bluuebunny/crossref_metadata_2025 huggingface dataset:
Influence Of Heat Treatment on Mechanical Properties of Parts Produced by Laser Powder Bed Fusion from Wear Resistant Alloys
Authors: Junghetu Corina , Chris Chris , Horvay Kerri , Murphy Tom
Published: September 2023

Applications that require wear resistance use hard materials which are difficult to machine. The most common forming method is by grinding but that limits the part geometry that can be achieved. Using additive manufacturing to form parts will open the range of possible geometries and functionalities that have never been explored. In this study, the mechanical properties, microstructure, standardized wear testing and toughness were evaluated for as-built and heat-treated samples for a series of wear-resistant alloys developed to provide a range of properties for different tooling applications. The samples were prepared by printing with the laser powder bed fusion technique (LPBF) and then heat treated in different conditions.
Damage Maps Of Cemented Carbides Under Contact Loading: Assessment By Means Of Hertzian, Conical, And Vickers Indentation
Authors: Fooladi Mahani S. , Liu C. , García-Marro F. , Cai X.K. , Jiménez-Piqué E. , Llanes L.
Published: September 2023

Resistance to contact loading is a key issue to consider for microstructural design of cemented carbides to be used as tools and wear components. In this work, Vickers, conical and Hertzian indentation has been implemented to assess contact damage response for three microstructurally different WC-Co cemented carbides. Deformation and damage linked to induced imprints were inspected at both surface and subsurface levels, the latter through sequential tomography. Results are presented as damage maps as a function of applied load. It is found that critical load values for emergence of cracks as well as for their subsequent evolution are strongly dependent on indenter geometry (linked to specific stress field) and fracture toughness of the material. Practical implications of these findings, in terms of future damage tolerance studies, are finally discussed.
The reporting of research on Gas Atomisation
Authors: Dunkley J J , Aderhold D , Williamson T , Mellor A , Westnedge J
Published: September 2023

The ever-increasing interest in additive manufacturing (both binder jetting and LPBF) has led to a renewed interest in gas atomising research across the globe. As this is being done by workers with different atomising equipment, the opportunity arises to test both theoretical and empirical correlations on a variety of designs. This paper reviews some relevant literature and sets out some basic equations and the relevant parameters that should ideally Figureure in all reports on gas atomisation tests. A methodology is proposed to standardise reporting of date, e.g. mass-median, standard deviation, graphical methods and operating parameters to allow some benchmarking by gas atomiser operators and allow improvements to be clearly identified. Remaining unanswered questions on gas atomisation will be discussed, which would surely benefit from more comprehensive publication, in particular the question of the importance of gas pressure in determining “efficiency” of atomisation, and how “efficiency” might be assessed and compared.
Comparative Life Cycle Inventory Of PBF Additive Manufacturing And CNC Machining
Authors: Reijonen Joni , Silva Juan , Pulli Oskar , Hahtonen Kasper , Ulkuniemi Jari , Niskanen Jari , Puukko Pasi , Metsä-Kortelainen Sini
Published: September 2023

Additive manufacturing is often referred to as resource-efficient or even sustainable manufacturing with very little reliable scientific data to support the claims. Here we have made a comparative life cycle inventory of the energy and raw material flows during PBF-LB AM and CNC machining of three components having different geometrical features and functionalities: gear, impeller and manifold. The scope of this study was on the manufacturing phase of the components (from gate-to-gate). The energy and material consumptions were measured, with emphasis on providing accurate, transparent and reliable data of the most important input flows through direct measurement. For all the three studied components, PBF-LB consumed more energy, but required less material, than CNC machining. Geometry of the component had the most significant impact on the energy and material consumption in these processes. Optimizing part geometry and process parameters in PBF-LB to minimize resource consumption showed much potential for improvement.
Key Aspects Of The Debinding & Sintering Atmosphere For 17-4 PH Stainless Steel Fabricated Via Binder Jetting
Authors: Zissel Kai , Bernardo Quejido Elena , Bhattacharya Sankhya , Forêt Pierre , Hryha Eduard
Published: September 2023

Binder Jetting (BJT) of metals is a multi-step process that relies on the sintering of printed parts to reach the intended material properties. A crucial but often overlooked step after printing is debinding, which is impacted by the processing atmosphere and strongly determines the efficiency of the following sintering process. A tailored processing atmosphere composition and flow can facilitate removal and decomposition of the binder as well as efficient removal of the decomposition products. The success of debinding and sintering is closely correlated, and both require a specific but often different processing atmosphere in terms of purity and composition in order to achieve the required material properties and tolerances of the sintered component. In this study, different atmospheres for the debinding and sintering of 17 4 PH stainless steel manufactured via BJT were studied utilizing chemical analysis and microstructural examination to determine the effectiveness of the debinding and sintering processes.
Upcycling Of PM T15 Steel Swarf Via FAST/SPS Processing
Authors: Keszler Monica , Grosswendt Felix , Jaeger Sebastian , Assmann Anna-Caroline , Weber Sebastian , Bram Martin
Published: September 2023

PM T15, a high-speed steel containing tungsten, is a valuable material used in tools such as cutting disks. When PM T15 tools are machined, the excess swarf is disposed in landfills, and the valuable elements contained in the steel are lost. Since this swarf is often contaminated with grinding media such as SiC, cBN, and corundum, separation processes are needed to recover the steel, and direct recycling is not possible. However, Field assisted sintering technology/spark plasma sintering (FAST/SPS) has the potential to generate new materials from PM T15 swarf containing these residues via the dissolving of carbides and nitrides into the steel matrix and freezing insoluble corundum into the matrix. Our work has shown the capability of FAST/SPS to create dense and semi-dense pellets of PM T15 steel containing grinding media from industrial waste. These pellets are characterized for mechanical properties for potential further deformation and net-shaping into new tools.
Influence Of Particle Size Variations And Nanoparticle Coating On Flow Behavior Of 316L Stainless Steel Powder And Mechanical Properties In Powder-based Additive Manufacturing
Authors: Wilkens Yannik , Ghavampour Ebrahim , Lantzsch Tim
Published: September 2023

In powder-bed-based additive manufacturing (AM) processes, the flowability of the powder is decisive for the quality of the manufactured part. Since fine particle fractions worsen the flowability, in the laser powder bed fusion (LPBF) process the lower limit of the powder fraction is usually 15 µm. Nanoparticle coatings can reduce the cohesive forces between particles. It has been investigated how the fumed silica (SiO2) nanoparticle coating affect the initial flow behavior of standard gas-atomized (15-45 µm) 316L powder and powders with modified particle size distribution (0-45 µm, 15-63 µm, 0-63 µm). It was demonstrated that flowability and bulk density increased as a result of the coating. Relative density and mechanical properties of the LPBF specimen showed similar results compared to the un-coated powder with increased tensile strength. The economic potential of coated powder for AM was demonstrated by the successful LPBF processing of fractions 15-45 µm and 0-63 µm.
Fused Filament Fabrication of Non-Ferrous Alloys
Authors: Zanon Matteo , Müller Armin , Kossakowski Darek , Roch Aljoscha , Croteau Joseph , Pelletiers Tom
Published: September 2023

Among the sinter-based technologies, Fused Filament Fabrication (FFF) is proving itself as a low capital investment, small series approach to 3D printing. Firmly established for plastics, it can be extended to metals by composite filaments with around 60% metal loading by volume. The large quantity of binder, necessary for the filament compounding and extrusion, poses special challenges to the debinding process. This becomes especially true with reactive materials such as aluminium, but also when targeting high electrical conductivity in copper, which is extremely sensitive to residual impurities. Metal powder and binder expertise must then be brought together to enable this technology to compete in the 3D printing market. The current joint work presents results with both aforementioned classes of non-ferrous powders, highlighting the impact of debinding procedure and powder characteristics on the final sintered and microstructural properties. Effect of heat treatment is also investigated.
Investigations Of Powder Reuse On Flowability And Mechanical And Metallurgical Behavior Of Alloy 718 For L-PBF
Authors: Ozeren Emre , Unver Caglar , Mert Bilgin Guney , Ertekin Beyzanur , Tas Alican , Orhangul Akın , Dilektasli Emre
Published: September 2023

In L-PBF, metal powders are used as feedstock material and can be reused for successive productions. The reused powder usage requires attention in high-quality and reliable part production since the reused powder may effect flowability and built-part properties. In this study, Alloy 718 powder was used over a 40 series of L-PBF build cycles without rejuvenating the powder. The powder characterization was performed in order to investigate the flow behavior of reused powder using several methods. Besides, tensile tests, Archimedes and image processing density measurements were performed in order to investigate the behavior of built-part produced by reused powders. Furthermore, chemical composition analyses were carried out over the bulk samples built via L-PBF. The results showed that no major and meaningful difference was seen among 40 cycles in some powder characteristics and built parts behavior while there are prominent differences in some powder characterization methods and in metallurgical behavior.
Impact of Printing Parameters on Green Density Homogeneity in Lithography-based Metal Manufacturing
Authors: Vogel Lucas , Ali Khan Qaiser , Zimmermann Martina , Burkhardt Carlo
Published: September 2023

The need for additive manufactured parts with high dimensional accuracy and high surface quality leads to innovation in sinter-based AM. A promising approach is the emerging lithography-based metal manufacturing (LMM) which combines powder metallurgy and stereolithography. As this is a novel technology, this study aims to investigate the printing parameters: degree of powder filling of the feedstock, layer thickness, coating speed, coating mode and size of the material roll, with the help of a DoE. After the previously published investigation of green part characteristics, the samples are debound and sintered. These parts are analysed with focus on geometrical accuracy and densification. The DoE enables analysis of correlations between printing parameters and densification behaviour. Therefore, it improves the understanding of the technology and enables further optimization.
Simulation and Additive Manufacturing of Complexly Designed Aircraft Component
Authors: Liu Yan , Adolfsson Erik , Christoffersson Örjan , B. Hosseini Seyed , Yan Zhenghua
Published: September 2023

An innovative component used for the cargo handling systems of Boeing 737 aircraft is developed to improve loaders' working conditions and protect cargo spaces, passenger luggage, and goods from damage. Since the design of the component makes it difficult to manufacture using conventional techniques, metal Binder Jetting, an Additive Manufacturing technique both faster and more cost-effective compared to the conventional laser/electron beam techniques, is used. However, there is a risk of thermally induced distortion in connection with the post-processing, specifically the sintering step. To address this, a 3D computational fluid dynamics simulation model is developed and simulations are made to identify where and when unwanted distortions may occur during the sintering process. In the simulation, the sintering process follows about 15 hours full sintering cycle with all the heating, holding and cooling stages. The simulations are compared with experiments to validate the numerical results.
PENINGKATKAN HASIL BELAJAR KEBUTUHAN DASAR MANUSIA SISWA SMK NEGERI 4 NEGARA DENGAN MENERAPKAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING
Authors: Rina Savitri Ni Kadek , Hajar Abdul
Published: September 2023

Penelitian ini bertujuan untuk meningkatkan aktivitas dan hasil belajar siswa pada mata pelajaran Kebutuhan Dasar Manusia materi perawatan klien meninggal dunia siswa kelas XII Asisten Keperawatan 1 (AK 1) SMK Negeri 4 Negara Tahun Ajaran 2021/2022 dengan menerapkan model Problem Based Learning. Penelitian ini dilaksanakan dalam dua siklus, dengan tahapan perencanaan, pelaksanaan tindakan, pengamatan dan refleksi. Penelitian ini dilaksanakan di SMK Negeri 4 Negara dengan subjek penelitian adalah 34 siswa pada kelas XII Asisten Keperawatan 1 (AK 1) SMK Negeri 4 Negara Tahun Ajaran 2021/2022. Dalam mengumpulkan data menggunakan metode penhgamatan dan tes. Dalam  analisis data yang digunakan adalah analisis deskriptif. Hasil penelitian menunjukkan adanya peningkatan aktivitas siswa dan aktivitas siswa dari siklus I ke siklus II. Aktivitas siswa kelas XII AK 1 pada penelitian siklus I dengan prosentase 60,75% meningkat menjadi 79,16% pada siklus II. Rata-rata hasil belajar siswa kelas XII AK 1 pada penelitian siklus I 72,81 meningkat menjadi 81,10 pada siklus II. Presentase ketuntasan klasikal hasil belajar pada siklus I sebesar 61,76% meningkat 23,53% menjadi 85,29% pada siklus II.
MENINGKATKAN HASIL BELAJAR SISWA PADA MATA PELAJARAN PEMELIHARAAN SASIS SEPEDA MOTOR KELAS XI TEKNIK DAN BISNIS SEPEDA MOTOR SMK NEGERI 1 MUARA MUNTAI MELALUI PENERAPAN MODEL PEMBELAJARAN PROBLEM BASED LEARNING
Authors: Masyudi Masyudi , Saharuna Saharuna , Mansyur Mansyur
Published: September 2023

Dalam penelitian ini memiliki tujuan untuk meningkatkan hasil belajar siswa pada mata pelajaran pemeliharaan sasis sepeda motor di kelas XI Teknik dan Bisnis Sepeda Motor SMK Negeri 1 Muara Muntai. Kegiatan ini masuk dalam penelitian tindakan  kelas dengan menggunakan model pembelajaran Problem Based Learning. Untuk subyek yaitu siswa kelas XI Teknik dan Bisnis Sepeda Motor  berjumlah 6 siswa. Penelitian menggunakan dua siklus dengan teknik pengambilan data tes hasil belajar dan dokumentasi. Penelitian pada mata pelajaran pemeliharaan sasis sepeda motor menggunakan model Problem Based Learning ini dapat meningkatkan hasil belajar siswa. Dilihat dari hasil belajar siswa pada siklus I rata-rata sebesar  62,8 presetase kentuntasan 33,34% dan pada siklus II rata-rata kelas menjadi 85,77 dengan ketuntasan 83,35%. Hasil belajar siswa memenuhi batas indikator keberhasilan 75%. Hal ini dikarenakan pada siklus II dilakukan perubahan perbaikan model pembelajaran menggunakan Problem Based Learning yaitu menyampaikan masalah yang nyata dan menampilkan benda aslinya secara langsung untuk dipraktikkan membuat peserta didik cepat memahami materi, perubahan ini berdasarkan refleksi pada siklus sebelumnya.
PENERAPAN MODEL PEMBELAJARAN PBL BERBASIS VIDEO UNTUK MENINGKATKAN HASIL BELAJAR KIMIA MATERI REDOKS
Authors: Setyorini Nency , Agustinawati Agustinawati
Published: September 2023

Rendahnya hasil belajar  peserta didik di SMK Muhammadiyah 5 Babat pada pembelajaran kimia materi redoks, dikarenakan mereka mengalami kesulitan untuk memahami materi. Dalam hal ini guru masih sering menggunakan metode ceramah dan tidak melibatkan peserta didik untuk aktif dalam belajar. Penelitian ini adalah penelitian tindakan kelas yang bertujuan untuk meningkatkan hasil belajar kimia pada materi Redoks  melalui model         pembelajaran Problem Based Learning  (PBL) berbasis video. Subyek penelitian ini adalah   peserta didik kelas X Layanan Kesehatan SMK Muhammadiyah 5 Babat sebanyak 20 peserta didik. Metode yang digunakan diskusi dan dengan pendekatan saintifik-TPACK. Pengumpulan data dilakukan dengan menggunakan teknik observasi dan tes di akhir pembelajaran di setiap akhir siklus. Hasil penelitian menunjukkan bahwa adanya peningkatan secara signifikan pada setiap siklus pembelajaran. Pada pra siklus diperoleh persentase ketuntasan hasil belajar peserta didik sebesar 62%. Pada Siklus I mengalami kenaikan persentase ketunasan hasil belajar peserta didik sebesar 70% dan siklus II persentase ketuntasan mencapai 82,5%. Setelah diterapkan model pembelajaran Problem Based Learning (PBL) berbasis video pada kelas X layanan Kesehatan SMK Muhammadiyah 5 Babat dapat meningkatkan hasil belajar  pada mapel kimia materi Redoks.The low learning outcomes of students at SMK Muhammadiyah 5 Babat in redox material chemistry learning, because they have difficulty understanding the material. In this case the teacher still often uses the lecture method and does not involve students to be active in learning. This research is a classroom action research that aims to improve chemistry learning outcomes on Redox material through a video-based Problem Based Learning (PBL) learning model. The subjects of this study were students of class X Health Service SMK Muhammadiyah 5 Babat as many as 20 students. The method used is discussion and scientific approach-TPACK. Data collection was carried out using observation and test techniques at the end of learning at the end of each cycle. The results showed that there was a significant increase in each learning cycle. In the pre-cycle, the percentage of students' complete learning outcomes was 62%. In Cycle I, the percentage of student learning outcomes increased by 70% and in Cycle II the percentage of completeness reached 82.5%. After applying the video-based Problem Based Learning (PBL) learning model in class X Health services at SMK Muhammadiyah 5 Babat, it can improve learning outcomes in redox material chemistry subjects
PENERAPAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN HASIL BELAJAR KIMIA MATERI IKATAN KIMIA
Authors: Wati Rosmala Mala , Musdalifah Musdalifah
Published: September 2023

Penerapan model Problem Based Learning merupakan upaya guru untuk meningkatkan Hasil Belajar kimia pada peserta didik kelas X-MIA.1 di SMAN 1 Baitussalam. Tujuan penelitian tindakan kelas ini adalah meningkatkan Hasil Belajar Kimia materi Ikatan Kimia pada peserta didik kelas X-MIA1 melalui penerapan model Problem Based Learning di SMAN 1 Baitussalam. Subjek penelitian adalah peserta didik kelas X-MIA1 dengan jumlah peserta didik 22 orang. Metode yang digunakan diskusi dan dengan pendekatan saintifik-TPACK. Penelitian tindakan kelas dengan prosedur penelitian yang diterapkan dalam III siklus, yaitu di awali dengan perencanaan, pelaksanaaan tindakan, observasi dan refleksi. Pengumpulan data dilakukan dengan soal tes pada setiap siklus. Hasil analisis data penelitian menggambarkan bahwa melalui penerapan model Problem Based Learning hasil belajar kimia peserta didik meningkat. Pada siklus I ketuntasan belajar peserta didik sebesar 68,18% dan meningkat di siklus II dan siklus III masing-masing 81,82% dan 95,45%.
PENGARUH PENGGUNAAN VIDEO CONFERENCE TERHADAP MOTIVASI BELAJAR MAHASISWA JURUSAN PENDIDIKAN TEKNIK ELEKTRO UNIVERSITAS NEGERI MAKASSAR
Authors: Santri Santriani , Karim Sugeng A , Mangesa Riana Tangkin
Published: September 2023

Penelitian ini bertujuan untuk mengetahui bagaimana pengaruh penggunaan video conference terhadap motivasi belajar mahasiswa pada mata kuliah Mesin Listrik 2 Jurusan Pendidikan Teknik Elektro Universitas Negeri Makassar. Penelitian ini menggunakan metode penelitian kuantitatif. Teknik pengumpulan data yang dilakukan adalah melalui angket dan dokumentasi. Sampel yang digunakan dalam penelitian ini adalah 47 responden. Data diperoleh dari hasil penelitian, diolah dengan menggunakan analisis data dan menggunakan aplikasi SPSS 28, yang terdiri dari uji validitas dan reliabilitas, teknik analisis data deskriptif, dan analisis inferensial. Hasil penelitian menunjukkan bahwa indikator yang digunakan pada setiap variabel tersebut menunjukkan bahwa pengaruh penggunaan video conference terhadap motivasi belajar mahasiswa pada mata kuliah Mesin Listrik 2 berada pada kategori baik. Berdasarkan uji korelasi sebesar 0,530 berada pada interval 0,40-0,599 yang berarti bahwa terjadi hubungan yang cukup diantara kedua variabel tersebut. Berdasarkan hasil data yang diperoleh R2 sebesar 28,1% sedangkan 71,9% dipengaruhi oleh faktor lain yang tidak terdapat pada penelitian ini. Sehingga dapat disimpulkan bahwa terdapat pengaruh penggunaan video conference terhadap motivasi belajar mahasiswa pada mata kuliah Mesin Listrik 2 Jurusan Pendidikan Teknik Elektro Universitas Negeri Makassar.
PENGARUH PENGGUNAAN GAME ONLINE MOBILE LEGENDS TERHADAP LAMA STUDI MAHASISWA FAKULTAS TEKNIK UNIVERSITAS NEGERI MAKASSAR
Authors: Mappeasse Muhammad Yusuf , Firdaus Firdaus , Asis Fikri
Published: September 2023

Penelitian ini bertujuan untuk mengetahui: (1) Intensitas penggunaan game online Mobile Legends pada mahasiswa angkatan 2017 Fakultas Teknik Universitas Negeri Makassar, (2) Lama studi mahasiswa angkatan 2017 Fakultas Teknik Universitas Negeri Makassar yang bermain game online Mobile Legends, dan (3) Pengaruh penggunaan game online Mobile Legends terhadap lama studi mahasiswa Fakultas Teknik Universitas Negeri Makassar. Penelitian ini merupakan penelitian kuantitatif. Sampel penelitian sebanyak 95 mahasiswa dari angkatan 2017 Fakultas Teknik Universitas Negeri Makassar yang bermain game online Mobile Legends.  Data penelitian diperoleh dari kuisioner dan dokumentasi adapun teknik analisis data yang digunakan adalah analisis statistik deskriptif, uji normalitas, uji linearitas dan uji hipotesis menggunakan analisis regresi linier sederhana. Berdasarkan pembahasan dan hasil penelitian yang telah dilakukan dapat disimpulkan bahwa: (1) intensitas penggunaan game online Mobile Legends mahasiswa Fakultas Teknik Universitas Negeri Makassar masuk dalam kategori Tinggi, (2) lama studi mahasiswa Fakultas Teknik Universitas Negeri Makassar yang menggunakan game online Mobile Legends masuk dalam kategori sangat lama, (3) Terdapat pengaruh positif dan signifikan intensitas penggunaan game online Mobile Legends (X) terhadap lama studi (Y) mahasiswa Fakultas Teknik Universitas Negeri Makassar. Dengan demikian dapat disimpulkan bahwa, semakin tinggi intensitas bermain game online Mobile Legend maka akan semakin lama studi mahasiswa angkatan 2017 Fakultas Teknik Universitas Negeri Makassar
EFEKTIVITAS MODEL PEMBELAJARAN TWO STAY TWO STRAY (TSTS) DALAM PENCAPAIAN HASIL BELAJAR MAHASISWA
Authors: Ashari Hilda , Vitalocca Dyah
Published: September 2023

Penelitian ini bertujuan untuk mengetahui efektivitas penerapan model pembelajaran Two Stay Two Stray (TSTS) terhadap pencapaian hasil belajar mahasiswa pada mata kuliah strategi belajar mengajar Jurusan Pendidikan Teknik Elektro Fakultas Teknik Universitas Negeri Makassar. Desain Penelitian yang dilakukan menggunakan Quasy Experiments, dengan sampel 65 orang mahasiswa. Instrumen diberikan dalam bentuk observasi dan tes. Berdasarkan data yang diperoleh dari hasil penelitian yang dilakukan menunjukkan bahwa ada perbedaan yang signifikan antara hasil belajar pada mata kuliah strategi belajar mengajar yang menerapkan model pembelajaran tipe Two Stay To Stray (TSTS) dengan penerapan model pembelajaran konvensional. Berdasarkan hasil analisis Uji T yang diperoleh melalui Independent Sample Test menghasilkan nilai yang signifikan 0,000<0,005. Dari hasil tersebut kemudian dapat disimpulkan bahwa hasil belajar kelas eksperimen lebih baik daripada hasil belajar kelas kontrol, sehingga model pembelajaran Two Stay To Stray (TSTS) lebih efektif daripada model konvensional.
Implementation of Wordwall as a Learning Media to Improve Students' Writing Skill
Authors: Amri Faisal , Sukmaningrum Rahmawati
Published: September 2023

This study examines the effectiveness of Wordwall as a learning media in enhancing the writing skill of students. The Wordwall is an innovative and interactive tool that utilizes technology to engage students in writing activities. A review of related literature suggests that Wordwall as a learning media has been successfully implemented in various contexts to enhance students' writing skill. This study utilized a pre-experimental design known as a one-group pretest-posttest design. This design involved a single group of participants who underwent two measurements: a pretest was conducted prior to the intervention and then followed by a posttest. By comparing the participants' performance on the pretest and posttest, the study aimed to evaluate the impact of the intervention on the measured variable. The results showed that the group taught using Wordwall had a significant improvement in their writing skill. The results of this study have practical implications for language teachers to consider using Wordwall as a learning media to enhance their students' writing skill.
The effect of MgNPs synthesized by using green method on the produc-tion and proliferation of Capisum annuum callus culture In Vitro
Authors: Hadi Sabah Mahdi , Rashed Maad Abdalmonem
Published: September 2023

Nanotechnology, consider as one of the newest important methods towards improve the production of callus using plant tissue culture. The objective of the current work was to create a unique callus induction methodology. and proliferation from Capisum annum in vitro. Therefor different concentrations of Mg nanoparticles were used which synthesized using green method. For callus inducement, young foliage, and stem from the sterile germinated seedlings using Sodium hypochlorite (NaOCL) 6% for 10 min were used as explants. They were cultivated in MS media supported by several combinations of kinetin and 2, 4- Dichlorophenoxyacetic. The maximum percentage responsive reached 100% from leaf explants at 2, 4-D 1.5 mg/L and Kin 1.0 mg/L. While 2, 4-D 1.5 mg/L and Kin 0.5 mg/L achieved the highest fresh weight for callus proliferation. The best MgNPs concentration for callus inducement and proliferation of capsicum leaves and stem explants was MS media supported with 1.0 and 0.3 ml/L respectively. While the highest proliferation mean value for callus was recorded at the concentration of 6.0 ml/L MgNPs in MS medium reached 6.1 gm. AFM photographs prove that MgNPs were in nanometer size and had the spheres and the rods shape. The average grain size of the MgNPs was 23.8 to 38.24 nm.
Effect of Aloe vera extract on some parameter liver functions changes and complete blood count induced by Azathioprine in male rats
Authors: Al-Hasnawi Ahmed , Jasim Wafaa Kadhim
Published: September 2023

The present study aimed to reveal the biological vitality of the immune suppressant medicine azathioprine (AZA), which has been used to treat immunological illnesses like acute lymphoblastic leukemia (ALL), inflammatory bowel disease, and organ transplants, successfully lowers immune reactivity for liver and bone marrow. The goal of the current study was to evaluate the preventive effects of Aloe Vera extract in treating hematological and biochemical side effects brought on by azathioprine. Have been selected There were four groups of adult male rats. A mixture of azathioprine (50 mg/kg) and Aloe Vera (500 mg/kg) was given to group 4 in addition saline that group 1 received. Group 2 received azathioprine (50 mg/kg) orally for during a 30 days period. The findings show that azathioprine significantly reduced blood test results (RBC , WBC , PCV). While AST and ALT levels significantly increased in the biochemical test  in contrast to the control group , Conclusions the Hepatotoxicity, or liver damage from immunosuppressive medications like azathioprine, is a possible side effect and Due to the damage that has happened to the hepatic tissue, the enzymes that assess the activities of the liver are raised.
Evaluation the efficacy of Ethanol Extract Derived from Wild Mint on the Life Parameters of the Aphis fabae (Hemiptera: Aphididae) (Sco-poli) under laboratory conditions
Authors: Al ouboodi Amal Shkhair Younus , Mohammed Akram Ali
Published: September 2023

The black bean aphid, Aphis fabae is a significant economic pest with a global presence, impacting a wide range of plant species. This study aimed to assess the effectiveness of ethanol extract derived from wild mint (Mentha longifolia) under laboratory conditions on various life performance criteria of A. fabae. The evaluation involved measuring mortality rates of nymphs and adults, as well as adult productivity, utilizing three different extract concentrations (1%, 2%, and 3% w/v). The results revealed that the ethanol extract of plant leaves had a substantial effect on all life stages of the aphid, with a more pronounced impact observed at higher concentrations and longer exposure periods. In the first nymphal instar, the mortality rate reached 81% at a concentration of 3%, and in the second nymphal instar, it was 80% at the same concentration. For the third and fourth nymphal instars, the mortality rates were 82% and 82.5%, respectively, at a concentration of 3%. As for adult aphids, the mortality rate was 81.333% at a concentration of 3%. Moreover, the extract significantly reduced the productivity of adult aphids, with rates of 1.68%, 1.82%, and 1% at concentrations of 1%, 2%, and 3%, respectively.
Response of growth, yield and quality of maize to the fertilizer combi-nation of nitrogen and potassium and spraying with the potassium humate
Authors: Aljoubory Sammar.K.H. , Al-Yasari Mahmood N. Hussein
Published: September 2023

The split-plot experiment was carried out in one of the agricultural fields- Al-Hussainiya district in the holy city of Kerbala for the fall season 2022, by planting the maize, Sumer cultivar was planted in          a soil with clay loam texture. The experiment comprising two factors, and the first factor was the combinations of different levels of nitrogen (0, 150 and 300 kg N ha-1) were identified with symbols, N0, N1, and N2, respectively, Three levels of potassium (0, 80 and 160 kg K ha-1) were symbolized as K0, K1, and K2, respectively, the second factor was spraying with the organic nutrient potassium humate at two concentrations (1 and 2) g L-1, the concentrations of potassium humate were occupied the main plots, while the fertilizer combinations of nitrogen and potassium filled the sub plots with three replications according to the randomized complete block design (RCBD).The results showed  a significant effect of adding fertilizer combinations of nitrogen and potassium and spraying with the organic nutrient potassium humate    (2 g L-1) individually and overlapping in most growth, yield and quality traits, as the overlapping showed a significant superiority in increasing of leaf area (cm2 plant-1), stem diameter (mm), leaf chlorophyll index (SPAD unit), ear weight (g), plant yield (g plant-1) and protein yield (g plant-1), the interaction between the two study factors contributed to reducing the amount of mineral fertilizer to 50%, as there was no significant difference between the fertilizer combinations of nitrogen and  potassium (150N + 80K) and (300N + 160K) Kg ha-1, with  a concentration of 2 gmL-1 of potassium humate.
The effect of biochar and extract of organic fertilizer on the readiness of certain elements in the soil
Authors: Jalal Hawra Naim , Haloul Rahim Alwan
Published: September 2023

A field experiment was conducted at the second research station of the College of Agriculture, Al-Muthanna University, using a mixed soil. The objective of the study was to investigate the impact of varying quantities of biochar and organic fertilizer extract on the availability of nitrogen (N), phosphorus (P), potassium (K), iron (Fe), and zinc (Zn) elements in the soil.The experimental design encompassed the incorporation of four distinct biochar levels (A0, 0%), (A1, 1.5%), (A2, 2%), and (A3, 2.5%), which were applied proportionally to the soil volume. Additionally, four levels of organic fertilizer extract (0, 20, 40, and 80) liters per hectare (B0, B1, B2, and B3) were implemented. A factorial experiment was employed inside a randomized complete block design (RCBD) framework, consisting of three replications.The means were subjected to a Least substantial Difference (LSD) test at a significance threshold of 0.05. The findings indicated substantial disparities between the application of biochar and organic fertilizer extract, as well as their interaction, in relation to the levels of accessible nitrogen in the soil.Moreover, notable disparities were observed regarding the incorporation of biochar and organic fertilizer extract in relation to the accessibility of phosphorus within the soil. Furthermore, the introduction of biochar and organic fertilizer extract, as well as the interplay between these two factors, exhibited a substantial impact on the availability of potassium within the soil. Furthermore, the use of charcoal and organic fertilizer extract had a notable impact on the accessibility of iron and zinc within the soil.
The effect of nano-foliar spraying with G-Power calcium, organic fer-tilizer, and spraying stages on the growth and yield of maize (Zea mays L.)
Authors: Al-Kraiti Haider Ghatar Aswad , Hadi Zaidoun Saad Chiyad , Muhammad Nawras Jassim
Published: September 2023

A field experiment was conducted at Ibn Al-Bitar Vocational Preparatory School in the Al-Husseiniyah District, located in the northern region of Karbala Governorate. The experiment took place during the spring season of 2022 AD. The objective of the study was to investigate the impact of various concentrations of G-Power ca and spraying dates on the growth and yield of maize. The experimental design employed was a randomized complete block design (RCBD) arranged in a factorial order with three replications. The first factor examined was the different concentrations of the nano fertilizer G-Power ca, specifically at levels of 0, 2, 4, and 6 ml L-1. The second component encompassed three distinct time points for foliar application: spraying at 20 days post-planting, spraying at 40 days post-planting, and spraying at 60 days post-planting. The findings of the study indicate that the application of nano-foliar spraying of G-Power ca at a concentration of 6 ml L-1, two months after planting, resulted in considerably improved outcomes compared to other treatments. This treatment exhibited the highest average values for the characteristics under investigation. Each of the variables in the study possesses distinct characteristics, including plant height (measured in centimeters), leaf area (measured in square centimeters), average number of leaves per plant (measured as leaf.plant-1), average percentage of chlorophyll in the leaves (measured as spad), and total plant yield (measured in kilograms per hectare, denoted as kg.ha1-). These variables were observed and recorded in a sequential manner, with corresponding values of 183, 4209, 14.50, 44.67, and 8012, respectively. Therefore, it can be inferred that the utilization of nano-fertilizer has a major impact on the vegetative characteristics of Maize, resulting in a notable enhancement of the aforementioned qualities
Understanding The Knowledge, Beliefs, And Practices Of Samareños On Red Tide Phenomenon: Implications For Sustainable Management
Authors: Dr. Edelyn O. Echapare,  , Dr. Rezy V. Mendaño,  , Dr. Abigail M. Cabaguing,  , Myrniel B. Gal,  , Emma Q. Tenedero,  , Maria Rubi M. Parrocho,  , Maria Angelica F. Alcantara
Published: September 2023

This study examines how factors like age, gender, marital status, education, household size, income, and occupation impact what people know and believe about red tide and how they respond to it. We collected data from people in Samar to understand this. We found that some factors, like income and marital status, are linked to a better understanding of red tide. However, factors like age, gender, household size, occupation, and education don't seem to make a big difference.We used a mix of methods, including numbers and discussions with groups of people. These discussions brought up important ideas, like the need for fair support for all groups affected by events like red tide, cooperation between local government and agencies, and better public education about red tide. This shows that working together, giving help when it's needed, and making informed choices are key to dealing with red tide.This study helps us understand how demographics affect what people know and do about red tide. It gives us ideas for ways to help people deal with red tide better. We suggest more research to understand why some factors matter more than others and how we can use these ideas to improve how we respond to red tide.
Eradication Of Corruption By Tracing Money Laundering As An Integral Legal System That Can Not Be Separated
Authors: Sitompul Ariman
Published: September 2023

Money laundering can undermine the national economy because it is closely related to confidence of a person or another state in the policy of the state. Money laundering is usually done by mixing illicit money with legitimate money so that legitimate businesses will be less competitive with honest companies, undermine the integrity of financial markets because financial institutions (financial institutions) even those that rely on proceeds of crime can face liquidity dangers; resulting in loss of government control of a country's economic policy resulting lack of confidence of other countries in the policies of the country's government.So that in an effort to eradicate the money laundering and criminal acts such as corruption origin is a unity that can not be separated to combat the evidence system is not clear, not balanced proof techniques and mafia Justice.
Sosialisasi Aplikasi MHS (Mental Health Solution) Dalam Mengatasi Kesehatan Mental
Authors: Surya Nella Tri , Gita Anggi Putri Aria , Kur’aini Sri Nurul
Published: September 2023

Masalah kesehatan jiwa telah menjadi masalah kesehatan yang belum terselesaikan di tengah-tengah masyarakat, baik di tingkat global maupun nasional. Terlebih di masa pandemi COVID-19, permasalahan kesehatan jiwa akan semakin berat untuk diselesaikan. Mental Health adalah terhindarnya seseorang dari gejala-gejala gangguan dan penyakit jiwa, dapat menyesuaikan diri, dapat memanfaatkan segala potensi dan bakat yang ada semaksimal mungkin dan membawa kepada kebahagiaan bersama serta tercapainya keharmonisan jiwa dalam hidup. tujuan sosialisasi ini adalah memberikan informasi dan pemahaman kepada seluruh tenaga kesehatan tentang Aplikasi Mental Health Solution dalam mengatasi kesehatan mental dan memberikan pemahaman tentang cara penggunaannya. Manfaat kegiatan ini diharapkan mampu menambah pengetahuan dan pemahaman masayarakat tentang penggunaan Aplikasi Mental Health Solution dalam mengatasi kesehatan mental.
Pemberdayaan Dasawisma Pada Praktik Pembuatan Olahan Daun Katuk Dalam Peningkatan Produksi ASI Pada Ibu Hamil dan Ibu Nifas Sebagai Upaya Penanggulangan Stunting di Desa Meranti Kabupaten Bonebolango
Authors: Maesarah Maesarah , Paramata Yeni , Dengo Moh. Rivandi , Junus Dikson , Rahmawati Rahmawati , Adhayani Zul , Ramadhani Firdausi , Hatta Herman , Adam Deysi , Kau Mayangsari
Published: September 2023

Stunting adalah Keadaan stunting pada balita dapat dinilai dengan indikator TB/U (Tinggi badan menurut umur) dengan nilai z score dari -3 standar deviasi sampai kurang dari -2 Standar deviasi. Beberapa faktor yang dapat menyebabkan stunting seperti pengetahuan ibu, BBLR (Berat Badan Lahir Rendah), faktor sosial ekonomi dan pemberian ASI Eksklusif. Data Dinas Kesehatan Kabupaten Bonebolango Tahun 2021 cakupan ASI Eksklusif pada usia 0-6 bulan sebesar 45,80% sedangkan data trimester pertama tahun 2023 sebesar 70% bayi tidak mendapatkan ASI EKSlusif di desa Meranti. Tujuan Pengabdian ini adalah menambah pengertahuan ibu dan dasawisma terkait tatacara pengolahan duan katuk sehingga dapat meningkatkan volume ASI ibu. Jumlah sasaran dari pengabdian ini adalah dasawisma dan seluruh ibu nifas dan ibu hamilyang ada didesa meranti. Kegiatan pengabdian masyarakat ini dengan tahapan memberikan edukasi oleh narasumber dan dilanjutkan dengan kegitan praktik pengolahan berbahan dasar daun katuk, selanjutnya para dasawisma yang telah dilatih akan menlakukan evaluasi terhadap para ibu nifas terkait peningkatan volume asi dari makanan berbahan dasar katuk yang telah mereka olah sendiri. Pada tahapan terakhir pengabdian masyarakat dilakukan pemilihan duta ASI yang dapat dijadikan sebagai fasilitator dalam pemantuan cakupan ASI di Desa Meranti Kec. Tapa Kabupaten Bonebolango, setiap bulan.
Strategic Management Accounting and Financial Performance of Small and Medium Manufacturing Enterprises in Nairobi City County, Kenya
Authors: Mbogo Marion , Olando Clement , Macharia Jimmy
Published: September 2023

Previous studies acknowledge that small and medium-sized enterprises (SMEs) are key drivers to Kenya's economic development. Many of these SMEs face persistent constraints and do not realize their full potential, with many failing within their first three years of operation. A possible cause for the high failure rate is poor financial performance. Existing literature highlights one remedy as the use of strategic management accounting practices. This paper investigated the influence of strategic management accounting practices (SMAPs) on the financial performance of small and medium manufacturing enterprises (SMMEs) in Nairobi City County, Kenya. The study used self-reporting opinion questions on Return on Investments (ROI), Return on Assets (ROA), operating profit and net profit margin as financial measures. A descriptive research design was used. Target population was 693 SMMEs in Nairobi City County.  Data was collected through a self-administered cross-sectional survey. Survey questionnaires were administered to a representative sample of 254 SMMEs with 156 usable responses. Data was analyzed using structural equation modelling to explain the relationships among multiple variables for SMAPs and financial performance. Results of hypothesis testing revealed that SMAPs significantly influence financial performance (chi-square (χ2) = 612.82, DF = 171, p-value = 0.000, CMIN/DF (x2 /df = 3.584, RMSEA = 0.114, IFI= 0.857, CFI= 0.856, NFI= 0.819, GFI =0.806, AGFI=0.751), where the model explains 43.7% in the variations on financial performance of SMMEs. Results suggest that the financial performance of SMMEs can be improved by deploying SMAPs.  The study recommends that SMMEs should be encouraged to adopt SMAPs through policy and practice.
Analisis Efektivitas Peran Balai Latihan Kerja (BLK) di Kabupaten Sambas
Authors: Azhar Muhammad , Januri
Published: September 2023

Kabupaten Sambas merupakan salah satu wilayah di Indonesia yang memiliki potensi sumber daya manusia yang besar, namun seringkali menghadapi tantangan dalam menghadirkan lapangan kerja yang memadai bagi penduduknya. Untuk mengatasi hal ini, pemerintah daerah dan berbagai pihak terkait telah melibatkan Balai Latihan Kerja (BLK) sebagai salah satu lembaga yang bertugas memberikan pelatihan dan keterampilan kepada masyarakat. Penduduk Kabupaten Sambas mengalami kenaikan yang signifikan sejalan dengan jumlah pemuda dan pencari kerja yang kian meningkat. Tujuan penelitian ini adalah untuk menemukan data dan informasi mengenai mengenai dampak pelatihan terhadap efektivitas peran BLK pelatihan di UPTD Balai Latihan Kerja Dinas Sosial Tenaga Kerja dan Transmigrasi Kabupaten Sambas. Penelitian ini menggunakan metode kualitatif dengan menggunakan data primer berupa hasil wawancara dan data Primer yaitu hasil wawancara dari kantor BLK di Kabupaten Sambas mengenai Efektivitas Peran BLK di Kabupaten Sambas Jenis penelitian ini menggunakan jenis penelitian lapangan. Dari hasil penelitian ini diperoleh hasil bahwa tidak semua pelatihan yang ada di kantor BLK Kabupaten Sambas itu berjalan efektif.
Analisis Efektivitas Program Keluarga Harapan untuk Mengentaskan Kemiskinan di Desa Lumbang Dusun Penyengat Kecamatan Sambas
Authors: Novianti  , Sari Nur Indah
Published: September 2023

Program Keluarga Harapan (PKH) merupakan salah satu bantuan yang ditujukan kepada masyarakat miskin dengan fokus untuk pendidikan, kesehatan, dan kesejahteraan yang bertujuan untuk mengentaskan kemiskinan. Program ini merupakan bantuan tunai bersyarat, dimana penerima program ini akan menerima bantuan tunai apabila sudah memenuhi syarat dan kewajibannya. Dalam jangka panjang, PKH bertujuan untuk memutus rantai kemiskinan yang dapat dicapai melalui peningkatan sumber daya manusia yang ada. Penelitian ini menggunakan metode mixed method, yang artinya metode kombinasi atau gabungan antara pendekatan kualitatif dan kuantitatif dengan teknik wawancara dan penyebaran kuesioner. Peneliti menggunakan teknik pengumpulan sampel dengan menggunakan rumus slovin dan diperoleh sampel sebanyak 27 responden dari 68 orang. Dalam menganalisis data, peneliti menggunakan analisis deskriptif dari data yang telah dikumpulkan. Efektivitas Program Keluarga Harapan (PKH) diukur menggunakan tiga indikator efektivitas yaitu indikator input, indikator proses, dan indikator output. Dari ketiga indikator tersebut, tingkat efektivitas Program Keluarga Harapan (PKH) di Desa Lumbang Dusun Penyengat sangat efektif.
Peran Wali Kelas untuk Meningkatkan Motivasi Belajar Siswa di MA Miftahul Ulum Langkaplancar
Authors: Hidayatulloh Arlan , Gunawan Anggun , Saputra Yudi
Published: September 2023

Motivasi belajar artinya dorongan dari dalam diri siswa itu sendiri untuk mencapai tujuan belajar. Dalam motivasi terkandung adanya keinginan, harapan, tujuan, sasaran, dan insentif. Dengan adanya motivasi maka siswa akan senantiasa semangat dalam proses pembelajaran dan siswa juga tidak akan merasakan adanya paksaan dari pihak manapun. Adapun masalah yang peneliti temukan di MA Miftahul Ulum Langkaplancar yaitu kurangnya minat dan motivasi peserta didik terhadap pembelajaran. Penelitian ini menggunakan metode penelitian kualitiatif yang bertujuan untuk menjelaskan suatu fenomena dengan mendalam dan dilakukan dengan mengumpulkan data sedalam-dalamnya. Adapun upaya yang dapat diterapkan di MA Miftahul Ulum Langkaplancar untuk meningkatkan motivasi belajar siswa diantaranya: 1) Memberikan angka/nilai, 2) Memberikan hadiah, 3) Kompetisi persaingan, 4) Menumbuhkan kesadaran siswa akan pentingnya tugas, 5) Memberi ulangan, 6) Memberitahu siswa hasil belajarnya, 7) Memberikan pujian, 8) Memberikan hukuman.