bluuebunny/crossref_metadata_2025 huggingface dataset:
Pengaruh Media PhET dengan Model Direct Instruction (DI) Terhadap Penguasaan Konsep Peserta Didik
Authors: Paramitha Reny , Zuhdi Muhammad , Kosim Kosim , Hikmawati Hikmawati
Published: December 2023

Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan media PhET (physics education technology) Interactive Simulations dengan model direct instruction (DI) terhadap penguasaan konsep peserta didik. Jenis penelitian yang digunakan pada penelitian ini adalah quasi eksperiment dengan desain penelitian non equivalent control group design. Populasi pada penelitian ini adalah seluruh peserta didik kelas VII SMPN 1 PRAYA TIMUR dengan jumlah 137 peserta didik, teknik pengambilan sampel menggunakan purposive sampling dan diperoleh peserta didik kelas VII2 dengan jumlah peserta didik 34 orang sebagai kelas eksperimen dengan penggunaan media PhET interactive simulations dengan model direct instruction dan kelas VII4 dengan jumlah peserta didik 34 orang sebagai kelas kontrol menggunakan model direct instruction. Sebelum diberikan perlakuan terlebih dahulu dilakukan pre-test untuk mengetahui kemampuan awal peserta didik selanjutnya baru diberi perlakuan dan diberi post-test. Instrumen tes penguasaan konsep dalam bentuk pilihan ganda. Berdasarkan hasil post-test kelas eksperimen memperoleh nilai rata-rata 74,41 dan kelas kontrol memperoleh nilai rata-rata 65,44. Hasil uji prasyarat kedua sampel homogen dan terdistribusi normal sehingga uji statistik yang digunakan adalah statistik parametrik t-test diperoleh 2,527 dengan taraf signifikan 5%. Maka, Ho ditolak dan Ha diterima. Sehingga dapat disimpulkan bahwa perlakuan berupa penggunaan media PhET interactive simulations dengan model direct instruction (DI) berpengaruh terhadap penguasaan konsep peserta didik.
Manajemen Inovasi Mode Hybrid Menuju Sekolah Kejuruan Mandiri Energi
Authors: Muliadi Muliadi , Hadi Syamsul
Published: December 2023

The issue of new and renewable energy sources in the future will increasingly have a very important role in meeting energy needs. The use of fossil fuels for conventional power plants over a long period of time will deplete petroleum resources. Renewable Energy (RE) is increasingly in demand worldwide due to environmental concerns. The new policy requires power grids to supply a certain percentage of their load with Renewable Energy Sources (RES). The aim of writing this article is to provide an innovative management model to accelerate towards energy independent schools based on renewable energy, hybrid wind and solar energy mode. The method used in this study is a qualitative approach with document study as a data source and descriptive analysis methods. This article discusses the management model in controlling the Hybrid system towards efficiency of system input and output. In addition, there is a discussion about the school community regarding energy sources and its application in schools in protecting the environment. This study found that the renewable energy management system model using a combination of HRES technology using Homer and GA, GA-based optimization is more cost-effective than Homer with a COE of at least 0.163 $/kWh and 0% unmet load. This GA based system has more PV penetration and less co2 emissions than Homer. HRES optimization is mostly achieved using artificial methods or commercial software, the artificial methods used are based on fuzzy. This study also recommends the Home PRO and Retscreen control systems as the most widely used commercial software in optimization and MPPT as the most widely used control method to ensure stability, protection and power balance of the system. This method is often used based on practical optimization, neural networks and fuzzy logic. Artificial methods are the most widely used methods in optimization because of their higher efficiency, good accuracy, and fast convergence. The disadvantage of this method is that it requires a complicated processing program. High efficiency and speed of classical methods, accuracy. The hybrid method uses the advantages of each method by maximizing performance and minimizing optimization processing time.
Development of nano titanium dioxide modified carbon paste electrode for determination of chloramphenicol in vaname shrimp (Litopenaeus vannamei) pond water by cyclic voltammetry
Authors: Zahro Nafisatuz , Setiarso Pirim
Published: December 2023

Chloramphenicol is an antibiotic that has activity against aerobic, anaerobic, and fungal bacteria and is often used in vaname shrimp farming pond water. Behind its usefulness, chloramphenicol has side effects for health, such as aplastic anemia, bone marrow suppression, stomach intestinal disorders, and optical and peripheral neuropathy. This study aims to determine the ability of carbon paste electrodes modified with nano titanium dioxide to detect chloramphenicol levels in vaname shrimp pond water by cyclic voltammetry. This research has successfully made an electrochemical sensor as a nano titanium dioxide-modified carbon paste electrode to detect chloramphenicol in vaname shrimp pond water samples. Nano titanium dioxide used as a modifier in carbon paste electrodes was characterized by XRD (X-Ray Diffraction) and FTIR (Fourier Transform Infrared), while the study of electrochemical characteristics using cyclic voltammetry method. The electrochemical sensor that has been made is a nano titanium dioxide-modified carbon paste electrode that can detect chloramphenicol in vaname shrimp pond water using the cyclic voltammetry method.
Tinjauan Yuridis Pelaksanaan Cyber Notary Di Masa Perkembangan Teknologi 4.0
Authors: Akbar Denny Imaduddin , Asikin Zainal , Sili Eduardus Bayo
Published: December 2023

Penelitian ini bertujuan untuk menganalisis pengaturan dan pelaksanaan cyber notary dan keabsahan akta yang dibuat menggunakan konsep Cyber Notary. Penelitian ini adalah penelitian hukum normatif. Metode pendekatan yang digunakan dalam penelitian ini yaitu konseptual (conceptual approach), dan Undang-Undang (statute approach). Pengumpulan bahan hukum dengan studi kepustakaan. Berdasarkan hasil penelitian dapat disimpulkan bahwa Pengaturan mengenai cyber notary secara umum telah disebutkan di dalam UUJN, UU ITE, UUPT yang memberikan peluang bahwa cyber notary dapat diterapkan di Indonesia. Namun, secara khusus berkaitan dengan Pelaksanaan cyber notary di Indonesia belum terdapat Undang-undang yang mengaturnya sehingga masih sulit untuk diterapkan mengingat tidak adanya aturan yang secara khusus mengatur bagaimana mekanisme pelaksanaan cyber notary itu sendiri. Di dalam hukum positif di Indonesia, terutama di dalam UUJN sendiri masih banyak unsur-unsur yang tidak memungkinkan untuk menerapkan cyber notary secara utuh di Indonesia, antara lain berkaitan dengan keautentikan/keaslian suatu akta dan juga sifat kerahasiaan yang harus dipegang teguh oleh seorang notaris sebagai pejabat umum. UU ITE secara jelas melakukan pengecualian kepada surat atau  dokumen yang dibuat oleh notaris tidak termasuk menjadi alat bukti hukum sah. Namun demikian, hal ini tidak menutup kemungkinan untuk menerapkan cyber notary di beberapa bidang yang tidak bertentangan dengan UUJN, contohnya adalah keperluan pembuatan akta relaas di dalam RUPS melalui media telekonferensi masih dapat dilakukan menggunakan konsep cyber notary. Sertifikasi transaksi yang menggunakan cyber notary adalah sah. Hal tersebut karena telah diatur dalam Pasal 15 ayat (3) Undang-undang Nomor 2 Tahun 2014 yang memberikan kewenangan kepada notaris untuk melakukan sertifikasi transaksi dengan menggunakan konsep cyber notary dengan tetap memperhatikan unsur-unsur akta autentik dalam Undang-undang Nomor 2 Tahun 2014 dan Pasal 1868 KUH Perdata yang merupakan syarat keautentikan akta. Akan tetapi, tidak semua kewajiban, wewenang maupun tugas notaris dapat dilakukan dengan menggunakan konsep cyber notary.
Approximately 2-Absorbing Submodule
Authors: Hussam Kadhim Safa , Dakhil shyaa Farhan
Published: December 2023

In this paper present and study the notion of approximately 2-Absorbing submodules as generalization of 2-Absorbing submodules. Many new properties of this class obtain.
Guia para produção de tijolo agroecológico e pigmentação
Authors: Kursancew Fernando , Menezes Fredson
Published: December 2023

Apresenta de forma prática o processo de produção de tijolos ecológicos de solo-cimento, demonstrando seu passo a passo. Trazendo a possibilidade da utilização do óxido de ferro para a pigmentação da massa para a criação de blocos coloridos.
Abordaje de la conducta suicida en infancia, adolescencia y juventud: análisis y aporte desde Caldas y Risaralda a las Rutas de Atención Integral en Salud.
Authors: Carvajal Pulgarín Stefanny , Jaimes Montaña Isabel Cristina
Published: December 2023

Suicidal behavior is a multifactorial phenomenon that can be intervened to prevent the act of suicide. Objective: To analyze the individual, family and sociodemographic factors associated with suicide attempts in childhood, adolescence and youth between 2016 and 2019-1 in Caldas and Risaralda. Methods: Retrospective and analytical study. Results: In both departments the highest suicide percentage occurred in Youth, also women attempted suicide more frequently (66.4%) and were comparatively younger than men in all cases (P <0.0001). Conclusions: age and sex are the individual factors associated with the case studies. Intersectoral work is essential for life-course prevention with a gender approach and actions in the educational environment in comprehensive health care routes.
Conectividad funcional del proceso de apego
Authors: Zapata Restrepo Nancy Julieth
Published: December 2023

The bond security derived from the process of attachment to the significant person has been associated with the development of psychological well-being when it is adequate and with the risk of presenting some psychopathology when it is altered. Knowing the brain processes typical of attachment development and its subsequent alteration broadens the understanding of the attachment process and its effects on the bonding process in adult life. This study aims to identify recent findings on attachment style and its relationship with brain processes. A systematic review of articles published in 2020, 2021 and 2022 was carried out, 13 studies were selected. It was found that there are variance in the brain anatomy of people according to their attachment style, that both limbic and cortical areas are involved in this process, and that the main neuromodulator is oxytocin. The importance of establishing bridges between studies based on neurosciences and those linked to the understanding of behavior or cognitive processes from clinical practice is evident, in order to broaden and make the theoretical constructions of the attachment process more complex.
Análisis de entrevistas cognitivas de la adaptación de la Salzburg Emotional Eating Scale al español
Authors: Vázquez-Vázquez Vanessa Monserrat , Díaz-Reséndiz Felipe de Jesús , Bosques-Brugada Lilián E. , Franco-Paredes Karina
Published: December 2023

Objective: to analyze the understanding and interpretation of the Salzburg Emotional Eating (SEES) in its version adapted to Spanish using cognitive interviews in mexican undergraduates. Method: the sample comprised 12 participants (18-23 years; M = 20, SD = 1,81) from a public university in the southern area of Jalisco, Mexico. The students completed the SEES and individually participated in a semi-structured cognitive interview. Results: the SEES adapted to Spanish was reported to be understandable and without problems for its interpretation, being appropriate in its cultural equivalence. Among the difficulties reported, the differentiation between similar emotions (for example, “happy” and “content”) stood out. For future studies, it is suggested to analyzed its understanding in different populations in order to continue amplifying the knowledge of cognitive processes in the SEES in the Mexican population.
Validation of the Global Belief in a Just World Scale within the Spanish Population
Authors: Ríos Rodríguez María Luisa , Moreno Jiménez Pilar , Hernández Ruiz Bernardo
Published: December 2023

The concept of justice, though inherently universal, is subject to substantial influence from social factors, affecting its perception. This study is dedicated to the adaptation and validation of an assessment tool for Global Belief in a Just World Scale (GBJWS) in the Spanish context.
Our investigation delves into the relationship between Belief in a Just World and key constructs such as Social Dominance, System Justification, and Right-Wing Authoritarianism, while also addressing the dimension of potential gender disparities.
Our findings demonstrate robust reliability coefficients, attesting to the scale's aptitude for assessing GBJW and exhibit highly favourable adjustment indices. Notably, our score analysis reveals elevated levels of BJW among men. This comprehensive research endeavour offers an invaluable global metric, facilitating transnational studies for understanding of justice perceptions on a global scale.
Reproductive fertility, infant mortality and haematological response of female Wistar rats intoxicated with lead acetate
Authors: Onu E. O  , Ozioko N. S  , Onu M. C  , Eze E. I  , A. E. Ede
Published: December 2023

Forty (40) adult female wistar rats were used for this study. They were procured from the Veterinary Teaching Hospital, University of Nigeria Nsukka. The wistar rats were three weeks old and had an average weight of 25g. They were divided into two groups (group A and B) replicated four times with 5 rats per replicate. The treated (group A) were dosed with 60mm/kg while the untreated (group B) were not intoxicated with lead acetate (control). The experiment lasted for four months during which the body weights and the haematological parameters of the rats were recorded on monthly basis. At the end of the experiment, the gonads of the wistar rats were decapitated for histological examination. The data collected were subjected to T-test using SPSS version 21. The probability level of P < 0.05 was used to determine the level of significant. The results showed that there were no significant change(s) on the body weights of the female wistar rats. In the haematological indices, the Hb, PCV and RBC had significant (p < 0.05) reduction almost below the normal values while the WBC tend to increase significantly above the control group. The histological examination of the ovary showed that group A (untreated group) had two corpora lutea (CL) which is an evidence of two successful ovulations. While the ovarian tissue of group B (treated group) showed one corpus luteum (CL) which is evidence of one successful ovulation and two atretic follicles which is evidence of arrested follicular development. In reproductive performance of the female wistar rats, there were significant (p<0.05) reduction in the values of Progesterone (pg/ml) where the treated group had (10.29 ± 0.92) and untreated group (17.54 ± 3.18) and in Estradiol (ng/ml), the treated group had (357.74 ± 5.30) and untreated group (382.63 ± 11.87). This study therefore, revealed that lead acetate has some detrimental effects on haematology and reproductive physiology of female wistar rats. It calls for the need to intensify actions or proffer solutions on measures to avoid constant exposure to lead acetate in Africa and the world at large in order to avert its negative consequences.
Psychological effects arising from male students dropped-out of school on parents in south-south Nigeria
Authors: Barinua Kekii Gbaranor  , Paul Kalalolo Biralo  , Comfort Oritseweyimi. Imarhiagbe  , Ada Nkemagu Okocha  , Godfrey Biteegeregha Pepple  , William Amebeobari Mube  , Sam Ewune Kinako  , Sotonye Asikimabo-Ofori  , Charls Headindueme Nwogu  , Abiye Felix George  , Humphrey Ndooyaabari Agara  , Okechukwu Ikpeazu
Published: December 2023

Students dropped-out are on the increase across the nation’s universities and several factors have led to this dropped-out of school. This dropped-out of school of students have psychologically affects parents. The aim of the study is to ascertain the Psychological Effects Arising from Male Students Dropped-Out of School On Parents in South-South, Nigeria. The participants were male parents. A sample size of 480 participants were used for the study and the participants age were within 40 to 76 years. The study lasted for three months. Each participant was given one questionnaire to filled and submit after instructions by the research assistants. The findings showed that 79.17% of the participants were within 50-70 years of age. 62.50% of the participants had tertiary education and 62.50% were married, 16.67% were single and 20.83% were divorced. 62.50% were civil servants. The findings of the students course of study shows that 14.58% studied MBBS, 16.66% law, 10.42% engineering, 8.33% accounting while 50.00% studied other disciplines. 62.50% of the participant’s children were first born, 20.83% second borne while 16.67% were last born and 83.20% of the students were dropped-out. 95.83% of the participants were not happy and 50.00% had increase in BP. The psychological effects on parents revealed that 18.75% had depression, 6.25% had anxiety, 8.33% were uninterested in life, 14.58% had difficulty in sleeping, 8.33% faced isolation, 4.17% were shamed, while 39.58% felt hopeless.
Subalpine ”pinification”: Early signs of a pending and distinct biogeographic shift in the Swedish Scandes: Review and updates
Authors: Leif Kullman  , Lisa Öberg
Published: December 2023

This study focuses, by in situ records and long-term observations, on recent (post-Litte Ice Age), arboreal change in a mountain birch dominated (Betula pubescens ssp. czerepanovii) valley in the Swedish Scandes. During the early Holocene thermal optimum and up to the onset of the mid-Holocene Neoglaciation, Scots pine (Pinus sylvestris) dominated the tree cover of this valley and formed the treeline ecotone adjacent to the early alpine tundra. Subsequently, and consistent with progressive cooling until the late 19th century, prevailing pine stands demised and opened for landscape-level expansion of birch and spruce (Picea abies). A short and distinct break in that process took place by the Medieval Climate warming phase, about 1000-800 years before present. Subsequently, during pre-industrial time, temperatures reached their lowest levels of the entire post-glacial period. This was the so-called Little Ice Age, which ended the long-term Holocene cooling. That cold-climate epoque was broken by the late-19th and early 20th century. Thereafter and up to the present-day, temperatures in the study region (summer and winter) have increased by slightly less than 2 °C. As a consequence, treelines of all species have advanced by a maximum of more than 200 altitudinal meters. Pine displays the most persistent expansion, particularly over the past few decades. “Falangist” occurrences appear in the pure birch forest, tens of kilometers and hundreds of meters, respectively, beyond and above the outposts by the early 20th century. Occasionally, scattered young pine trees now grow close to the birch forest limit and somewhat above. In particular, at sites where pine stands demised during the Little Ice Age, c. AD. 1300-1850, prolific regeneration and insignificant winter mortality are recorded over the past 15 years. In comparison, birch and spruce provide no analogous signs of recent expansion. It may be hypothesized that unabated climate warming and corresponding arboreal progression will profoundly transform the plant cover of this valley, and others alike, into the same pine-dominated state that prevailed during the early Holocene. In other words, a new biogeographic zonation pattern may be on the rise, with pine back as the dominant subalpine species. This option is focused by continued monitoring.
Potential for aquatic cultural services in fresh water for fresh water- based ecotourism, Vawnikulam reservoir, in Mullaitivu, Sri Lanka
Authors: S. M. Nilmini Samarakoon
Published: December 2023

Freshwater-based tourism comprises both tourism and an ecotourism component. The current study evaluates the diversity of freshwater fish in water resources that may suffer from freshwater-based tourism (Ecotourism) within the zone and investigates conceivable opportunities for such ecotourism in Vawnikulam major reservoir in Mullaitive district, Sri Lanka. The Mullaitive district has distinctive topographical highlights that have a high potential for fresh water resources. These highlights include three major tanks, sixteen medium tanks, and more than 100 minor tanks. There are just 21,399 land-based freshwater bodies, 8% of the total land area, and no significant perennial rivers that can be used to irrigate crops. This study used a mix of primary (qualitative and quantitative) and secondary information sources. Multi-gillnet rods and hooks were chosen as the material for the particular harvest strategy, which was utilized to gather the sample. From January to December 2022, the Vawnikulam major reservoir within the Mullaitive district was considered. Fish diversity, relative abundance, and diversity indices were determined and applied to analyze the potential for ecotourism based on freshwater resources. During the study period, 28 species including 11 families were recorded. According to national conservation status (NCS) ,7 Endemic (E) species 14 Native species (NA), 6 Introduced species, and 1 species were Near threatened (NT) were identified. In order to disentangle the pathways of fresh water as aquatic cultural services and create fresh water-based ecotourism activities that can develop in Mullaitive district, Sri Lanka, this investigation distinguished the travellers within the considered area. It also analyses appropriate freshwater-based ecotourism activities.
Design and control of a stand-alone microgrid with renewable energy sources
Authors: Mohamed G Moh Almihat  , Abdulgader Alsharif  , Salem A. Al-Hashmi  , Abdussalam Ali Ahmed  , Mohamed Belrzaeg
Published: December 2023

This study describes the design and operation of an autonomous microgrid that includes photovoltaic (PV) panels, wind turbines, a diesel engine, and a lithium-ion battery. The objective is to evaluate the efficiency and performance of a central control system that prioritizes renewable energy sources and, when necessary, uses a diesel generator and battery as backup power sources. Additionally, MATLAB is utilized to model and simulate the microgrid system. The needs for the microgrid, including the capacities of each energy source and the load demand, are first laid out in the study. In this study, the power production from the PV panels and wind turbines is estimated based on solar radiation and random wind speeds, respectively. The energy output from each source is measured and shown. After that, a centralized control system is established to oversee the operation of the microgrid. The control algorithm ensures that a considerable portion of the load need is satisfied via renewable energy sources. The extra generation that is stored as energy for later use charges the battery. In the case of a load deficit, however, the battery and diesel generator are employed to provide the demand. The battery's energy reserve and charge status are monitored and displayed. The research results, the suggested centralized control system efficiently controls the microgrid operation by maximizing the use of renewable energy sources and reducing dependency on the diesel generator. The findings highlight the need to use effective control techniques to maximize the integration of renewable energy sources.
Analytical and numerical study of hot rolling railway rail sections with the help of simulation and finite element software
Authors: Iman Ahmedy  , Jamshid Nasiri
Published: December 2023

Hot rolling of sections is one of the metal forming processes used to shape materials into profiles with a fixed cross-section, such as road rails. Iron is chosen for this process due to its repeatability. Despite the numerous equipment and high costs associated with it, the analysis of this process and its simulation can be highly desirable. In this process, the initial raw piece is passed through several rollers until the desired section's shape is created (1,2). The more passes are made, the greater the reduction in the cross-sectional area, and the tolerances increase. During rail rolling, several key factors play a crucial role, including the length of the workpiece, cross-section change, piece deviation, roller speed, and friction. This article focuses on investigating the effective parameters in this process using simulation software. For the rolling analysis, we use an isothermal and rigid model of rollers, considering the heat transfer between the rollers and the rail during the shaping process. The analysis is performed using thermal stress solutions in Abaqus/explicit. Additionally, the workpiece may deviate due to the asymmetry of the top and bottom shapes. Hence, we examine the effects of the friction coefficient between the part and the rollers on rail deflection, stress values, strain, and rolling force. The results indicate that the maximum stress on the rail's surface occurs below the points of contact with the rollers, leading to a higher percentage reduction.
PENGARUH DOSIS KOMPOS UNTUK MENINGKATKAN PERTUMBUHAN RUMPUT GAJAH (Penissetum puperium) PADA TANAH TERCEMAR LIMBAH OLI BEKAS
Authors: Aisah Rohmi Aisah , Asmarahman Ceng , Indriyanto Indriyanto
Published: December 2023

Used oil is B3 waste (hazardous and toxic material) which can cause soil pollution and reduce soil productivity. The accumulation of metals in the soil caused by waste oil pollution causes a decrease in soil quality and can become a pollutant that affects life around it. There needs to be a way to improve the quality of polluted soil, with phytoremediation techniques and the addition of organic matter to polluted soil. This research aims to analyze the effect of the dose of liquid compost on the growth of elephant grass in soil contaminated with used oil waste. This research used a Completely Randomized Design (CRD) with compost fertilizer factors consisting of 4 dose levels and a total of 60 sample observation units. The research results showed that a 50 ml dose of compost had the best effect on the growth of elephant grass planted on soil contaminated with used oil waste. A dose of 50 ml was proven to increase the growth of elephant grass in the parameters of plant height, number of tillers and fresh shoot weight.
POTENSI AGROFORESTRI KOPI UNTUK WISATA ALAM DI KESATUAN PENGELOLAAN HUTAN LINDUNG BATUTEGI
Authors: Nurrahman Muhammad Irfan , Darmawan Arief , Wulandari Christine , Kaskoyo Hari , Febryano Indra Gumay , Novriyanti Novriyanti , Iswandaru Dian , Herwanti Susni , Fitriana Yulia Rahma , Safe’i Rahmat
Published: December 2023

Coffee agroforestry in protected forest areas has the potential to be operated as a nature tourism destination. The purpose of this study was to analyze the feasibility of coffee agroforestry in the KPHL Batutegi area as a nature tourism area. Data collection was conducted by field observation and interviews using questionnaires. Data analysis was carried out using a modification of the Directorate General of Nature Tourism Object Operations (ADO-ODTWA) guidelines in 2003. The results showed that the potential of coffee agroforestry in KPHL Batutegi bordering Penantian Village and Sinar Banten Village has a medium potential value index. This means that the coffee agroforestry area in KPHL Batutegi has criteria that are not yet feasible to develop, because the element of accessibility (infrastructure), especially in the type of road taken with poor road conditions, makes it difficult to access the coffee agroforestry area. Tourism objects in the medium classification can be developed because a lot of planning is needed in structuring a good area in the future.
PENGARUH JENIS TANAH BERMIKORIZA TERHADAP PERTUMBUHAN SEMAI SAMAMA (Neolamarckia macrophylla (ROXB.) BOSSER) DI PERSEMAIAN
Authors: Rumeon Irma , Matinahoru Johan M , Hadijah Miranda H
Published: December 2023

Samama (Neolamarckia macrophylla (Roxb.) Bosser) is a type of local Indonesian commercial plant that proliferates, can grow in various types of soil, and spreads evenly naturally in Maluku, Papua, and Sulawesi which has good potential for development. Many soil microorganisms play a role in providing and absorbing nutrients by plants. To support the growth of samama in various types of soil, it is necessary to provide it with beneficial soil microbes, one of which is AMF. This research aims to determine the effect of mycorrhiza from three types of soil (entisol, inceptisol, and ultisol) from the rhizosphere of samama stands on the growth of samama seedlings in the nursery. The research was conducted in the Greenhouse of the Faculty of Agriculture, Pattimura University, Ambon, in June-October 2022 using a non-factorial completely randomized design (CRD) with treatment of mycorrhizal soil types from under samama stands, consisting of entisol, inceptisol and ultisol soil with three replications. The result showed a very significant effect on the observed parameters (percentage of root infection (A1= 67.78%), seedling height (A1=5.66 cm), increase in diameter (A1=0.155 cm), increase in number of leaves (A2=8 .44 strands) and root dry weight (A1=0.65 gr)). Specifically, to improve the quality of growth of Samama plant seedlings, it is recommended to use the mycorrhizal entisol soil type taken from Samama stands.
SIFAT FISIS BAMBU SEPANJANG BATANG PADA BAMBU SERO (Schizostachyum brachycladum Kurz.)
Authors: Luanmasse Alfi Dandi , Liliefna Leonard Dantje , Fransz J. J.
Published: December 2023

The objective of this study was to analyze the effect of internode position along the culm on the physical properties of sero bamboo. This study used a randomized complete block design with internode position along the culm as the treatment effect, comprising six levels, i.e., 0, 20, 40, 60, 80, and 100%, using four bamboo culms as blocks. The observed response variables were the bamboo's physical properties, such as green and air-dry moisture content, radial, tangential, longitudinal shrinkage, and specific gravity. The result of the study showed that green moisture content radial and tangential shrinkage, statistically, were influenced by their locations along the culm. In contrast, air-dry moisture content, longitudinal shrinkage, and specific gravity were independent of their locations along the culm.
KERAPATAN DAN KEANEKARAGAMAN VEGETASI BERDASARKAN TUTUPAN LAHAN PADA KELOMPOK HUTAN LINDUNG GUNUNG SIRIMAU PROVINSI MALUKU
Authors: Parera Evelin , Purwanto Ris Hadi , Permadi Dwiko Budi , Sumardi Sumardi
Published: December 2023

Protected forests are very important to support human life and the environment. One way to determine the condition of protected forests is through land cover. The aim of the research is to determine the condition of the vegetation on the land cover. The research method follows the circular plot method inventory procedure. The data analyzed includes density, the Important Value Index to test the density and level of dominance of vegetation types in an area and the Shannon Wiener Index to test the level of diversity of vegetation types. The highest density value in Primary Dry Land Forest is 15.17% and the Importance Value Index is 69.76%. The density value in secondary dry land forest is 18.37% and the importance value index is 80.02%. The bush density was 25.37% and the important value index was 95.03%. Species diversity in all land cover is included in the medium category with respective values ​​in primary dry land forests of 2.72; secondary dry land forest 2.53 and shrubs 2.07. These three land covers are included in the medium category, which means moderate diversity, sufficient productivity, fairly balanced ecosystem conditions, and moderate ecological pressure.
KETERGANTUNGAN SEMAI JOHAR (Cassia siamea LAMK) TERHADAP FUNGI MIKORIZA ARBUSKULA PADA MEDIA TAILING TAMBANG EMAS
Authors: Setyaningsih Luluk
Published: December 2023

Tailings are the wastes resulting from mining activities in the amalgamation of mine ore from the ground, with extreme characteristics such as a sand-dominated texture, high Pb heavy metal content, very low availability of carbon and macro nutrients. Consequently, the plants may not able to grow well in the tailings. The application of Arbuscular Mycorrhyza Fungi (AMF) is expected to increase the ability of forest plant seedlings to grow and develop in tailings media. The research was carried out in a greenhouse using johar (Cassia siamea Lamk) seedlings which were inoculated with AMF inoculum: Glomus manihotis, Glomus etunicatum, and mix inoculan (mycofer), and planted in tailings media collected from Pongkor gold mine for 8 weeks. Johar seedlings were able to grow in tailings media and AMF colonization to the seedlings was observed. The compatibility of multi-species inoculum, mycofer, is higher than single AMF inoculum. The height, diameter and biomass growth of johar seedlings in tailings media significantly (p<0.05) increased with AMF inoculation. Johar seedlings have a high dependence on AMF, on tailings media, undicated by value of MIE > 50%, suggesting that the AMF application to johar is very necessary for revegetation activities in tailings media.
PERSEPSI DAN PARTISIPASI MASYARAKAT TERHADAP EKOWISATA MANGROVE DI TELUK AMBON
Authors: Kaya Ivonne Raystika Gretha , Kaya Manuel , Badaruddin Ernywati
Published: December 2023

Ekowisata merupakan kegiatan pariwisata berbasis alam dengan sasaran utama untuk peningkatan ekonomi masyarakat dan menjaga ekosistem agar tetap lestari. Pengembangan ekosistem mangrove di Teluk Ambon menjadi kawasan ekowisata memerlukan studi mengenai persepsi dan partisipasi masyarakat. Hal ini diperlukan agar mencegah kegagalan dalam pengembangan ekowisata. Penelitian ini dilakukan pada bulan Juni-September 2023 dengan menggunakan penggabungan teknik in-depth interviews, semi-structured interview dan observasi untuk mendapatkan informasi serta data secara konkrit dan aktual dengan menggunakan metode accidental sampling (n=50) dari latar belakang berbeda. Data dianalisis secara deskriptif kualitatif dan kuantitatif menggunakan analisis regresi linier berganda. Persepsi masyarakat terhadap ekosistem mangrove di Teluk Ambon dipengaruhi oleh beberapa kondisi yakni terkait penggunaan lahan, limbah, keanekaragaman hayati dan pengembangan ekowisata di masa depan. Faktor jenis kelamin, umur, pendidikan, pekerjaan, pendapatan dan penggunaan areal tidak mempengaruhi preferensi masyarakat untuk berpartisipasi terhadap ekowisata mangrove di Teluk Ambon. Preferensi partisipasi masyarakat di Teluk Ambon umumnya dipengaruhi oleh manfaat yang nantinya akan didapat oleh masyarakat, sehingga masyarakat menyatakan bersedia untuk berpartisipasi pada setiap tahapan kegiatan yakni dalam perencanaan pembangunan, pengelolaan serta pengawasan di kawasan ekowisata mangrove di Teluk Ambon.
PERSEPSI MASYARAKAT TERHADAP REHABILITASI HUTAN; STUDI KASUS DI HULU DAERAH ALIRAN SUNGAI BENGAWAN SOLO, INDONESIA
Authors: Manto Arum Puspaningtyas , Nugroho Prasetyo
Published: December 2023

Successful forest rehabilitation in the upstream is essential to enhance upstream ecosystem functions for living systems. It is believed that the community's perception of the benefits and costs incurred by forest rehabilitation activities substantially impacts its implementation. Therefore, this research aims to determine the community's perception of the impacts (benefits and losses) and attitude of forest rehabilitation in the neighborhood of Wonorejo Village, located in the upper of the Bengawan Solo watershed. A questionnaire-based survey was conducted to explore community perceptions of the benefits of forest rehabilitation, perceived losses, and attitudes toward forest rehabilitation. In total, this research succeeded in collecting 307 respondents. The results suggest that forest rehabilitation facilitates several forest-based ecosystem services, including landslide prevention, water conservation, flood mitigation, forest preservation, and community collaboration. Nevertheless, the most frequently observed adverse consequence of forest rehabilitation is the proliferation of pests and diseases among forest vegetation. Moreover, the community generally has a positive attitude towards the forest rehabilitation program, considering that forest rehabilitation is an activity that is useful, wise, and profitable for the community. Hence, the results of the present study suggest that to ensure the success of forest rehabilitation, managers should not solely concentrate on the benefits of the initiative but also devise policies capable of mitigating its adverse effects and improving residents' positive attitudes toward forest rehabilitation initiatives.
POTRET SOSIAL EKONOMI BUDAYA MASYARAKAT SEKITAR HUTAN (KASUS PULAU BANDA BESAR) KECAMATAN BANDA NEIRA KABUPATEN MALUKU TENGAH
Authors: Latar Choirul Fachril , Kastanya Agustinus , Iskar Iskar
Published: December 2023

This study aims to determine the socio-economic, cultural conditions, and income levels of communities around the forest on Banda Besar Island. The research results show that the community's economic condition depends on forest products managed through gardening (Agroforestry). Data collected through observations and interviews was then analyzed descriptively, qualitatively, and quantitatively. The research results show that the community's economic condition depends on forest products managed through Agroforestry. The social culture of the people on Banda Besar Island is very open to the outside world; the people do not differentiate between immigrants and natives, and ethnic mixing occurs very quickly. Some cultural traditions of communities around the forest include washing wells, buka puang, kombak, papaito, belang, cakalele, and the nutmeg-picking dance. The income of communities around the forest from managing forests using an agroforestry system can increase community income from three types of commodities, namely nutmeg, cloves, and walnuts, obtaining a total average income for communities around the forest of Rp. 16,082,667,-KK/Year and an average.
PERSEPSI PENGUNJUNG TERHADAP WISATA ALAM AIR TERJUN ANGLO DI KABUPATEN PESAWARAN
Authors: Permana Galih W , Herwanti Susni , Setiawan Agus , Yuwono Slamet B , Febryano Indra G
Published: December 2023

Visitor perception is essential in the development of tourist destinations. This study aimed to measure visitors' perceptions of Anglo Waterfall nature tourism in Pesawaran Regency, Lampung Province. Data collection was carried out through observation and interviews using a questionnaire. Visitor perception data were analyzed descriptively and quantitatively using a Likert Scale. The study results show that visitors' perceptions of aspects of tourist attraction are in the reasonably good category with unspoiled environmental conditions. Visitors' perceptions of the promotion and information aspects are classified as not good because promotional activities on social media still need to be improved. Aspects of facilities, in general, are categorized as quite good with some additions and physical maintenance; the quality of the waterfall is classified as quite good, but the cleanliness of the tourist sites needs attention. Managers must add promotional activities and tourist information, add and maintain physical facilities visitors require, and conduct evaluations for optimal tourism development.
PENGEMBANGAN JASA LINGKUNGAN DI HUTAN LINDUNG DALAM MENDUKUNG EKONOMI MASYARAKAT DAN PENDAPATAN DAERAH
Authors: Airansi Adraisna , Doria Cici , Wulandari Christine , Bakri Samsul , Asmara Sandi
Published: December 2023

Developing environmental services in protected forests can be done in various ways, such as developing natural tourism, planting trees to reduce carbon emissions, and managing water resources. The approach used in this study is qualitative with the desk research method. The development of environmental services in protected forests can be carried out through various approaches, such as community-based forest management, partnerships between government and the private sector, and the use of information and communication technology. The development of environmental services can increase people's income by increasing the economic value of products produced from protected forests, assisting in maintaining sustainable management of natural resources, and increasing the availability of natural resources that are beneficial for human life and the ecosystem. The main challenges in managing environmental services are lack of access to capital and technology, as well as lack of public awareness and participation in managing natural resources. There are opportunities for developing environmental services in protected forests, such as increasing public awareness of the importance of preserving protected forests and advances in information and communication technology that can be used in developing environmental services. The development of environmental services in protected forests through social forestry programs is a solution to maintain human survival and preserve protected forests. This program provides economic, social and technological benefits for local communities and encourages sustainable forest management, as well as increasing community awareness in preserving forest functions.
STOK KARBON TUMBUHAN BAWAH DAN IKLIM MIKRO RUANG TERBUKA HIJAU
Authors: Diana Rita , Sutedjo . , Syilvianti Intan , Suba Rachmat Budiwijaya , Syoim M
Published: December 2023

This study was to determine differences in the percentage of canopy cover on carbon stock in three green oven space (RTH) areas at the Faculty of Forestry Mulawarman University (FFMU) and to determine differences in light intensity, temperature, and humidity at every plot location of understorey plants at the FFMU. The method used in this research was to measure the percentage of canopy cover, plant biomass, and carbon stock in plots of 2 x 2 m, measuring light intensity, temperature, and humidity from 06.00 in the morning to 18.00 in the afternoon. Data was collected at three RTHs, namely, RTH Guest House (Location 1), RTH Workshop (Location 2), and RTH Arboretum LSHK (Location 3). The result found the highest amount of carbon (130,8 tons/ha) and the percentage of crowns (59,42%). Medium green open space RTH Guest House amount of carbon (38,4 tons/ha), percentage of the canopy (55,69%), and the lowest RTH Arboretum LSHK amount of carbon (32 tons/ha) and percentage of the canopy (53.71%). Furthermore, the highest light intensity is in the RTH Guest House because the place is sparse, tenuous, and open so that light can directly enter and get more sunlight; moderate light is in the RTH Arboretum LSHK, and little light is in the RTH Workshop because the place is more closed so that light enters only a few. Then, for each temperature, the humidity values obtained are similar. The findings demonstrated variations in carbon storage due to vegetation density, age, growing place quality, and soil characteristics.
KAJIAN KEEKONOMIAN HUJAN DALAM MENUNJANG KEBUTUHAN AIR MASYARAKAT DI DESA BATU MERAH KOTA AMBON
Authors: Khouw I Fakhry , Putuhena Jusmy D , Pattimahu Debby V
Published: December 2023

The need for rainwater harvesting continues to increase as a complement to household water sources. Rainwater harvesting has received increasing public attention recently as an alternative water-saving strategy. Rainwater harvesting significantly reduces the use of drinking water. Savings at the household level change long-term water demand, provide more affordable household water supplies, and save communities money on sustainable water management. Therefore, this study aims to analyze the Economic Study of Rain in Supporting Community Water Needs in the Wae Batu Merah Watershed area in Sirimau District, Ambon City. The data analysis method calculates the economic value of rainwater to replace clean water purchased from DSA and tank cars. The calculation of the economic value of household water in the study area showed that the average daily water consumption based on the size of the city according to SNI 2002 for the study area was 150 liters/person/day. The economic value of rainwater utilization by households by converting DSA water prices and tanks shows that the economic value of rainwater utilization by households saves DSA water payment costs of Rp.49,641 per day and Rp.8,935,313 per year. Meanwhile, the use of rainwater by households saves the cost of paying for tank water by Rp.459,672 per day and Rp.82,740,994 per year.
A modified Aquila optimizer algorithm for optimization energy-efficient no-idle permutation flow shop scheduling problem
Authors: Utama Dana Marsetiya , Sanafa Nabilah
Published: December 2023

Increasing energy consumption has faced challenges and pressures for modern manufacturing operations. The production sector accounts for half of the world's total energy consumption. Reducing idle machine time by em­ploying No-Idle Permutation Flow Shop Scheduling (NIPFSP) is one of the best decisions for reducing energy consumption. This article modifies one of the energy consumption-solving algorithms,  the Aquila Optimizer (AO) algo­rithm. This research contributes by 1) proposing novel AO procedures for solving energy consumption problems with NIPFSP and 2) expanding the literature on metaheuristic algorithms that can solve energy consumption problems with NIPFSP. To analyze whether the AO algorithm is optimal, we compared by using the Grey Wolf Optimizer (GWO) algorithm. It com­pares these two algorithms to tackle the problem of energy consumption by testing four distinct problems. Comparison of the AO and GWO algorithm is thirty times for each case for each population and iteration. The outcome of comparing the two algorithms is using a t-test on independent samples and ECR. In all case studies, the results demonstrate that the AO algorithm has a lower energy consumption value than GWO. The AO algorithm is there­fore recommended for minimizing energy consumption because it can produce more optimal results than the comparison algorithm.
Optimisation-in-the-loop simulation of multi products single vendor-multi buyers supply chain systems with reactive lateral transhipment
Authors: Purnomo Muhammad Ridwan Andi
Published: December 2023

Considering that batik is one of the most popular products in Indonesia, it is important to analyse the supply chain system for batik products. In reality, the supply chain system for batik products enables orders between buyers to receive products more rapidly, allowing them to anticipate stock outs and obtain lower ordering costs than when ordering from vendors. It is referred to as reactive lateral transshipment. This paper discusses the development of a simulation-based stochastic optimisation model for a batik product supply chain system with multiproducts and single vendor-multi buyers. The utilised solution searching algorithm is a modified Genetic Algorithms (GA) executed in-loop with the developed simulation-based stochastic model. The results demonstrate that the proposed modified GA is able to provide a global optimum solution, allowing the proposed simulation-based stochastic model to reduce the joint total cost (JTC) of the investigated supply chain system by up to 19% when compared to the local optimisation model in each supply chain party.