bluuebunny/crossref_metadata_2025 huggingface dataset:
Educação sexual
Authors: Santos Vitória Moreira , Oliveira Sandra Kariny Saldanha de
Published: August 2023

A inserção da educação sexual no currículo escolar brasileiro e o desenvolvimento das práticas de educação sexual começaram no início do século XX. A educação sexual procura esclarecer questões relacionadas à sexualidade, sem preconceitos ou tabus. O objetivo geral desta pesquisa foi analisar as percepções dos professores de ciências dos anos finais do Ensino Fundamental da rede estadual de Boa Vista/RR em relação à temática Educação Sexual no ensino de ciências. A pesquisa é caracterizada como um estudo de caso, do tipo descritiva e qualitativa, onde os participantes foram vinte e quatro professores de ciências dos anos finais do ensino fundamental das escolas estaduais selecionadas em cada zona urbana da cidade de Boa Vista/RR. A análise de dados ocorreu por meio da análise de conteúdo de Bardin (2011). Os resultados demonstram que embora acreditem na abordagem interdisciplinar da temática, os professores ainda adotam metodologias de ensino e utilizam recursos didáticos que promovem apenas os aspectos biológicos da educação sexual, deixando de lado as dimensões sociocultural, psicológica, afetiva e ética da sexualidade humana. As metodologias mais utilizadas ao trabalhar a educação sexual são aulas expositivas, seminários, grupos de discussão, rodas de conversas, trabalhos de pesquisa, dinâmicas interativas e resolução de problemas. Conclui-se que o investimento em capacitações, material didático adequado e em projetos interdisciplinares que incluam os profissionais de saúde e a família são necessários para o desenvolvimento ideal da educação sexual no ensino de ciências nas escolas estaduais.
Jeolojik ve Jeomorfolojik Yapının 1999 Depremleri Sonrası Adapazarı Kent Dokusunun Oluşumundaki Etkisi
Authors: SAKAR Seda , TAGA Hidayet , ZORLU Fikret
Published: August 2023

Bu çalışmada 17 Ağustos 1999 (Mw 7,4) ve 12 Kasım 1999 (Mw 7,2) tarihlerinde meydana gelen depremler sebebiyle büyük ölçüde yıkıma uğrayan Adapazarı kent merkezinin, mevcut kentsel alanlar ve yeni gelişme alanlarının yer seçimi ile jeolojik ve jeomorfolojik yapının ilişkisinin ortaya koyulması amaçlanmıştır. Sakarya Nehri’nin taşıdığı alüvyon zemin yapısına sahip, yeraltı su seviyesinin oldukça yüksek olduğu Adapazarı Ovası’na kurulmuş olan Adapazarı kent merkezi; 17 Ağustos ve 12 Kasım 1999 depremlerinde meydana gelen sıvılaşmaya bağlı hasar oluşumunda, depremlerin etkilediği yerleşim alanları içerisinde ilk sırada yer almaktadır. 07.01.2010 tarihinde onaylanan Sakarya ili 1/100.000 ölçekli 2025 yılı Çevre Düzeni Planı kapsamında, Adapazarı kent merkezinin tamamını içine alan Merkez Planlama Bölgesi, çalışma alanı olarak kabul edilmiştir. Hava fotoğrafları, uydu görüntüleri, sayısal yükseklik modelleri ve kurumlardan elde edilen sayısal verilerin Coğrafi Bilgi Sistemleri (CBS) kullanılarak üst üste getirilmiş; çalışma alanına ait jeolojik – jeomorfolojik yapı ve kent formu arasındaki ilişki ortaya koyulmuştur. Temel amacı jeolojik ve jeomorfolojik yapının, deprem sonrası kent dokusu üzerindeki etkisinin değerlendirilmesi olan bu çalışmada; kentsel gelişmeye etki eden jeolojik ve jeomorfolojik faktörler, Analitik Hiyerarşi Süreci (AHP) yöntemiyle ağırlıklandırılarak; 1999 depremleri sonrası değişen kentsel dokuyla olan ilişkisi tartışılmıştır. Analizler sonucunda elde edilen sentez haritası ile kentsel dokunun çakıştırılması sonucunda çalışma alanının %65’inin yerleşme için uygun olmayan yapıda olmasına rağmen yapılaşmanın devam ettiği; 1999 depremleri sonrası mevcut kent merkezinin kuzeyinde yer seçen yeni gelişme alanlarının ise jeolojik ve jeomorfolojik açıdan yerleşime uygun yapıda olduğu tespit edilmiştir.
Exploring the psychological profile of rock climbing athletes participating in the Pekan Olahraga Nasional (PON) in West Nusa Tenggara: A psychometric analysis
Authors: Isnaini Lalu Moh Yudha , Hasbi  , Purwanto Didik , Suharti  , Setiawan Edi
Published: August 2023

Psychological factors are important factors in sports achievement. Psychological training programs in sports have been used in various fields to improve skills. This study uses survey with a test and measurement approach, a type of quantitative descriptive research. The subjects of this study were 8 rock climbing athletes. The instruments used were concentration, anxiety, and confidence. The results of the analysis obtained from the calculation of the psychological profile of the NTB rock climbing athletes are concentration with an average of 10.87, anxiety with an average of 19.50, motivation with an average of 115.87, and confidence with an average of 120.50. The weakest psychological indicator was concentration, while anxiety and self-confidence were average indicators. On the other hand, motivation was a strong point and was categorised as good. There were several limitations to consider in this study. First, this study focused on four psychological factors, namely concentration, anxiety, motivation, and self-confidence, while potentially neglecting other significant aspects of the psychological profile of the athlete. Second, there were only nine participants in the sample, limiting the generalizability of the results. Future research should surmount these limitations by incorporating a broader range of psychological factors and increasing the sample size to produce more exhaustive and representative results. The findings of this study highlight the significance of continuous mental training to enhance the performance of rock climbers. In addition, this study provides practitioners and researchers with a valuable resource for addressing issues related to an athlete's psychological well-being.
Electrocatalysis of hydrogen and oxygen electrode reactions in alkaline media by Rh-modified polycrystalline Ni electrode
Authors: Vasić Ljubinka , Tričković Nikola , Bošković Zaharije , Jovanović Aleksandar , Skorodumova Natalia , Mentus Slavko , Pasti Igor
Published: August 2023

Developing novel electrocatalysts for energy conversion applications is of utmost importance for reaching the energy security of modern society. Here we present a comprehensive investigation of rhodium-modified polycrystalline nickel as an electrocatalyst for hydrogen and oxygen electrode reactions in alkaline media. The surface modification of nickel electrodes was achieved by facile galvanic displacement (up to 30 seconds) from a highly concentrated acidic Rh3+ solution. The results demonstrate a significant enhancement in the electrocatalytic activity for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) on the Rh-modified Ni electrodes, positioning galvanic displacement as a viable approach to engineering advanced electrocatalysts for clean energy applications. On the other hand, the hydrogen oxidation (HOR) and oxygen reduction reaction (ORR) activities of the Rh-modified electrodes are lower compared to polycrystalline platinum. It is suggested that semiconducting Rh2O3 has a detrimental role on the HOR and ORR performance, while the activities of HER and OER, dominantly taking place on metallic Rh and conductive RhO2, are very high. This research sheds light on the mechanisms underlying the enhanced electrode kinetics on Rh-modified Ni electrodes and provides insights into the development of efficient and cost-effective electrocatalysts for renewable energy technologies.
Comment on “Potential Energy Surface of Group 11 Trimers (Cu, Ag, Au): Bond Angle Isomerism in Au3”
Authors: Rusakov Alexander
Published: August 2023

In this comment on the article “Potential Energy Surface of Group 11 Trimers (Cu, Ag, Au): Bond Angle Isomerism in Au3” by Persaud et al. (J. Phys. Chem. A 2019, 123, 6, 1198–1207, https://doi.org/10.1021/acs.jpca.8b11219), I explain the absence of the Jahn–Teller effect in the D3h configuration of Au3 within the formalism of relativistic double groups. I also revisit the isomerization profile of Au3 with spin-orbit density functional and coupled cluster approaches.
Alternative Concept of One-Dimensional Superconductivity – Key Role of Defects Revealed by Quantum Chemical Calculations of Lead Apatite
Authors: Vayssilov Georgi , Petkov Petko , Aleksandrov Hristiyan
Published: August 2023

Doped lead apatite has been recently reported to feature superconductivity at room temperature and ambient pressure, which may have huge impact on the progress of the humanity in general. The first principle calculations, aiming at understanding the reasons for such behavior, suggest that reduced form of undoped and copper-doped lead apatite contain one dimensional channels, which are free of ions, but with electrostatic potential inside providing conditions for unimpeded electron mobility, potentially leading to superconductivity. Key aspect is that channels are surrounded by lead cations, which generate the necessary electrostatic field but due to their high atomic mass have reduced mobility and do not block the channels even at ambient temperature. Our observations on the modeled structures allowed us to present an alternative concept for features, giving rise of the superconductivity based on chemical understanding of the structure and frontier orbital of the material.
An energy transfer mediated 4π spirocyclization intercepts the Staudinger β-lactam synthesis
Authors: Popescu Mihai , Parker Nicholas , Jia Zhuqing , Solon Pearse , Alegre-Requena Juan , Paton Robert , Smith Martin
Published: August 2023

The Staudinger ketene-imine cyclization is a highly effective method for the synthesis of β-lactams, but a complete understanding of its mechanism remains elusive. Here we show that a visible light-mediated energy transfer spirocyclization to yield β-lactams proceeds via a zwitterionic ground state intermediate that undergoes thermal conrotatory cyclization via a TS with significant diradical character. The ring closure of this intermediate is directly analogous to that proposed in the ketene-imine cyclization, showing that open-shell singlet diradicals may be found on the potential energy surface of the Staudinger reaction. Confirmation of the presence of the zwitterion through crossover experiments validates a long-standing prediction of reversibility in its formation. This demonstrates that visible light may offer an alternative route to generate and interrogate high-energy zwitterionic intermediates.
IMPLEMENTASI METODE PROTOTYPE UNTUK PERANCANGAN SISTEM INFORMASI PENYEDIA JASA MONTIR
Authors: Topares Andi Muh. Rahul Rajes , Kurniawan Hendra , Fajri Ika Nur
Published: August 2023

Kendaraan pribadi khususnya sepeda motor menjadi moda transportasi yang murah dan banyak digunakan oleh masyarakat di Indonesia. Pengendara sepeda motor menempati urutan pertama terbanyak dibandingkan dengan jenis kendaraan lain. Penggunaan sepeda motor juga terus mengalami peningkatan dari tahun ke tahun. Akan tetapi, hampir semua pengendara sepeda motor pernah mengalami masalah pada kendaraannya, seperti ban bocor, mesin macet, dan lain-lain. Bagi pengendara yang awam terhadap mesin, kondisi ini dapat menimbulkan kepanikan. Bengkel mempunyai peran penting terhadap segala masalah yang dihadapi oleh pengendara sepeda motor. Dengan demikian, terdapat peluang untuk mengembangkan sebuah sistem informasi penyedia jasa montir yang dapat menghubungkan antara pengendara sepeda motor dengan bengkel. Sistem ini dikembangkan berbasis website dan mengadopsi metode prototype untuk menyesuaikan kebutuhan pengguna. Diharapkan melalui penelitian ini dapat menghasilkan sistem informasi penyedia jasa montir yang dapat memudahkan pencarian bengkel dan meningkatkan daya saing antar bengkel.
SISTEM PENDUKUNG KEPUTUSAN PEMILIHAN KARYAWAN TERBAIK MENGGUNAKAN METODE PROMETHEE (STUDI KASUS: PT. SHEN MAKMUR SENTOSA)
Authors: Christian Stevanus , Mardiani Mardiani
Published: August 2023

Tujuan pengembangan sistem ini adalah menciptakan sebuah Sistem Pendukung Keputusan berbasis web menggunakan metode PROMETHEE untuk membantu PT. Shen Makmur Sentosa dalam proses pemilihan karyawan terbaik. Proses seleksi karyawan di PT. Shen Makmur Sentosa saat ini masih menggunakan metode manual dengan spreadsheet. Hal ini mengakibatkan efisiensi yang rendah dalam penanganan waktu, kurangnya transparansi dalam hasil seleksi, dan kemungkinan terjadinya kesalahan manusia dalam proses seleksi. Dengan demikian, diperlukan sistem yang dapat mempercepat proses seleksi karyawan dengan hasil yang akurat dan konsisten. Metode PROMETHEE digunakan dalam pengembangan sistem ini untuk memilih karyawan terbaik berdasarkan kriteria yang telah ditentukan. Sistem pendukung keputusan ini dikembangkan dengan teknologi web, sehingga mudah diakses dan hemat penyimpanan. Hasil pengembangan sistem ini menunjukkan bahwa Sistem Pendukung Keputusan pemilihan karyawan terbaik berbasis web menggunakan metode PROMETHEE dapat efektif dan efisien membantu PT. Shen Makmur Sentosa dalam seleksi karyawan. Selain itu, hasil pengembangan sistem ini juga memberikan kontribusi pada pengembangan aplikasi SPK berbasis web dalam bidang teknologi informasi.
Strategic Manoeuvering in 2019 Campaign Speeches in the Eastern Cape Province in South Africa: Extended Pragma-Dialectical Perspective
Authors: Sijadu Zameka Paula , Mwombeki Gaspardus
Published: August 2023

This article investigates how political candidates in the Eastern Cape Province in South Africa employed means of strategic manoeuvring during the provincial election campaigns of 2019. It assumes the framework of the extended pragma-dialectical theory of argumentation, by first reconstructing the argumentation structure, identifying the means of strategic manoeuvring, and finally, critically analysing the prototypical speech acts in the political campaign discourse. The data were collected from the isiXhosa newspaper I’solezwe LesiXhosa during the campaign from February to April 2019. The findings demonstrate commissives and assertives as the prototypical speech acts in the political argumentative discourse in the Eastern Cape Province. In addition, dissociation is manifested in multiple contexts to persuade the audience of the standpoint that the opposition parties are more visionary than the incumbent party, African National Congress.
Effect of Eco-Processed Pozzolan (EPP) Mixed with Calcium Oxide to Dry Density and Physicochemical of Peat Soil
Authors: Mohamad Habib Musa , James Mohd Suharmin , Zakaria Siti Nor Farhana , Amaludin Adriana Erica , Fui Tom Ngui Min , Zainorabidin Adnan
Published: August 2023

Peat is a problematic soil, and it is a common problem faced by engineers in construction. The characteristics that have been noted before are high moisture content, poor shear strength, great compressibility, and long-term settlement. For this research study, it focuses on stabilizing peat soil using EPP and CaO. There are three main tests that were conducted in this research study: index properties testing, compaction testing, and For Index Properties testing, five (5) experiments were conducted to study the index properties of disturbed peat soil, which are moisture content, fiber content, liquid limit, organic content, pH, and specific gravity. Next, for the Compaction Test, using a 4.5 kg rammer, define the optimum mixture of stabilizer that is mixed with different volumes of 5%, 10%, 15%, and 20% of stabilizer. In this study, the expected result is to inspire an in-depth study of the use of EPP material and chemical CaO as peat soil stabilizers for better utilization of problematic soil. The main finding was that the mixture with the exact amount of moisture, EPP, and CaO helped stabilize the soil and cure peat soil. Thus, this study confirms the idea of treating peat with EPP and CaO, enhancing the properties of peat soil, and sustaining the settlement over loading for a period of time accordingly. 20% mix of EPP and CaO produces the highest dry density, showing that dry density increases linearly with the amount of mixture to stabilize peat. The crystallization process between peat and EPP was pronouncedly observed where smaller particles identified as EPP filled the gaps in between the pores identified from SEM. The silicon (Si content developed from each spectrum ranged from 14.4% to 17.7%. The EDX results show significant results where mineral crystallization occurred in the coagulation process. Doi: 10.28991/CEJ-2023-09-07-011 Full Text: PDF
Effect of Cooling Conditions, Retrofitting on Strength of Concrete Subjected to Elevated Temperature
Authors: Kharmale Swapnil B. , Sathe Pramod S. , Kolekar Yashwant A.
Published: August 2023

Concrete has a high degree of fire resistance at moderate temperatures. High temperatures, however, cause concrete to lose its stiffness and strength. The effects of cooling techniques and retrofitting on the strength of concrete exposed to high temperatures have not been synchronized in previous studies. This experimental research aims to evaluate the effect of cooling conditions and the effectiveness of retrofitting concrete subjected to elevated temperatures. Four types of concrete: M 20 normal concrete (NC); M 20 metakaolin concrete (MC); M 40 standard concrete (SC); and M 40 self-compacting concrete (SCC) are considered in this study. A total of 864 samples consisting of cube, beam, and cylinder specimens are subjected to sustained elevated temperatures of 400oC, 600oC, and 800oC for 2 hours rating. The weight and strength of half of the heat-damaged samples are assessed following natural air cooling (NAC) and water jet cooling (WJC). The remaining 50% of samples retrofitted with carbon fiber reinforced polymer (CFRP) are tested to evaluate the upgraded strength. The experimental findings demonstrate that water jet cooling (WJC) causes more strength degradation, and CFRP proves to be effective in restoring the strength of heat-deteriorated specimens. Overall, self-compacting concrete (SCC) has shown high resistance to elevated temperatures. Doi: 10.28991/CEJ-2023-09-07-013 Full Text: PDF
The Reliability of W-flow Run-off-Rainfall Model in Predicting Rainfall to the Discharge
Authors: Tama D. Riyadi , Limantara Lily M. , Suhartanto E. , Devia Y. Padma
Published: August 2023

This research intends to predict the discharge (run-off) from rainfall for which the model is built using W-flow. The research location is in the Gajah Mungkur reservoir (Wonogiri) in Indonesia. The estimation of reservoir inflow has an important role, mainly in the scheme of reservoir operation and management. However, the heterogeneity of complex spatial and temporal patterns of rainfall and also the physiographic context of a watershed cause the development of a model of real-time run-off and rainfall that can accurately predict the reservoir inflow to become a challenge in the development of water resources. In relation to the analysis and prediction of rainfall, the constraint and problem that is still often faced is the minimal availability of observed rainfall data spatially as well as temporally; the time series of rainfall data is not long and complete enough; and the number of rainfall stations is less evenly distributed. The methodology consists of carrying out the literature study, collecting as much rainfall data as possible to build a W flow model, then carrying out the model calibration and analyzing the prediction of real-time reservoir inflow for operation. The result shows that the dependable discharge of the Wonogiri watershed shows that there are two peak discharges, which happened on February II (the second half of February) and December II (the second half of December). However, the discharge is decreasing in July and reaching its lowest level in October II (the second half of October). Doi: 10.28991/CEJ-2023-09-07-015 Full Text: PDF
Experimental and Numerical Parametric Studies on Inclined Skirted Foundation Resting on Sand
Authors: Al-Shyoukhi Tamer , Elmeligy Mahmoud , Altahrany Ayman I.
Published: August 2023

Skirted foundation behavior is enhanced due to the increase in skirt angle. The bearing capacity of the inclined skirted foundations resting on sandy soil is influenced by the soil parameters and skirting systems. Finite element analyses were carried out using Plaxis-3D software to find out the influence of the relative density, the internal friction angle of the supported soil, and the additional skirts on the bearing capacity of the inclined skirted foundations. The experimental work on a small physical scale was also carried out to support the numerical findings, which give an acceptable agreement. The findings revealed that the increase in relative density resulted in a significant increase in the bearing capacity of the inclined skirted foundation. In the same way, as the internal friction angle increases, the bearing capacity is affected by this increase, which improves the bearing capacity value. The effect of the additional skirts on the bearing capacity is observed to be neglected, and, in some cases, it causes a negative effect. The findings of this study contribute to a greater comprehension of the behavior of inclined skirted foundations and can assist in the future design of more efficient and effective foundation systems. Doi: 10.28991/CEJ-2023-09-07-017 Full Text: PDF
Evaluating Carbon Footprint in the Life Cycle Design of Residential Concrete Structures in Jordan
Authors: Al-Omari Omar , Alkhdor Ahmad , Al-Rawashdeh M. Abed , Al-Ruwaishedi M. R. , Al-Rawashdeh S. B.
Published: August 2023

The construction industry is a significant source of greenhouse gas emissions, and there is a growing global interest in reducing the environmental impact of carbon dioxide emissions associated with building construction and operation. Concrete, the most commonly used material in construction, is known to release a substantial amount of environmentally harmful waste throughout its life cycle, including production, construction, operation, and demolition. The worldwide production and consumption of concrete contribute to approximately 5% of all human-related CO2 emissions each year. To assess the carbon footprint of concrete manufacturing and its application in construction projects, a comprehensive approach called life cycle assessment (LCA) is necessary. This paper presents a new process-based LCA approach to analyze carbon emissions and evaluate the carbon footprint of concrete from raw material extraction to the end-of-life stage. To address carbon emissions throughout the life cycle of concrete structures in the Middle East, the study adopts a case study approach, focusing on selected concrete structures in Jordan. The findings from these case studies highlight that the operational phase of concrete structures is the primary contributor to carbon emissions. By thoroughly examining the carbon cycle within structures and their interactions with the surrounding ecosystem, significant reductions in CO2 emissions, environmental deterioration, and its consequences can be achieved. Doi: 10.28991/CEJ-2023-09-07-07 Full Text: PDF
The Influence of a Damaged Concrete Cover on the Behavior of a Simply-Supported Beam
Authors: Shadhan Khalid K. , Al-Zahra Bilal Ismaeel Abd , Kadhim Muhammad Jawad
Published: August 2023

The concrete cover is a part of the concrete that provides the required protection for the reinforcing steel within the required element from external effects. This concrete cover can be damaged for an assortment of reasons, one of which is environmental factors. As a result, this research focused on the effect of worn concrete covering on the structural response of beams. Moreover, the possibility of repairing or replacing this concrete cover with a cement material was done by testing seven beams with the exact dimensions (2700 mm long, 250 mm deep, and 140 mm wide). The first specimen was a control specimen, while in the remaining specimens, a part of the concrete cover was removed in the midspan region with a length of 600 mm and in different formats. The part below the neutral axis (tension zone) was removed in the first two specimens. The part above the neutral axis (the compression zone) was removed in the second two specimens. The whole cover was removed within the specified distance for the other two specimens. In one out of every two of these six specimens, the removed concrete cover was replaced with cementitious material. A flexural test was performed for all specimens, and the conclusion was reached that damaging or removing the concrete cover from the tensile region (below the neutral axis) is less harmful than from the compression region since the beam is often designed as a cracked section. Also, removing the concrete cover from the compression region gives cracks a greater width than removing the concrete cover from the tension region at the same loading level. In the case of replacing the concrete cover with a cementitious one, if the replacement is in the compression zone, it will result in cracks when loading with a width greater than that of the rest of the cases. For specimens that removed their concrete covers from the tension zone, compression zone, and the whole section, the failure loads decreased by 39%, 20%, and 23%, respectively, concerning the control beam. In contrast, all these specimens were repaired with cementitious materials, with an ultimate load capacity approximately equal to the control beams. From these results, any damaged concrete cover for beams in any zone with cementitious materials having high strength and a good bond with old concrete sections can be repaired. Doi: 10.28991/CEJ-2023-09-07-09 Full Text: PDF
Is the Environmental-Economic Performance Relationship Symbiotic? Evidence from Listed Non-Financial Firms in Nigeria
Authors: Ajape Mohammed Kayode , Paramita V. Santi
Published: August 2023

This study aims to examine whether environmental sustainability disclosure (ESD) connects symbiotically with the economic performance of non-financial listed firms in Nigeria. The study employed ex-post facto design by collecting secondary data on return on equity (ROE) and measures of ESD from annual financial reports of eighty-six (86) listed non-financial firms with environmentally significant operational impact in Nigeria. Descriptive statistics, including mean and standard deviation were used to describe the properties of the data while the Granger causality test was applied to test the stated hypothesis. The results indicate the existence of a bi-directional association between the measures of ESD and economic performance. Thus, it portrays the economic consequence of listed firms’ operations. The study took a detour from examining mere relationships to delve into causality and thus, implies that commitment to ESD presage benefits to both the host communities and firms. The value of the study lies in the fact that it disentangled the question of causality between ESD and the economic performance of listed non-financial firms in Nigeria. Therefore, within the Nigerian context, the study is pioneer evidence of symbiotic relations between ESD and ROE and hence, improves sustainability discourse.
Okul Öncesi Çocuklarının Geometri Tahtası İle Temel Geometrik Şekilleri Oluşturma Süreçlerinin İncelenmesi
Authors: ERGÜL Ayşegül
Published: August 2023

Okul öncesi dönemde temel geometrik şekillerin öğrenilmesi ilk önce şekillerin fark edilmesi ve isimlerinin öğrenilmesi aşamaları ile başlamaktadır. Çocuklar gelişim sürecinde ilerledikçe, şekiller arasındaki benzerlik ve farklılıkları da görebilmektedirler. Çocukların sonraki aşamalarda şekiller arasında ilişki kurabilmeleri ve daha karmaşık geometri işlemlerini yapabilmeleri için, oyun ve somut materyallerle şekilleri öğrenme gereksinimleri vardır. Geometrik şekillerin kazanılmasını destekleyen araçlardan biri geometri tahtasıdır. Bu araştırmada çocukların üçgen, kare ve dikdörtgen şekillerinin farklı türdeki örneklerini (farklı konum, basıklık ve çarpıklık özelliği olan) geometri tahtası üzerinde tanıma ve oluşturma süreçleri incelenmiştir. Anasınıfına devam eden 24 çocuk ile bireysel görüşmeler yapılmıştır. Çocuklar geometri tahtası üzerinde verilen yönergeleri uygularken gözlem yapılmış ve değerlendirme formuna kaydedilen bu gözlem notları betimsel analiz değerlendirilmiştir. Elde edilen bulgulara göre, çocuklar bu şekilleri tanımakta ve özelliklerini açıklarken en çok “kenar-köşe” kavramlarını kullanmaktadır. Tahta üzerinde şekilleri oluştururken bu şekillerin en çok bilinen biçimlerini oluşturma eğiliminde oldukları görülmüştür. Temel geometrik şekilleri ve özelliklerini ezberlemeden, somut bir materyal üzerinde uygulamalı öğrenilmesi için geometri tahtası gibi materyallerin çocuklar için önemli olduğu düşünülmektedir.
PENGARUH PENGELUARAN PEMERINTAH, TINGKAT PENGANGGURAN TERBUKA DAN PENDAPATAN ASLI DAERAH TERHADAP TINGKAT KEMISKINAN DI PROVINSI SUMATERA UTARA PADA TAHUN 2017 - 2021
Authors: Juanda Reza , Siregar Muhammad Kahpi
Published: August 2023

This study examined the influence of government expenditure, open unemployment rate, and local revenue on the poverty rate in North Sumatra Province. This study used the panel data analysis method. Based on the test results, the model selected was a random effect model. Partially, the results showed that government expenditure negatively influenced the poverty rate in North Sumatra, and the open unemployment rate and local revenue did not affect the poverty rate in North Sumatra Province. Simultaneously, government expenditure, the open unemployment rate, and local revenue influenced the poverty rate in North Sumatra Province.
PENGARUH PERDAGANGAN INTERNASIONAL TERHADAP PERTUMBUHAN EKONOMI INDONESIA
Authors: Nurhayati Nurhayati , Juliansyah Hijri
Published: August 2023

This study examined the `effect  `of  `exports, `imports, exchange rates,  `and   `domestic investment to economic growth in Indonesia. This study used secondary  `data   `from 2000 to 2019. The  `data  `analysis technique used was multiple linear regression models (Time Series) with  `the  `help  `of Eviews 10. The results partially indicated that export, import, exchange rate, and PMDN activities did not influence economic growth in Indonesia. However, simultaneously, export, import, exchange rate, and PMDN activities positively and significantly influenced economic growth in Indonesia. The coefficient of determination of R2  `in  `this  `study was 0.831, meaning  `that exports, imports, exchange rates, and PMDN were 0.609173 or 60.9%, which were declared to have no effect, and the remaining 39% was stated not to be  `influenced  `by other variables   `outside of this study.
PENGARUH MEDIA PEMBELAJARAN VIDEO BERBASIS PRAKTIKUM TERHADAP KETERAMPILAN GENERIK SAINS PESERTA DIDIK DI SMA NEGERI 1 MADAT
Authors: Saputri Rahmi , Zahara Syarifah Rita , Fatmi Nuraini
Published: August 2023

Penelitian ini bertujuan untuk mengetahui pengaruh media pembelajaran video berbasis praktikum terhadap keterampilan generik sains peserta didik di SMA Negeri 1 Madat. Penelitian ini menggunakan jenis penelitian quasy experiment dengan desain nonequivalent control group design, pengambilan sampel pada penelitian dilakukan dengan menggunakan teknik purposive sampling. Pengambilan data dilakukan di kelas X MIA 1 sebagai kelas eksperimen dengan jumlah siswa 24 orang dan X MIA 2 sebagai kelas kontrol dengan jumlah siswa 26 orang. Data dianalisis menggunakan Microsoft Excel dan Software SPSS Ver 25. Hasil analisis pada kelas eksperimen diperoleh nilai rata-rata posttest sebesar 86,76 dan kelas kontrol sebesar 77,76. Berdasarkan uji independent sample t test diperoleh nilai signifikansi 2-tailed sebesar 0.00<0.05. Sehingga dapat disimpulkan bahwa media pembelajaran video berbasis praktikum dapat meningkatkan keterampilan generik sains peserta didik pada materi Hukum Newton di SMA Negeri 1 Madat
PENGARUH FAKTOR PSIKOLOGI WISATAWAN TERHADAP PENGAMBILAN KEPUTUSAN BERKUNJUNG KEMBALI PADA MASA PANDEMI COVID-19 DI DESA WISATA PUJON KIDUL
Authors: Wicaksono Raudya , I Putu Gde Sukaatmaja , I Nyoman Darma Putra
Published: August 2023

This study was conducted with the aim of analyzing consumer decisions to visit Pujon Kidul Tourism Village, Malang Regency, East Java during the Covid-19 pandemic. There are five factors used in this study, namely motivation, perception, attitude, learning, and personality. This study uses the associative method with a quantitative approach. Data were collected using a questionnaire method with a sample of 100 visitors. To analyze the data, the researcher used Structural Equation Modeling (SEM) based on PLS (Partial Least Square). This research concludes that motivation, perception, attitude, and learning have a significant positive effect on the decision to visit Pujon Kidul Tourism Village. The higher the motivation of tourists to travel, the better the perception of tourists towards a destination, the more information and knowledge about the description of a place as a tourist destination, and the easier it is for tourists to get information about tourist destinations, the higher the decision to visit. Meanwhile, personality has no significant positive effect on visiting decisions, which means that an increase in personality factors has an impact but is not significant on visiting decisions.
KERUSAKAN TEGAKAN TINGGAL PADA TEKNIK REDUCED IMPACT LOGGING DI INDONESIA: TINJAUAN SISTEMATIS
Authors: Budiaman Ahmad , Rahayu Nazma
Published: August 2023

Forest harvesting in the natural production forest management in Indonesia is mostly carried out using conventional logging techniques and causes serious damage to residual stands and soil resources. One of the efforts made to reduce this environmental damage is the application of reduced impact logging (RIL) techniques. This study aimed to collect and analyze research results related to the damage to residual stands caused by RIL in the natural production forest management in Indonesia. This study used a systematic review method. A systematic literature search was carried out at data sources such as Google Scholar, Research Gate, Science Direct, and SINTA, which were published between 1996-2021. All studies reported that applying RIL techniques can reduce the damage to the residual stands.
COMPOSITION AND AGE CLASS OF LONG-TAILED MACAQUE (MACACA FASCICULARIS) IN THE TROPICAL PEAT ECOSYSTEM (CASE: In Buffer Village Around Orang Kayo Hitam Forest Park)
Authors: Egeustin Yoannisa , Iswandaru Dian , Wulandari Christine , Novriyanti Novriyanti , Prasetia Hendra
Published: August 2023

The long-tailed mcaque (Macaca fascicularis) has a fairly wide population distribution in Indonesia. According to IUCN data, the population of long-tailed mcaque is decreasing every year, the cause is a decrease in habitat quality. One of the habitats of long-tailed mcaque which is currently under pressure due to conversion is located in a buffer village around the Orang Kayo Hitam Forest Park (Tahura OKH). This study aims to analyze the composition and age class of long-tailed monkeys. Observation methods were used to observe long-tailed mcaque based on morphological characteristics such as coat color and body size. Based on the results of the study, the composition of long-tailed mcaque was divided into two groups, the residential group (KP) and the river border group (KS). The number in KP is 8 individuals with an age class of 5 adults, 3 immature while the number in KS is 27 individuals with an age class of 18 adults, 4 immature, 3 juvenile, 1 infants. This condition illustrates that the river border habitat is better than the residential habitat. In addition, adults and adolescents are more numerous, indicating individuals who have a function for reproduction and continue reproduction. This breeding rate is the potential for regeneration of long-tailed mcaque and the potential for the regeneration process of peat ecosystems through the role of long-tailed monkeys as pollinators for seed dispersal.
JUNGLE RUBBER AND PIONEER TREE: INVESTIGATING LEAF MORPHOLOGICAL VARIATION OF Alstonia scholaris R. BR. IN JAMBI
Authors: Damayanti Inggar
Published: August 2023

Human activity has reduced natural forests in Indonesia and triggered their transformation into, for example, jungle rubber land, as is often found in the Jambi Province of Central Sumatera. Forming jungle rubber through successional processes involves important pioneer trees such as Alstonia scholaris. The pioneer species' performance is influenced by site factors, the initial biodiversity status, cultivation treatment, and management inputs. The study reported here was conducted to assess leaf morphological variation of A. scholaris as preliminary indicators of difference in response and growth performance in several CRC990 plots (50 m x 50 m) of two distinct landscapes: Bukit Dua Belas National Park and Harapan Rain Forest. Results of the analysis of variance showed that the difference in landscapes gave rise to a significant effect on leaf morphology variable NV (venation number) for A. scholaris. Differences between plots within the landscapes were significant in the variables venation number (NV) and petiole ratio (PR) for A. Scholaris. The results of the distribution of leaf morphological variation in A. scholaris based on multivariate analyses (PCA) showed no clustering due to landscape effects.
Analisis Kebermanfaatan Program Kampus Mengajar Mahasiswa Program Studi Pendidikan Biologi FKIP Universitas Mataram
Authors: Maulidina Aulia , Setiadi Dadi , Santoso Didik
Published: August 2023

Salah satu upaya yang dilakukan pemerintah untuk meningkatkan kompetensi lulusan adalah dengan mengeluarkan kebijakan MBKM. Diantara 8 program dalam kebijakan MBKM, mahasiswa Program Studi Pendidikan Biologi paling banyak menaruh minat pada program kampus mengajar. Program Kampus Mengajar merupakan intrepretasi dari kebijakan MBKM yang memberikan kesempatan kepada mahasiswa untuk meningkatkan kompetensinya melalui asistensi mengajar di satuan pendidikan dasar. Tujuan penelitian ini adalah mendeskripsikan kebermanfaatan program kampus mengajar bagi mahasiswa Program Studi Pendidikan Biologi. Jenis penelitian ini adalah deskriptif dengan pendekatan kualitatif. Teknik pengumpulan data menggunakan angket, wawancara, dan studi dokumen. Adapun sampel dalam penelitian ini diambil menggunakan teknik purposive sampling, yaitu mahasiswa Program Studi pendidikan Biologi FKIP, Universitas Mataram yang telah mengikuti program kampus mengajar angkatan 3 dan 4. Hasil penelitian menunjukkan bahwa kebermanfaatan program kampus mengajar pada mahasiswa Program Studi Pendidikan Biologi berupa peningkatan kompetensi dari segi sikap yaitu peningkatan etika kolaborasi, kepekaan social dan kemampuan komunikasi; peningkatan kompetensi keterampilan khusus terjadi dari segi jiwa kepemimpinan dan kreativitas; peningkatan kompetensi keterampilan umum pada mahasisiwa terjadi dari segi kemampuan mengambil keputusan dan kemampuan memelihara jaringan; dan peningkatan kompetensi pengetahuan terjadi dari segi pedagogi, dimana mahasiswa mengetahui bagaimana mengelola kelas dengan baik.
SPACING AND FERTILIZER REQUIREMENT OF NEW VARIETIES OF COTTON
Authors:   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, N.T JAGANATHAN , P POTHIRAJ ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, R VENKITASWAMY ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, M PREMSEKHAR ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003, S PURUSHOTHAMAN ,   Department of Agronomy, Tamil Nadu Agricultural University, Coimbatore 641003
Published: August 2023

Field experiments conducted at Coimbatore revealed that the new cotton varieties viz., TCH.959, 77/10, ACP 27-1/1 and TCH.1002 recorded higher seed cotton with a spacing of 50 x 20cm and with a fertilizer level of 80:40:40 kg NPK ha-1.
EFFECT OF COIR PITH AS AN AMENDMENT FOR TANNERY POLLUTED SOILS
Authors:   Department of Soil Science Tamil Nadu agricultural university, Coimbatore 641003, Tamil Nadu, P SINGARAM
Published: August 2023

The letting in of tannery effluent causes pollution of ground water and degradation of cultivable land. Soil amendments viz., composted coir pith, pressmud, gypsum and farm yard manure were tried for increasing the productivity of polluted land. Application of 10 Uha of composted coir pith gave increased yield of maize (Co.1) and finger millet (Co.13). The increased yield was due to improved physical condition and keeping the soil moist preventing capillary rise of salts to the surface.
INITIATION OF CALLUS AND PLANT REGENERATION IN COTTON (Gossypium hirsutum L.)
Authors:   School of Genectics, Tamil Nadu Agricultural University Coimbatore  641 003, A KALAMANI
Published: August 2023

The hypocotyl explants of MDU 9 cultured on Murashige and Skoog medium supplemented with kinetin (1.0 mg/lit.)+ IAA (1.5 mg/lit.) formed callus in 20 days. The calli on sub culture to media containing benzyl amino purine (2.0 mg/lit.) developed shoots. Multiple shoots were formed from each callus mass. These on further sub culture with reduced level of benzyl aminopurine developed well. Root initiation and growth was promoted by lowering the sucrose concentration and supplementing the culture media with NAA (3.0 mg/lit.).
ALR 2-A NEW GROUNDNUT VARIETY FOR POLLACHI TRACT
Authors:   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, V MYLSWAMI , P NAGARAJAN ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, P VINDHIYA VARMAN ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, A JOHN JOEL ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, T.S RAVEENDRAN ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, R RABINDRAN ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, P DEVASENAPATHY ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, K RAJAMANICKAM ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101, A CHRISTOPHER LOURDURAJ ,   Agricultural Research Station,Tamil Nadu Agricultural University Aliyarnagar 642 101
Published: August 2023

An attempt to evolve a groundnut variety with superior yield, high oil content and resistant to abiotic and biotic stresses has resulted in the isolation of a promising culture ALG 56. It is a pureline selection from ICGV 86011 (DH 3-20 x USA 20) (NCAC 2232). This bunch groundnut matures in 105 days and is suitable for Chitraipattam (April). It out yielded the checks Co 2 and VRI 2 with substanted yield and field tolerance to diseases and pests. High oil content of 52% and a seed dormancy period of 15 days are the additional advantages of this variety. It is a good quality fodder too. Hence it was released as ALR 2 for rainfed and irrigated conditions of Pollachi tract.
ECONOMICS OF RICE CULTIVATION UNDER DIFFERENT LEVELS OF NITROGEN AND WATER MANAGEMENT PRACTICES
Authors:   Dept of Agronomy, Tamil Nadu Agricultural University Coimbatore 641003, V KRISHNA KUMAR , S SUBRAMANIAN ,   Dept of Agronomy, Tamil Nadu Agricultural University Coimbatore 641003
Published: August 2023

Results of field experiment on the economics of water and N management practices on low land rice indicated that grain yield increased upto 150 kg N ha' in the South West Monsoon (SWM) and Summer seasons. Continuous 5 em submergence (1) or recouping submergence one day after disappearance (12) did not influence grain yield during SWM whereas continuous submergence was necessary to record more grain yield during summer. Straw yield recorded were highest with continuous submergence in both the seasons and with 225 kg N ha in SWM season and 150 kg N ha-1 in summer season. Gross and net returns as well as benefit cost ratio were highest with 150 kg N ha-1 in both the seasons. A gruss return of Rs.7121/- and 7432 ha were obtained with continuous submergence in SWM and summer seasons, respectively, whereas, net return and benefit cost ratio were highest with submergence one day after disappearance of water. The variety IR 50 outyielded CO37 in all the aspects of study. Recouping submergence one (SWM) or three (Summer) days after disappearance of water recorded more return per rupee invested on water and N in both the seasons. Application of N at 150 kg ha-1 gave higher retum per rupee on water, whereas, the net return per rupee on N decreased beyond 75 kg N ha-1.
HETEROSIS IN WATERMELON (Citrullus lanatus Thunb. Mansf.)
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, P.C RAJENDRAN , S THAMBURAJ ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: August 2023

Six inbred parental genotypes viz., Pudur-2 (P1), Honey Island Yellow Flesh (P2), Asahi Yamato (P3), Sugar Baby (P4), Maruthamalai-I (Ps) and H.W.I (P6) representing a wide geographic diversity selected for this study were obtained from various sources and were used for the experiment.
NITROGEN RESPONSE IN MAIZE
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, S BASKARAN , P KANDASAMY ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, T.S MANICKAM ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: August 2023

The response of N on maize in fifteen soils viz., ten low N soils and five medium- N soils with N at 0, 67.5, 135 and 202.5 kg/ha revealed that the responses were quadratic in medium N soils and sigmoid in low N soils. The optimum dose for grain and straw yield was 148 and 173 Kg N/ha respectively in medium N soil.
COMBINING ABILITY FOR YIELD AND ITS COMPONENTS IN COWPEA
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, K THIYAGARAJAN , C NATARAJAN ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, R RATHNASWAMY ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, S RAJASEKARAN ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: August 2023

Combining ability analysis, involving four lines and three testers was made in cowpea and studied for ten quantitative characters. The variance due to g.c.a. and s.c.a. showed that gene action was predominantly non-additive for days to 50 per cent flowering, days to maturity, plant height, pod length, seeds per pod, 100 grain weight and yield per plant and primarily additive for primary branches per plant, clusters per plant and pods per plant. The genotypes Co 4, C 87, C,152 and CoVu 4 were found to be the good general combiners. The crosses co 3 x C 152, Co 3 x CoVu 4, Co 4 x C 152, V 87 x C 152 and KC 199 x KC 195 were observed to have higher s.c.a effects for some of the yield components.
DAMAGE LEVEL AND CONTROL OF POTATO TUBER MOTH IN NILGIRIS DISTRICT.
Authors:   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu, N CHANDRAMOHAN , K NANJAN ,   Tamil Nadu Agricultural University Coimbatore  641 003 Tamilnadu
Published: August 2023

Potato tubermoth damage was more at lower altitude (1000-1850 M) than higher altitude (1900 2500 M). Application of either quinalphos 0.05% or diffubenzuson 0.05% registered lesser damage by tuber moth and yield was higher in quinalphos treated plots.