e Cultura (MEC) para disciplinas teórico-cognitivas, sendo as atividades práticas vetadas. Identificar os impactos da pandemia e do ensino remoto no aprendizado de estudantes de Medicina. Trata-se de um estudo transversal e descritivo, de abordagem quali-quantitativa, feito com base em dados coletados por meio da aplicação de um questionário a 145 alunos do 3o ao 8o período do curso de Medicina de um centro universitário privado em Minas Gerais. Os estudantes de Medicina passaram por uma queda acentuada no seu rendimento acadêmico e no aprendizado, teórico e prático, durante a pandemia, além do destaque para o surgimento de sintomas de ansiedade e depressão. O ensino remoto funcionou de forma complementar, sendo útil à continuidade dos estudos no período pandêmico.
Níveis plasmáticos de adiponectina e sua relação com obesidade e comorbidades:
Authors: Everton de Freitas André , Marcolino Costa Mariana , Eduardo Queiroz Warlen , Pereira Fonseca Raquel , Alves Lamounier Joel
Published: December 2023

O tecido adiposo é um órgão endócrino capaz de secretar diversas substâncias bioativas. Dentre as proteínas secretadas pelos adipócitos, a adiponectina é a mais abundante, apresentando ações fisiológicas importantes. Esta revisão teve como objetivo descrever o mecanismo de ação dessa proteína no organismo e as comorbidades associadas aos baixos níveis plasmáticos. Para realizar as buscas na literatura, foram consultadas quatro bases de dados: PubMed, Scielo, Biblioteca Virtual em Saúde (BVS) e Medline, abrangendo os anos de 2006 a 2023. A redução da adiponectina, observada nos indivíduos obesos, impacta na suscetibilidade ao desenvolvimento de diversas comorbidades. Além disso, por ser um hormônio protetor, seria interessante incluir tais exames para acompanhamento e diagnostico de sobrepeso e obesidade.
Manual para o monitoramento de Biodiversidade por meio de DNA ambiental (eDNA metabarcoding)
Authors: Olivieira Renato , Martins Vitória , Costa Paulo , Mendes Izabela , Barreto Silvia , Bitencourt José , Vasconcelos Júnior Santelmo , Nunes Gisele , Oliveira Guilherme , Aleixo Alexandre
Published: December 2023

O Brasil, reconhecido por sua rica biodiversidade, enfrenta desafios significativos para mapear e conservar sua vasta fauna e flora, devido à grandeza e diversidade de seu território. A escassez de taxonomistas agrava a situação, tornando os levantamentos de biodiversidade mais raros e custosos. Nesse contexto, o DNA metabarcoding surge como uma solução inovadora, permitindo a identificação simultânea de múltiplas espécies através da análise do DNA ambiental encontrado em amostras de solo, água, sedimentos e/ou tecidos biológicos. A eficiência da técnica se depende de bancos de dados de códigos de barra de DNA, gerados a partir do sequenciamento de marcadores moleculares específicos de espécimes previamente identificados por especialistas, garantindo assim a confiabilidade dos resultados. Esta abordagem vem revolucionando os projetos de monitoramento ambiental e conservação da biodiversidade, oferecendo resultados rápidos e precisos. Além disso, a técnica tem se mostrado essencial para estratégias de manejo eficazes e para atender a diversos propósitos regulatórios e de preservação. Este manual integra métodos de monitoramento de flora e ictiofauna, propondo-se a exemplificar a aplicação prática da técnica de DNA metabarcoding, visando sua adoção no Projeto Genômica da Biodiversidade Brasileira (GBB). A iniciativa representa um passo crucial para gerar conhecimento aprofundado da biodiversidade brasileira, essencial para minimizar impactos ambientais e orientar esforços de conservação.
Indigenous Knowledge in Reducing HCN Content in the Processing of Gadung Tubers (Dioscorea hispida) as Student Teaching Materials
Authors: Rahmawati Fitri , Ashari Ari , Zulhariadi Muhammad
Published: December 2023

The research aims to understand the indigenous knowledge of the community in processing gadung tubers (Discorea hispida) and to identify the most effective variations in reducing HCN content for educational purposes, specifically in the form of an Environmental Knowledge Module for students in the Biology Education program at FKIP Cordova University. The research methodology involves an experimental approach with four core stages: conducting surveys and interviews with the community in Beru Village, Jereweh District, West Sumbawa Regency; developing observation sheets for gadung tuber processing based on local knowledge; and engaging in practical activities with the research team, the community, and two biology education students. The research results, based on the module validation, show an average score of 77.5%, categorizing it as good. The conclusion of the study is that the most effective variation in reducing HCN content involves the addition of 300 grams of salt compared to other variations, along with the inclusion of squeezed castor leaves juice. The practical activities conducted in accordance with the local knowledge of Beru Village community in Jereweh District have progressed well, producing gadung sticks as safe-to-consume food products.
Development of Basic Electronics E-Modules Integrated with Problem Solving Models to Improve Students’ Mastery of Concepts and Creative Thinking
Authors: Triani Frima , Asrizal Asrizal
Published: December 2023

In the 21st century, the Indonesian nation faces many global challenges. These demands include students having to have verbal and written communication skills, teamwork, creativity, research and problem solving skills to be able to compete in the future. To emphasize understanding and develop creative thinking, students need to be facilitated with tools that support learning. One of them is e-module. This research aims to determine the validity of basic electronics e-modules which are integrated with problem solving models to improve students' mastery of concepts and creative thinking. This research is Research and Development (R&D). Development is carried out by referring to the ADDIE model. The instrument used in this research is a basic electronics e-module validation sheet. The validity become evaluated the use of Aiken's V scale. Based on the results of basic electronics e-module validation data analysis, the average e-module validation value was 0.87. It can be concluded that the basic electronics e-module which is integrated with a problem solving model to improve students' mastery of concepts and creative thinking is declared valid and suitable for use
Development of Electronic Student Worksheets Using Nearpod and the RADEC Learning Model in Social Science Subjects in Elementary Schools
Authors: Syahrir Didi , Ahmad Syafri , Miaz Yalvema , Al Kadri Hanif
Published: December 2023

The fact that LKPD is still presented to students at school in the form of handouts printed by teachers is the inspiration for this research. The aim of this research is to create an E-LKPD product using the Nearpod application built on the RADEC platform. Development research using the ADDIE development model is this type of research. Research tools include questionnaires, tests, interviews, and documentation. The results of the elementary school level E-LKPD supported by the RADEC-based Nearpod application are classified as very valid. In the very practical field on the practicality questionnaire, both teacher response scores and student scores are very practical. The N-Gain score % test is applied to the efficacy category. So the resulting E-LKPD can be said to meet the criteria of being correct, useful and effective in improving student learning outcomes. The percentage test of the N-Gain score in the effective category is used to measure effectiveness. Therefore, it can be said that the E-LKPD implemented has fulfilled all valid, practical and effective criteria for improving student learning outcomes in science and science subjects using the Nearpod application based on radec as well as interest and enthusiasm for learning
Effectiveness of Dry Lab Based Augmented Reality to Overcome the Misconceptions of Students on Solar System and Eclipse Learning Topics
Authors: Akhsan Hamdi , Yusup Muhammad , Ariska Melly , Husna Tsabita , Sari Dwita Kartika
Published: December 2023

In science learning there are many important concepts that must be understood. The solar system is a complex and abstract material because it cannot be seen directly by human senses resulting in students experiencing misconceptions.  Interactive learning media is needed to help students understand concepts. One of the learning media that can be applied is augmented reality based on dry lab simulation. This study aims to determine the effectiveness of using Dry Lab simulation to overcome misconceptions of earth and solar system material in junior high school. This research uses experimental research methods with Pre-experimental research models. The overall research results, the average effectiveness was 45.16%, which showed less effective results. Partially for the two sub-concepts of planets and solar and lunar eclipses, the average effectiveness is 65.5%, which shows that the dry lab simulation is effective in changing students' misconceptions
Pengaruh Biochar Terhadap Mobilitas Merkuri (Hg) Pada Percobaan Pencucian (Leaching) Tertutup
Authors: Mahardhika Baiq Eliza Prizma , Sukartono Sukartono , Kusnarta I Gusti Made , Suwardji Suwardji , Fahrudin Fahrudin
Published: December 2023

This study aims to determine the effect of biochar application on Hg mobility in a closed leaching experiment using gold processing tailings contaminated soil. The factorial experiment was set up using a Completely Randomized Design (RBD) which tested three types of biochar (rice husk biochar, coconut shell, and corncob biochar) and three doses of biochar (0.10 tons ha-1 and 15 tons ha-1). The PVC column containing a mixture of polluted soil and dibiochar was washed four times with deionized water for a total of 1090 ml of watering. The results showed that the application of biochar can reduce the mobility of mercury (Hg) in small scale gold processing tailings polluted soils. The dissolved Hg concentration in the leachate decreased with increasing dose of biochar application. Leachate from corn cob biochar (15 tons ha-1) treatment showed the lowest Hg concentration of 0.0012 ppm but was not significantly different from leachate from the soil column that was applied coconut shell and rice husk biochar. The concentration of Hg in the leachate for all biochar treatments ranged from 0.0012 - 0.0062 ppm, significantly different from the leachate concentration of the soil column without biochar, which was 1.62 ppm. This provides an indication that biochar can reduce the leaching rate, so that the concentration of Hg is not much leached into the soil. Therefore, biochar can be used as a soil enhancer in remediation of mercury (Hg) polluted soil so that it can slow down the mobility of mercury (Hg) so that it has a small impact on the environment.
Pemanfaatan Biochar dan Respon Pertumbuhan Tanaman Sawi Hijau (Brasicca juncea L) pada Tanah Tercemar Merkuri (Hg)
Authors: Rohmaniati Baiq Siti , Sukartono Sukartono , Fahrudin Fahrudin , Kusnarta I Gusti Made , Susilowati Lolita Endang
Published: December 2023

This study aims to determine the potential of biochar on the mobility of mercury (Hg) in polluted soil planted with mustard greens (Brasicca juncea) and to determine the growth response of mustard greens (Brasicca juncea) in absorbing mercury (Hg). This study used the experimental method, which is a method that aims to examine the effect of biochar application at various doses on the mobility of mercury using the indicator plant mustard greens (Brasicca juncea L) in mercury (Hg) polluted soil. This experiment was carried out from March to June 2023 in the Greenhouse of the Faculty of Agriculture, University of Mataram. Soil samples were collected in Pelangan Village, Sekotong District, West Lombok Regency at several points near the gold processing unit. The samples were taken at top soil of 30 cm with a distance of 100 cm from the processing site then composited. Soilschemical properties including concentration of Hg before and after experiments were measured. Agronomic variables include fresh and dry weight of roots, total dry weight of and concentration of Hg) in plant tissue were also measured. The results of the study showed that the application of rice biochar reduced mobility of Hg in soils. The concentration of extractable-Hg in biochar-treated soils were lower compared to control. This is likely related to the potential adsorption of a number of IHg and MeHg by the negative surface of the biochar and also the formation of association of Hg bonds with the functional groups of the biochar. However, this needs further confirmation.
Komparasi Metode Titrimetri Dengan Spektrofotometri UV-Vis pada Analisis Chemical Oxygen Demand (COD) Output IPAL Domestik Berdasarkan Linieritas, Akurasi dan Presisi
Authors: Lestari Ida , Pujiastuti Peni , Wibowo Yari Mukti
Published: December 2023

The method of a test must be evaluated and tested to ensure that the method is capable of producing valid data. So that validation needs to be done as a quality control that provides assurance that the measurements and results obtained are reliable. This study aims to determine the value and comparison of the values of linearity, accuracy, and precision of the titrimetric and spectrophotometric methods in COD analysis. Determination of the COD value for the titrimetric method was carried out by redox titration using a solution of Ferro Ammonium Sulphate (FAS). While the spectrophotometric method was carried out using UV-Vis spectrophotometry at a wavelength of 420 nm. The research results obtained a linear regression value for the titrimetric method of 0.9989, while the spectrophotometric method was 0.9991, this indicates that the linear regression value of the spectrophotometric method is better than the titrimetric method. The results of the accuracy analysis for the titrimetric method obtained a value of 111.48%, while for the spectrophotometric method it was 103.11%, this shows that the accuracy value of the spectrophotometric method is better than the titrimetric method. The precision analysis results for the titrimetric method obtained a value of 1.77%, while for the spectrophotometric method it was 1.55%, this shows that the spectrophotometric method has a better precision value than the titrimetric method. Based on the comparison of the results of statistical validation using the T-test, there was no significant difference in data between the titrimetric method and the spectrophotometric method.
Implementasi Game Math Puzzle sebagai Media Pembelajaran Numerasi Siswa SDN 02 Badrain
Authors: Nurhadiani Rina , Alifa Siti , Aisy Rihadatul , Satira Satira , Katrunada Saskia , Humaela Rizka Siti , Chandra Dewi Alfiana , Dwi Astuti Silvia
Published: December 2023

School with relatively low literacy and numeracy skills are an indicator of where campus teaching programs are held. Therefore, students from the Faculty of Teacher Training and Education at the University of Mataram who were registered as campus teaching participants for grade 6th placement at SDN 02 Badrain created the "Math Puzzle Game" program. The aim of this program is to improve students' numeracy skills through the application of math puzzle games which are expected to be a fun learning medium as well as improving problem solving skills, sharpening logical skills, strengthening number understanding abilities, and encouraging teamwork. The target of this program is students in grades 4, 5, and 6. The method for implementing the "math puzzle game" program uses several stages, namely preparation, implementation, and evaluation or improvement. The results of applying the math puzzle game are that students have the ability to think quickly and critically when solving puzzles, students understand basic mathematical concepts, and students succeed in applying their understanding of the relationship between numbers and solving mathematical problems correctly. It is hoped that this service can be continued and carried out more optimally in the future learning process. Seeing the aim of service through this program is very important as an effort to improve students' numeracy skills.
Success, Survival and Prognostic Factors in Implant Prosthesis: Experimental Study
Authors: Epifania Ettore , Pietrantonio Maria , Christian Nunziata , Ausiello Pietro
Published: December 2023

The primary objective of this study was to detect the success and short-term survival rate of dental implant prosthetic therapy. The valuation of a possible relationship between the general and local clinical conditions of the patients (presence of risk factors and type of dental implant-supported prosthesis) and the satisfaction perceived by the patient, with success and survival of implant devices was investigated. The sample trial consisted of 23 patients, for a total of 50 dental implants supporting a prosthetic therapy. Preliminarily, an analysis of averages and frequencies of the anamnestic data was presented, as numbers and percentages. The implant success rate was calculated by assessing whether the implants fulfilled the success criteria defined by the Pisa Consensus Conference. The ANOVA test was used to check whether there was an association between the success of the implant device, the anamnestic data collected, and the type of prosthesis supported by the implants. Finally, the survival rate was calculated using the Kaplan - Meier method. The 2-year success rate of 50 implants was assessed at 98%. The 2-year survival rate was 97%. Finally, sex, age, compensated diabetes, a smaller and equal number of cigarettes per day (10 per day), the BOP, and the type of titanium dental implants supported by prosthesis, do not determine a change in success and are therefore not adequate parameters to predict the outcome of implant success. Following the results obtained, it is appropriate to continue the research by expanding the clinical observation times in order to obtain more solid scientific and clinical evidence.
Art and design entanglements for renewable energy education: Renewable energy art and design approach
Authors: Soares Paulo Henrique , Kang Mihyun , Choo Phil
Published: December 2023

The ongoing energy transition presents a necessary shift towards renewable sources, such as wind and solar power, in the face of the challenges presented by the changing climates. This change, however, requires an understanding of the operation of renewable energy systems. In other words, the shift towards clean energy generation demands education. By combining art, design, and renewable energy education the renewable energy art and design (READ) approach provides a path for renewable energy education. READ approach is a customizable and flexible process developed to enable the creation of solar-powered devices while sharing knowledge on diverse subjects such as art, design, electronics, electricity, and computer science. Due to its versatility, READ is expected to enhance energy education and contribute to the transition towards a renewable-powered society.
DECODING DIGITAL LEARNING: A CART ANALYSIS INSIGHT
Authors: Harini Sri , Mulyanto Angga Dwi , Rozi Fachrur
Published: December 2023

In today's digital era, online education has become an integral component of the global educational system. However, the quality of providers, mastery of online learning media, and the capability of teachers in delivering content significantly influence students' comprehension. Understanding how these factors impact students is crucial for optimizing online educational experiences. This article examines the effect of provider quality, mastery of online learning media, and teacher's capability in teaching on students' understanding in an online learning environment using Classification and Regression Trees (CART). The study focused on the active students of UIN Maulana Malik Ibrahim Malang, totaling 18,104 based on data from PDDIKTI. Due to the vastness of this population, stratified random sampling was employed. The sample size was determined using the Kock and Hadaya method, resulting in a minimum sample of 271. Each sample in the stratum was taken based on the proportion of the population across 19 departments, with the Department of Psychology having the largest sample size of 20 students and the Department of Library and Information Science the smallest with 4 students. The findings revealed that a teacher's capability has a more profound influence on students' understanding than mastery of online learning media, while provider quality showed no significant impact. To enhance the effectiveness of online learning, it's recommended that educational institutions invest in teacher training focused on effective teaching methodologies and technological utilization, and also ensure the selection of online learning platforms that cater to student needs.
EDGE IRREGULAR REFLEXIVE LABELING ON ALTERNATE TRIANGULAR SNAKE AND DOUBLE ALTERNATE QUADRILATERAL SNAKE
Authors: Zalzabila Lutfiah Alifia , Indriati Diari , Martini Titin Sri
Published: December 2023

Let G in this paper be a connected and simple graph with set V(G) which is called a vertex and E(G) which is called an edge. The edge irregular reflexive k-labeling f on G consist of integers {1,2,3,...,k_e} as edge labels and even integers {0,2,4,...,2k_v} as the label of vertices, k=max{k_e,2k_v}, all edge weights are different. The weight of an edge xy in G represented by wt(xy) is defined as wt(xy)= f (x)+ f (xy)+ f (y). The smallest k of graph G has an edge irregular reflexive k-labeling is called the reflexive edge strength, symbolized by res (G). In article, we discuss about edge irregular reflexive k-labeling of alternate triangular snake A(T_n ) and the double alternate quadrilateral snake DA(Q_n ). In this paper, the res of alternate triangular snake A(T_n ) , n≥3 has been obtained. That is ⌈(2n-1)/3⌉ for n even,2n-1≢2,3 (mod 6),⌈(2n-1)/3⌉+1 for n even,2n-1=2,3 (mod 6),⌈(2n-2)/3⌉ for n odd,2n-2≢2,3 (mod 6), and ⌈(2n-2)/3⌉+1 for n odd,2n-2=2,3 (mod 6). Then, the reflexive edge strength of double alternate quadrilateral snake DA (Q_n) ⌈ (4n-1 )/3⌉for n even, 4n - 1 ≠2,3 (mod 6), ⌈ (4n-1 )/3⌉+1 for n even, 4n - 1 = 2,3 (mod 6), ⌈ (4n-4)/3⌉ for n odd, 4n - 4 ≠2,3 (mod 6), and ⌈ (4n-4 )/3⌉+1 for n odd, 4n - 4 = 2,3 (mod 6).
ON THE COMMUTATION MATRIX
Authors: Yanita Yanita , Yulianti Lyra
Published: December 2023

The commutation matrix is a matrix that transforms any vec matrix , to vec transpose . In this article, three definitions of the commutation matrix are presented in different ways. It is shown that these three definitions are equivalent.  Proof of the equivalent uses the properties in the Kronecker product on the matrix.  We also gave the example of the commutation matrix using three ways as Moreover, in this study, we investigate the  properties of the commutation matrix related to its transpose and the relation between the vec matrix and the vec transpose matrix using the commutation matrix. We have that the transpose and the inverse of the commutation matrix is its transpose.
A DIFFERENTIABLE STRUCTURE ON A FINITE DIMENSIONAL REAL VECTOR SPACE AS A MANIFOLD
Authors: Kurniadi Edi
Published: December 2023

There are three conditions for a topological space to be said a topological manifold of dimension  : Hausdorff space, second-countable, and the existence of homeomorphism of a neighborhood of each point to an open subset of  or -dimensional locally Euclidean. The differentiable structure is given if the intersection of two charts is an empty chart or its transition map is differentiable. In this article, we study a differentiable manifold on finite dimensional real vector spaces.  The aim is to prove that any finite-dimensional vector space is a differentiable manifold. First of all, it is proved that a finite dimensional vector space is a topological manifold by constructing a norm as its topology. Given a metric which is induced by a norm. Two norms on a finite dimensional vector space are always equivalent and they are determine the same topology.  Secondly, it is proved that the transition map in the finite dimensional vector space is differentiable. As conclusion, we have that any finite dimensional vector space with independent norm topology choice is a differentiable manifold.  As a matter of discussion, it can be studied that the vector space of all linear operators of a finite dimensional vector space has a differentiable manifold structure as well.
SENTIMENT ANALYSIS WITH LONG-SHORT TERM MEMORY (LSTM) AND GATED RECURRENT UNIT (GRU) ALGORITHMS
Authors: Putera Khano Muhammad Nazhif Abda , Saputro Dewi Retno Sari , Sutanto Sutanto , Wibowo Antoni
Published: December 2023

Sentiment analysis is a form of machine learning that functions to obtain emotional polarity values or data tendencies from data in the form of text. Sentiment analysis is needed to analyze opinions, sentiments, reviews, and criticisms from someone for a product, service, organization, topic, etc. Recurrent Neural Network (RNN) is one of the Natural Language Processing (NLP) algorithms that is used in sentiment analysis. RNN is a neural network that can use internal memory to process input. RNN itself has a weakness in Long-Term Memory (LTM). Therefore, this article examines the combination of Long-Short Term Memory (LSTM) and Gated Recurrent Unit (GRU) algorithms. GRU is an algorithm that is used to make each recurrent unit able to record adaptively at different time scales. Meanwhile, LSTM is a network architecture with the advantage of learning long-term dependencies on data. LSTM can remember long-term memory information, learn long-sequential data, and form information relation data in LTM. The combination of LSTM and GRU aims to overcome RNN’s weakness in LTM. The LSTM-GRU is combined by adding GRU to the data generated from LSTM. The combination of LSTM and GRU creates a better performance algorithm for addressing the LTM problem.
APPLICATION OF BAGGING CART IN THE CLASSIFICATION OF ON-TIME GRADUATION OF STUDENTS IN THE STATISTICS STUDY PROGRAM OF TANJUNGPURA UNIVERSITY
Authors: Imtiyaz Widad , Satyahadewi Neva , Perdana Hendra
Published: December 2023

The timeliness of graduation is used as the success of students in pursuing education which can be seen from the time taken and measured by the predicate of graduation obtained. The characteristics of students who tend to graduate not or on time can be analyzed using classification techniques. Classification and Regression Tree (CART) is one of the classification tree methods. There is a weakness in CART, which is less stable in predicting a single classification tree. The weaknesses in CART can be improved by using Ensemble methods, one of which is Bootstrap Aggregating (Bagging) which can reduce classification errors and increase accuracy in a single classification model. This study aims to classify and determine the accuracy of Bagging CART in the case of the accuracy of student graduation classification. The number of samples used is 140 data on the graduation status of Untan Statistics Study Program students from Period I of the 2017/2018 academic year to Period II of the 2022/2023 academic year. The variables used are the timeliness of graduation which is categorized into two namely Not and On Time, Gender, Semester 1 GPA, Semester 2 GPA, Semester 3 GPA, Semester 4 GPA, Region of Origin Domicile, High School Accreditation, Entry Path, Scholarship, and first TUTEP. A good classification can be seen from the accuracy value. The CART method obtained an accuracy value of 70%. While using the CART Bagging method obtained an accuracy value of 85.71%. Based on the accuracy value obtained, the application of the CART Bagging method can increase accuracy and correct classification errors on a single CART classification tree by 15.71% by resampling 25 times.