bluuebunny/crossref_metadata_2025 huggingface dataset:
PENGARUH TEMPERATUR TINGGI TERHADAP KUAT LEKAT DAN INITIAL CORROSION TULANGAN BAJA DALAM BETON
Authors: Ngudiyono Ngudiyono , Merdana I Nyoman , Mahmud Fathmah , Kencanawati Ni Nyoman , Eniarti Miko
Published: July 2023

Kebakaran pada gedung beton bertulang, menyebabkan kualitas beton mengalami penurunan, hal ini disebabkan karena jumlah pori-pori kosong dalam beton semakin bertambah. Pori-pori kosong memudahkan air meresap ke dalam beton dan jika air tersebut mengandung asam, basa dan senyawa klorida akan menyebabkan terjadinya korosi pada tulangan baja di dalam beton. Penelitian dilakukan dengan ekperimental. Tulangan baja diamter 10 mm ditanam di dalam beton berbentuk kubus ukuran 100 x 100 x 100 mm sepanjang 50 mm dengan variasi kuat tekan 17.5 MPa, 20 MPa dan 30 MPa. Setelah benda uji mencapai umur 28 hari, benda uji dibakar pada suhu sekitar 4000C selama 1 jam menggunakan tungku pembakaran. Untuk mempercepat proses korosi, benda uji direndam di air yang telah ditambahkan NaCl sebesar 5% selama 24 jam dan dialiri arus DC sebesar 12 Volt. Uji korosi dengan metode half cell potential dengan cara mengukur beda potensial dengan Multitester. Selanjutkan dilakukan pengujian tegangan lekat dengan uji pull out. Hasil penelitian menunjukkan bahwa, akibat temperatur tinggi 4000C, menyebabkan penurunan tegangan lekat tulangan baja dalam beton dengan kuat tekan (f’c) 17.5 MPa, 20 MPa, 30 MPa berturut-turut sebesar 69.09%, 64.07%, 62.02% atau rata-rata 65.07% dibandingkan beton prabakar. Hasil pengujian korosi menunjukan bahwa initial corrosion tulangan baja dalam beton prabakar maupun pascabakar memiliki tingkat resiko korosi 90% atau tinggi karena beda potensial untuk semua benda uji < -350 mV. Akan tetapi jika dilihat dari beda potensial, tulangan baja dalam beton pasca bakar lebih rendah daripada beton prabakar, kecuali beton dengan kuat tekan 30 MPa.
BIAYA, PENYEBAB DAN MANAJEMEN RISIKO LOKASI BLACKSPOT DI RUAS TOL JATI LUHUR ITC - PADALARANG BARAT KM 84 - KM 120+500
Authors: Yunistra Guntur Galatika , Purba Humiras Hardi , Dwiatmoko Hermanto
Published: July 2023

Kecelakaan lalu lintas di jalan tol Purbaleunyi terus berulang, khususnya ruas tol Jati Luhur Itc. - Padalarang Barat (Km 84 s.d Km 120+500) yang mengakibatkan banyak korban. Timbul pertanyaan faktor apa saja yang mempengaruhi terjadi nya kecelakaan tersebut. Tujuan penelitian ini mengetahui penyebab, karakteristik, biaya kecelakaan dan memberikan rekomendasi manajemen risiko keselamatan jalan untuk mengurangi kecelakaan pada lokasi Blackspot. Penelitian ini berdasarkan hasil survei lapangan, penggalian informasi para pihak terkait dan data kecelakaan 10 tahun terakhir (tahun 2012 - Juni 2021) sumber Representative Office 3, PT Jasa Marga (Persero) Tbk. Analisis data menggunakan metode AEK, BKA dan UCL untuk menentukan lokasi rawan kecelakaan. Analisa data untuk mencari keterkaitan antar variabel berpengaruh dengan metode analisis regresi linear berganda program komputer SPSS. Menghitung kerugian akibat kecelakaan metode The Gross Output (Human Capital). Hasil penelitian untuk lokasi Blackspot di ruas Jati Luhur Itc. - Padalarang Barat pada jalur A dan jalur B terdapat 13 lokasi. Kecelakaan tunggal dominan kecelakaan sendiri dan kecelakaan ganda adalah tabrakan depan-belakang. Jenis kendaraan yang banyak terlibat adalah non golongan I (mini bus, truk berat/tronton dan medium truk). Waktu kejadian dominan terjadi pukul (00.00-06.00) dan (18.00 - 24.00), pada hari kerja dan cuaca cerah. Faktor penyebab utama adalah manusia yaitu mengantuk dan kurang antisipasi pengemudi dan faktor kendaraan ban pecah. Besaran biaya kecelakaan dari tahun 2012 s.d. Juni 2021 adalah Rp 182.574.325.950. Manajemen resiko penanganan lokasi Blackspot melalui penegakan hukum terhadap tindak pidana lalu lintas, memasang alat pengendali kecepatan, memasang perambuan, pengecekan kelayakan kondisi kendaraan dan membuat jalur penyelamat.
FAKTOR PENGARUH VARIATION ORDER PADA KONSTRUKSI JALAN DAN JEMBATAN UNTUK MENGURANGI KLAIM KONSTRUKSI
Authors: Kustiah Heni , Hardjomuljadi Sarwono , Amin Mawardi
Published: July 2023

Proyek konstruksi dalam pelaksanaannya selalu terjadi perubahan lingkup pekerjaan, perubahan jenis material, perubahan spesifikasi teknis, perubahan waktu pelaksanaan pekerjaan dan keinginan pemilik proyek untuk melakukan penambahan ataupun perubahan lingkup pekerjaan. Variation order/perintah perubahan adalah pekerjaan tambah/kurang yang selalu terjadi dalam setiap pembangunan proyek konstruksi dan hal ini dapat menjadi penyebab terjadinya klaim konstruksi dan sengketa apabila tidak ditangani secara baik. Dengan adanya klaim konstruksi yang berakhir dengan sengketa dapat mengakibatkan gagalnya tujuan utama proyek yaitu menciptakan produk fisik dalam jangka waktu tertentu (ada awal dan akhir) yang terikat dengan biaya dan mutu yang sudah disyaratkan. Penelitian ini bertujuan mencari faktor-faktor yang dapat menyebabkan timbulnya variation order, untuk menghindari klaim konstruksi yang berakhir sengketa, mencari faktor yang paling berpengaruh yang dapat menyebabkan timbulnya variation order untuk menghindari klaim konstruksi yang berakhir sengketa. Analisis data menggunakan regresi linier berganda dengan IBM SPSS v 25. Hasil dari penelitian adalah faktor-faktor yang dapat menyebabkan timbulnya variation order adalah perubahan kuantitas, perubahan kualitas, perubahan desain, perubahan program kerja dan perubahan metode kerja. Sedangkan faktor yang signifikan berpengaruh yang dapat menyebabkan timbulnya variation order untuk mengurangi klaim konstruksi yang berakhir sengketa adalah perubahan metode kerja.
Impact of Extraction Solvent Polarity: Antioxydant Activity of Methanolic, Hydromethanolic and Aqueous Decocted Extracts of Algerien Thymelaea hirsuta (L.) Endl. Areal Parts
Authors: Ounis Roumissa , Benchikh Fatima , Amira Smain , Benabdallah Hassiba , Amira Hind , Mamache Walid , Bensouici Chawki , Hellal Khaoula
Published: July 2023

Thymelaea hirsuta (L.) Endl. , known as ‘Methnane’ in Algeria, is a widely medicinal plant used in folk medicine. In the present study, In vitro antioxidant activity of T. hirsta extracts and the impact of extraction solvent polarity on the antioxidant potential were investigated. Three types of polar solvents with decreasing polarity were chosen; water for decocted extract, methanol-water at 50% and absolute methanol for macerated extracts. Total phenolic and flavonoid contents were evaluated and showed a high amount wihch decreases with increasing polarity. Antioxydant activity was assessed with different methods: ABTS assay for evaluation of scavenge activity, CUPRAC and reducing power for assessement of the reduction potential of T. hirsuta areal parts. The results showed that T. hirsuta areal parts exhibited a strong scavenging activity with significant difference between extracts in terms of their polarity. In the same line, the most polar aqueous decocted extract exhibited a considerable reducing activity followed by hydromethanolic and methanolic extract with increasing potential. These findings suggest the suitability of polar solvents for the extraction of phytochemical compounds from T. hirsuta areal parts and so, their antioxidant activity against several radicals and ions.
Junction zone structure of the Sarmatia, Volga-Uralia, and Fennoscandia microcontinents as part of the East European Platform basement
Authors: Kheraskova T. N. , Volozh Yu. A. , Antipov M. P. , Bykadorov V. A. , Patina I. S. , Saposhnikov R. B.
Published: July 2023

Research subject. The structure of the pre-Paleozoic deposits and different-age Precambrian basement of the East European platform based on geological and geophysical data.

Aim. To trace the evolution of the area under study and to study the geodynamics of processes in order to reconstruct the paleostructure of the Baltica continent.

Materials and methods. The current state of the consolidated crust was studied using a geological interpretation of seismic profiling data (transects: “EB-1”, “Tatseys”, “Magnit”) and materials of gravity and geomagnetic surveys. The material composition of the basement rock complexes was studied based on drilling data.

Results. The Baltica continent forms the basement of the modern East European Platform. After the Sveconorwegian folding about 1000 Ma, Baltica had become part of the Rodinia supercontinent and merged with the North American platform. A passive continental margin with the Riphean-Vendian sedimentary cover was formed on the eastern Baltica edge. The Petrozavodsk-Khopersky orogen, which arose in the place of the Karelian (Early Proterozoic) Petrozavodsk-Khopersky paleoocean, was reconstructed. The submeridional suture was a result of this paleoocean closure. The orogen structure, as well as that of the paleocontinent Baltica, was disturbed and partially destroyed by subsequent tectonic processes, which continue at the present time with modern rifting.

Conclusions. The closure of the Petrozavodsko-Khopersky paleoocean led to the formation of the Baltica continent, which included three microcontinents – Sarmatia, Fennoscandia and Volga- Uralia. Baltica became part of the Rodinia supercontinent during the Sveconorwegian orogeny. Volga-Uralia was located on the border with the PaleoPacific and had a Late Riphean sedimentary cover of the Rodinia supercontinent. This margin underwent destruction during a collision with the Timanides. The scale and extent of the reconstructed Petrozavodsk-Khopersky orogen is comparable to Paleozoic orogenic belts, such as Cadomides, Caledonides, Variscides, or Timanides.
New Data on Carboniferous Deposits in the Southern Part of the East-Timan Megaswell
Authors: Ponomarenko E. S. , Ivanova R. M. , Beznosov P. A.
Published: July 2023

Research subject. Lower Pennsylvanian deposits exposed by mine excavations in the watershed part of South Timan.

Materials and methods. The research material included data obtained by a field description of sections and an optical microscopy analysis of rock samples (26 specimens). For micropaleontological analysis, oriented thin-sections (97 specimens) were additionally prepared. Trace fossil taxa were determined based on both field photographs and collected specimens. Four oriented rock samples were used to determine the phase composition of the clay fractions from diffraction patterns.

Results. The rocks of the Askynbashian (2.7 m), Tashastian (1.4 m), and Akavasian (2.5 m) Regional Stages of the Bashkirian Stage are exposed in the Ikhnitovyi quarry, and the Upper Vereiskian deposits of the Moscovian Stage (1.9 m) are exposed in the Vyemka section. The Ikhnitovyi quarry section exhibits a distinctly cyclic pattern. The cycle bases are distinguished by the appearance of coral and algae limestones, above which thin bedded fine-grained bioclastic and peloidal limestones occur. Greenish illite and chlorite clays indicate shallow sedimentation environments. The carbonate sediments experienced two cementation stages separated by the phase of compaction. The trace fossil assemblage recognized in the Ikhnitovyi quarry characterizes Cruziana ichnofacies. The Vyemka section is of particular interest due to the find of Eofusulina and the presence of typical carbonate tempestites.

Conclusions. The Bashkirian deposits were accumulated under quiet shallow-water conditions (coral and algae limestones), on low-gradient tidal flats (fine-grained grainstones), and under a low hydrodynamic activity (probably low-amplitude tides). The illite and chlorite clays identify the accumulation of aeolian material (clay paticles) in ponds.
Ostracod zonation of the Givetian-Frasnian boundary interval in the Timan-North Urals Region
Authors: Sobolev D. B. , Soboleva M. A. , Evdokimova I. O.
Published: July 2023

Research subject.Ostracods and Givetian-Frasnian boundary deposits of the Timan-North Urals Region.

Materials and methods.The work was based on the results of studying ostracods from the stratotype sections of the Southern Timan, which are considered referential for regional and global correlations. The analysis of the distribution intervals of the most significant taxa was based on the results of previous studies, both published and archival materials on the Timan-Urals Region. Ostracods were considered in association with conodonts, which is an important criterion for applying a reasonable biostratigraphic subdivision. The use of different-scale regional cyclicity of sedimentation and individual “marking” levels of manifestation of global events were shown.

Results.The ostracod distribution in the Givetian-Frasnian boundary interval of the Timan-Northern Urals region was analyzed. The following most significant taxa were identified: Cavellina devoniana, Cavellina uchtensis, Cavellina batalinae, Cavellina chvorostanensis, Nodella faceta, Nodella ex gr. hamata. The correlation of established assemblages with ostracods from the Franco-Belgian basin was shown. The difference consists in the absence of a polyzygid assemblage with Polyzygia beckmanni beckmanni, which was established at the base of the Nismes Formation of Belgium near the historical boundary between the Givetian and Frasnian stages. The determined relationship of biostratigraphic data in combination with the transgressive-regressive sequence of sedimentation shows a more reasonable solution to the problem of the position of the lower boundary of the Frasnian stage of the Upper Devonian in the Timan-Northern Urals Region.

Conclusions.An updated version of the scheme of zonal subdivision of the Givetian-Franian boundary interval in the Timan- Northern Urals region has been developed, taking into account the ostracod distribution of the Cavellinidae and Nodellidae families, as well as the discrepancies in the levels of the first appearance of index species and the boundaries of zones in the regional stratigraphic scheme. The correlation of ostracod zones relative to the conodont scale is shown.
Pengaruh Variasi Jenis Bahan Terhadap Pengurangan Taraf Intensitas Bunyi
Authors: Sandi Dala Novika , Wahyuni Dwiria , Nurhasanah Nurhasanah , Muliadi Muliadi , Hasanuddin Hasanuddin , Nurhanisa Mega
Published: July 2023

Acoustic materials such as plastic carpet, gypsum board, styrofoam and plywood can be used to reduce sound intensity. Nevertheless, the existing research has generally focused on single-ingredient studies. In this research, the optimum thickness of each material will be sought based on its efficiency in reducing the sound intensity level. Besides that, the efficiency of various types of materials will also be tested for reducing the level of sound intensity. In this study, a resonator tube was used in making measurements. Acoustic materials used as test materials, both single materials and combined materials, can be placed in the resonator tube. The distance between the sound source and the detector is 30 cm, with the position of the detector right behind the acoustic material. Tests on a single material show that the measured sound intensity level decreases in proportion to the thickness of the acoustic material, with styrofoam has the lowest efficiency. Meanwhile, the combined material that combines plastic carpet material at a frequency of 2000 Hz has an efficiency value that tends to be higher than the combination of materials without carpet with efficiency >30%. However, at a frequency of 1500 Hz, all combined materials have efficiency values that are not significantly different. All models of material combinations are proven to be able to reduce sound intensity levels compared to single materials. Thus, it can be concluded that the combined material has the potential as an efficient acoustic material.
Prakiraan Intensitas Curah Hujan Menggunakan Metode Fuzzy Logic Berdasarakan Tipe Pola Hujan
Authors: Nurrohman Faqih , Arsyad Muhammad , Susanto Agus , Prasetiyo Adi
Published: July 2023

Indonesia memiliki tiga tipe pola hujan yaitu pola monsunal, pola ekuatorial, dan pola lokal yang berpotensi memberikan dampak yang signifikan terhadap aktivitas penerbangan. Untuk meminimalisir dampak yang tidak diinginkan diperlukan prakiraan intensitas curah hujan menggunakan metode fuzzy logic khususnya di wilayah Medan (pola ekuatorial), Jakarta (pola monsunal), dan Sorong (pola lokal) yang merupakan wilayah dengan penerbangan tersibuk di Indonesia. Penelitian ini menggunakan data dengan rentang waktu 3 jam yang terdiri dari data input seperti K-Index, Precipitable Water, kelembapan relatif lapisan 850 mb, kelembapan relatif lapisan 700 mb, dan kelembapan relatif lapisan 500 mb yang digunakan untuk memprakirakan intensitas curah hujan. Hasil yang didapatkan pada penelitian ini didominasi oleh output tidak hujan dan hujan ringan sedangkan akurasi yang didapatkan pada penelitian ini secara umum diatas 80% dengan wilayah Jakarta merupakan wilayah dengan akurasi tertinggi dibandingkan wilayah Medan dan Sorong.
Monitoring Perubahan Tutupan Lahan di Kota Blitar Berbasis Algoritma Random Forest
Authors: Ali Abdullah
Published: July 2023

Perubahan penggunaan lahan harus dimonitor dan dievaluasi untuk menghindari dampak lingkungan jangka panjang. Penelitian ini bertujuan untuk melakukan monitoring penggunaan/penutup lahan di Kota Blitar menggunakan metode klasifikasi supervised learning Random Forest (RF). Basis data yang digunakan adalah citra satelit LANDSAT dengan multitemporal tahun 2001, 2011, dan 2021 yang diolah menggunakan platform geospasial berbasis cloud Google Earth Engine (GEE). Uji akurasi hasil klasifikasi RF menunjukkan nilai koefisien kappa lebih dari 0,7 sehingga hasil klasifikasi dapat dilanjutkan untuk dianalisis perubahannya. Analisis jarak dari jalan digunakan sebagai faktor pendorong perubahan penggunaan lahan. Pada tiga kecamatan di Kota Blitar, tren luasan jenis tutupan vegetasi selalu menurun dari tahun 2001-2021, terkecuali kecamatan Sukorejo yang mengalami kenaikan 30,84 ha pada tahun 2021. Pada jenis tutupan sawah/perkebunan, hanya Kecamatan Kepanjen Kidul yang mengalami kenaikan pada tahun 2011 sebesar 18,74 ha, namun luasannya berkurang kembali pada tahun 2021 sebesar 5,04 ha. Jenis tutupan lahan terbangun selalu meningkat pada seluruh kecamatan, dengan rata-rata peningkatan sebesar 104,43 ha dalam kurun waktu 2001-2021. Perubahan menjadi lahan terbangun cenderung terjadi pada jaringan jalan utama Kota Blitar dengan radius 500m.
Sistem Identifikasi Pendataan Masyarakat Penerima Bantuan Covid-19 Menggunakan Teknologi Radio Frequency Identification
Authors: Rizgita Husnul Hafifah , Rasyid Rahmat
Published: July 2023

Telah dirancang sebuah prototype sistem identifikasi pendataan masyarakat penerima bantuan Covid-19 menggunakan teknologi Radio frequency identification (RFID). Prototype ini mampu melakukan identifikasi data masyarakat serta melakukan pendistribusian bantuan Covid-19 menggunakan prinsip kerja mirip seperti vending machine dengan menggunakan E-KTP sebagai identitas pengguna untuk mengakses alat. RFID digunakan sebagai sensor yang dapat membaca ID pada E-KTP yang sebelumnya telah didaftarkan oleh admin. Sensor ultrasonik HC-SR04 digunakan sebagai pengganti push button, hal ini bertujuan agar tidak terjadinya penyebaran virus Covid-19 akibat sentuhan dari pengguna. Push button digunakan untuk memberikan perintah kepada motor DC untuk bergerak sehingga pintu penghalang otomatis dapat terbuka. Kemampuan RFID membaca ID pada E-KTP pada jarak optimal yaitu â‰¤ 1 cm, sedangkan sensor ultrasonik HC-SR04 dapat digunakan dengan baik dengan akurasi sebesar 98,95%. Prototype ini menggunakan NodeMCU ESP32 sebagai mikrokontroler yang berfungsi untuk mengontrol dan menyimpan data yang telah terbaca oleh RFID. NodeMCU ESP32 mengirimkan data tersebut ke basis data yang kemudian dapat dilihat melalui halaman website.
Analisis Pergerakan Partikel terhadap Rekaman Mikrotremor di Permukaan Sungai Bawah Tanah Bribin, Kawasan Karst Gunung Sewu
Authors: Nurhanafi Kholis , Zarkasi Ahmad , Intifadhah Sahara Hamas , Wibowo Nugroho Budi , Purnama Aditya Yoga
Published: July 2023

Microtremor has been widely used to determine soil characteristics and dynamics. In this research, particle motion analysis was conducted on 15 microtremor data recordings around the surface of the Bribin Underground River in the Gunungsewu Karst Area. Spectrum analysis was conducted as a basis for determining the frequency range for the particle motion analysis process. Particle motion analysis was only carried out on the horizontal component of the microtremor signal which is expected to provide a representation of the river flow path. The results of particle motion analysis of microtremor recordings in the surface area of the Bribin Underground River show that there are only two points that have a motion-resultant oriented to certain direction, which is perpendicular to the river channel.The points are A4 and B4 which are located in the eastern part of the river flow path.
Analysis of Madden-Julian Oscillation (MJO) on extreme rainfall event in the west coastal south Sulawesi for mitigation disaster
Authors: Matandung Rekun , Sujiono Eko Hadi , Subaer Subaer
Published: July 2023

Madden Julian Oscillation (MJO) is one of the global phenomena that affects weather and climate conditions in Indonesia. MJO increases the rainfall rate and causes a plethora of extreme rainfall occurrences in areas along its trajectory. Those extreme rainfall events could trigger hydrometeorological hazards that endanger the surrounding environment. As the first step to analyse this extreme weather event, this research tries to determine the threshold of the extreme rainfall rate. The method used for determining the threshold is the statistical method 98th percentile. The next step is to identify the frequency trend of the extreme rainfall in the period of 1991 to 2020, by measuring the rainfall rate and comparing it with the normal value. If the rainfall rate is above the normal condition inÂ a certain threshold, then it is considered an extreme rainfall event. After that, these extreme rainfall occurrences are compared to the active MJO phase to find out the influence of MJO to the rainfall in the west coast of South Sulawesi. Then, the dynamical atmospheric conditions are to be analysed during those extreme rainfall events. The result shows that the frequency trend of extreme rainfall events are generally negative in 5 (five) regions, which means an insignificant correlation between MJO andÂ rainfall rate. In contrast, 3 (three) other regions show a positive trend. The influence of an active MJO on the extreme rainfall rate is about 34,1%. Meanwhile, the rest for about 65,9% is influenced by other factors. The use of MJO indices for generating early warning hydrometeorological disasters is by utilising the MJO monitoring data, supported with the analysis of dynamical atmospheric condition in the west coast of South Sulawesi.
Sistem Monitoring Ketinggian Cairan Infus Berbasis Sensor Serat Optik Evanescent
Authors: Nadia Adila , Rasyid Rahmat , Harmadi Harmadi
Published: July 2023

Telah dirancang sistem monitoring ketinggian cairan infus berbasis sensor serat optik evanescent. Sensor serat optik digunakan untuk memonitor ketinggian cairan infus berdasarkan perubahan tegangan keluaran fotodetektor OPT101 terhadap ketinggian cairan infus. Perubahan tegangan keluaran terjadi akibat perubahan intensitas cahaya yang diterima oleh fotodetektor akibat rugi daya pada saat melewati serat optik. Cairan infus yang digunakan yaitu cairan infus NaCl 0,9%. Rancang bangun sistem monitoring ketinggian cairan infus terdiri dari sumber cahaya berupa dioda laser, serat optik FD-620-10 step index multimode, fotodetektor OPT101, mikrokontroler arduino uno sebagai pengolah sinyal dan LCD sebagai penampil kondisi infus. Berdasarkan data pengujian dan analisis yang telah dilakukam maka disimpulkan bahwa rancangan sistem monitoring ketinggian cairan infus berbasis sensor serat optik evanescent telah mampu memonitoring ketinggian cairan infus dengan ketepatan rata-rata 92,73%. Hasil monitoring ketinggian cairan infus diamati dengan 2 kondisi yaitu aman dan awas yang ditampilkan pada LCD, lampu indikator LED dan bunyi pada buzzer.Kata kunci: evanescent, fotodetektor, Â infus, serat optik.
Pemurnian Mangan Oksida dengan Metode Pengendapan Selektif Menggunakan Karbon
Authors: Alamsah Ihsan , Puryanti Dwi
Published: July 2023

Penelitian pemurnian mangan oksida dari bijih mangan Nagari Aie Ramo, Kecamatan Kamang, Kabupaten Sijunjungdilakukan dengan mengunakan metode pengendapan selektif dan adsorbsi. Biji mangan diekstraksi dengan asam sulfat kemudian direduksi dengan asam oksalat dalam suasana asam dan diendapkan dalam larutan NaOH menggunakan media adsorbsi karbon.Karbon yang digunakan berasal dari cangkang kelapa sawit (CKS), cangkang biji karet (CBK), cangkang buah ketaping (CKP), dan tandan kosong kelapa sawit (TKS). Hasil penelitian menunjukkan bahwa karbon cangkang kelapa sawit merupakan karbon yang paling tinggi persen adsorbsinya yaitu 94,225 % dibandingkan dengan sumber karbon lainnya. Analisis Atomic Adsorbtion Spectroscopy(AAS) menunjukkan kadar mangan meningkat setelah proses pemurnian yaitu dari 13,6123 ppm hingga 21,8867 ppm untuk karbon cangkang kelapa sawit. Kadar mangan meningkat setelah proses pengendapan selektif dan adsorbsi. Kadar pengotor yang terkandung dalam bijih mangan seperti Fe, Al, Si, K, Ba, P, Mg, Ca dan Ti dianalisis menggunakan X-Ray Fluoresense (XRF).Proses pengendapan selektif dapat menghilangkan pengotor Fe sekitar 98%. Proses pemurnian dengan metode adsorbsi dapat menghilangkan pengotor sebanyak 98 % Fe.Hasil karakterisasi menggunakan X-Ray Difraktion (XRD) untuk MnO2 murni menunjukkan bahwa sistem kristal yang dihasilkan adalah tetragonal dengan puncak tertinggi pada sudut 2Î¸ = 25,3591o dengan indeks miller (111) dan ukuran kristal MnO2 diperoleh sebesar 53,08 nm.Kata Kunci : Bijih Mangan, Mangan Oksida, Pengendapan Selektif, Adsorbsi, Karbon
Análisis medioambiental del manejo de residuos sólidos de los mercados abiertos en Perú, una revisión narrativa.
Authors: Chancafe Rodríguez José Gerardo
Published: July 2023

La calidad ambiental es muy importante para la vida de las personas y en este contexto, las organizaciones proveedoras de bienes perecederos, conocidos como mercados de alimentos, necesitan indicadores de saneamiento para gestionar adecuadamente los residuos orgánicos. Es por ello que este estudio tiene como objetivo principal, a través de una revisión bibliográfica en las bases de datos Scopus, Latindex, Dialnet, Redalyc y Google Académico, contribuir a la investigación de los niveles de contaminación de los residuos sólidos generados en los centros de abastecimiento de alimentos del Perú con el fin de avanzar en nuevos conocimientos que puedan proporcionar medios eficientes y mejorar la comunicación del mensaje al público. En conclusión, el manejo de residuos sólidos en los mercados abiertos de Perú presenta desafíos significativos en términos de recolección, disposición final y separación de residuos en la fuente. Para abordar estos desafíos, se necesitan esfuerzos conjuntos entre el gobierno, los vendedores y la sociedad civil para mejorar la infraestructura y los sistemas de recolección, promover la separación adecuada de residuos en la fuente y fomentar la educación y conciencia ambiental.
Perancangan Business Intelligence Data Ketersediaan Obat di Puskesmas Curug Tangerang
Authors: Budisantoso Mohamad Dimas , Sugiarto Dedy , Siswanto Teddy
Published: July 2023

Puskesmas Curug merupakan layanan pusat kesehatan masyarakat yang berlokasi di kecamatan Curug, Kabupaten Tangerang. Sebagai tempat pelayanan kesehatan, maka diperlukan ketersediaan stok obat untuk menjamin proses pelayanan Kesehatan berjalan dengan baik terutama dalam mendapatkan obat di Puskesmas. Namun faktanya di puskesmas sering terjadi jumlah obat mengalami surplus dan defisit stok pada saat periode berjalan. Hal ini dapat memengaruhi kegiatan operasional pelayanan dalam mengelola stok obat-obatan. Maka dari itu, dibutuhkan perancangan Business Intelligence yang mengelola sebuah data kompleks menjadi data yang tervisualisasikan untuk proses peramalan stok obat di periode yang akan datang. Pengolahan data stok obat dsetiap periode dilakukan dengan Proses ETL (Extract, Transform, and Load) menggunakan tools Spoon Pentaho Data Integration. Sedangkan visualisasi data stok obat dari hasil peramalan menggunakan tools Microsoft Power BI dan R Studio, untuk peramalan digunakan metode ARIMA yang memiliki signifikansi kemampuan peramalan yang baik, sebab memiliki MAPE diangka <10%, dan 10 – 20%.
Ekstraksi Informasi Menggunakan Named Entity Recognition dan Pembuatan Association Rule Pada Dokumen Direktori Putusan Mahkamah Agung Republik Indonesia
Authors: Fadila Afgan Muhammad Rizky , Sari Syandra , Ariwibowo Anung B. , Sugiarto Dedy
Published: July 2023

Land is fundamental to the needs of human life. Humans carry out activities on the ground, so that they are obstructed from getting all human activities both directly and indirectly carried out on the ground. Land is a natural resource that is given by God Almighty to the Indonesian people as national wealth and is a means of meeting all life activities that are important for human life. In this case everyone must need land. Land is often used as a case by disputes, because of the limited area of landInvolved a lot of land The author will extract information in the Directory file Decision Mahkmah Agung is done to produce a named entity taken from the file. PDF extracted. In this study, the author uses the introduction of an entity named (NER Entity Recognition or NER). NER is used to retrieve named entities. After that the author uses the Association Rule to inform data in the form of graphs for analysis Land is fundamental to the needs of human life. Humans carry out activities on the ground, so that they are obstructed from getting all human activities both directly and indirectly carried out on the ground. Land is a natural resource that is given by God Almighty to the Indonesian people as national wealth and is a means of meeting all life activities that are important for human life. In this case everyone must need land. Land is often used as a case by disputes, because of the limited area of land                                Involved a lot of land The author will extract information in the Directory file Decision Mahkmah Agung is done to produce a named entity taken from the file. PDF extracted. In this study, the author uses the introduction of an entity named (NER Entity Recognition or NER). NER is used to retrieve named entities. After that the author uses the Association Rule to inform data in the form of graphs for analysis
Implementasi Knowledge Management pada Tanaman Kopi
Authors: Abdullah Syaifudin , Fatahilah Ahmad , Sari Syandra
Published: July 2023

Abstract Kopi adalah salah satu produk yang sering digunakan sebagai minuman penghangat atau untuk penghilang rasa lelah dan kantuk yang sudah terkenal di dunia maupun di Indonesia. Faktor yang berpengaruh dengan sifat fisik, kimiawi, kontaminasi dan kebersihan biji kopi yang dijaga dengan ketat oleh karena itu, biji yang berkualitas sangat menentukan hasil dari cita rasa yang dihasilkan oleh kopi tersebut. Permasalahan terbesar yang menyebabkan turunnya produksi biji kopi karena adanya penyakit pada tanaman kopi yang dapat menimbulkan rusaknya hasil panen biji kopi. Untuk melakukan pencegahan serta penanganan pada penyakit kopi peneliti menggunakan Knowledge Management sebagai topik penelitian, kemudian untuk melakukan pengumpulan data menggunakan metode dari Becerra-Fernandez sedangkan untuk melakukan identifikasi terhadap penyakit pada kopi menggunakan metode Case Based Reasoning. Jika seluruh data sudah terkumpul maka peneliti akan membuat aplikasi untuk mengidentifikasi penyakit dengan menggunakan SDLC Waterfall sebagai metodologi pengembangan perangkat lunak dan menggunakan UML untuk rancangan aplikasi berbasis website dengan tujuan aplikasi tersebut dapat diakses oleh para petani kopi untuk mengetahui jenis-jenis penyakit dan cara penanganannya. Kata Kunci : Tanaman Kopi , Penyakit Kopi , Case Based Reasoning, BecerraFernandez , Knowledge Management, SDLC Waterfall
“DOSPEMKU” CHAT APPLICATION PROTOTYPE WITH THREADING FEATURE USING CORDOVA FRAMEWORK FOR ANDROID-BASED COMPETENCY CONSULTATION
Authors: Dana Anwar Ibrahin , Zuhdi Ahmad , Santoso Gatot Budi
Published: July 2023

Abstract—In this days, human communication that is efficient and easy is through a system of social media chat application devices. By relying on internet signals, users can carry out meeting activities between one party using social media without the need to use face-to-face meetings, one of which is in communicating consultations on competency issues in the world of education. The reference for this final project is based on the author's thoughts to form a web-based media Halodoc, which is the formulation of the core problem of this final project. With DOSPEMKU, the author can hope to solve some case examples. As for examples of cases such as difficulties coming because there is no time to go (in busyness), determining a time schedule that is not suitable, being inflexible, and so on. DOSPEMKU is a chat application based on the Android operating system, implementing Usecase Diagrams and Activity Diagrams as a designer for functionality requirements that are implemented into DOSPEMKU. The Cordova network is used as an Integrated Development Environment (IDE) platform with html, javascript programming languages ​​and uses the phpMyAdmin database as the database base. Design Implementation uses several methods, ranging from interface design, database, to functionality design in determining what features are contained in DOSPEMKU. The implementation process is tested both in terms of functionality and non-functionality to test whether the application is in accordance with the design stage. So that the process of designing, implementing and testing it was found that the application was made according to and accommodated the conversation according to the discussion.
Regulação de big techs no Brasil: necessidade ou equívoco?
Authors: Flávio de Oliveira Amanda
Published: July 2023

Desde que a União Europeia fez publicar o DMA (Digital Markets Act) e desde que, nos Estados Unidos, o governo Biden alçou a cargos públicos relevantes alguns acadêmicos críticos do poder das big techs, discute-se à exaustão no Brasil se o país deveria aliar-se ao movimento de produção de medidas regulatórias específicas para essa espécie de agente econômico. O presente texto pretende oferecer uma perspectiva diferente daquela que vem sendo mais comumente apresentada, concluindo pela desnecessidade dessa regulação, fundamentando-se em razões jurídico-econômicas pertinentes e apontando um possível erro de diagnóstico que esteja sendo cometido pelos estudiosos do tema. Acredita-se que o ordenamento jurídico brasileiro já possui o instrumental necessário para o enfrentamento dos problemas que surgem, os quais não se diferenciam muito de situações similares precedentes.
EXPLORING MULTICULTURALISM IMPLEMENTATION TO FOSTER DIVERSITY AMONG ELEMENTARY SCHOOL STUDENTS
Authors: Budiana Sandi , Anoegrajekti Novi , Abdul Hakim Muhammad Kamal Bin
Published: July 2023

This research focuses on analyzing the actual state of implementing multiculturalism and identifying strategies to improve its effectiveness in elementary school students from an early age. The study employs a qualitative method and collects data from elementary school teachers and principals through in-depth interviews, documentation studies, and observation. The data obtained is then analyzed through data reduction, data presentation, and drawing conclusions. The study reveals that the majority of elementary school teachers view the implementation of multiculturalism as highly important, while a smaller portion considers it important. Teachers emphasize the importance of multiculturalism in maintaining social harmony, preventing conflicts among residents, fostering awareness of diversity within the country, and upholding national unity and integrity. A significant number of teachers express strong support for the development of teaching materials that integrate multiculturalism. However, the current implementation of multiculturalism lacks a systematic approach in planning, implementation, and evaluation. To enhance the effectiveness of implementing multiculturalism in elementary school students, teachers can employ various strategies.Keywords: diversity; learning material; multiculturalism; qualitative approach.
Die Middeleeus-mistieke en Kaaps-piëtistiese Kontekstualisering van Dorothea Magdalena Goosen (c.1774–c.1840) se Uitdrukkings van Liefdesnumineuse in haar Outobiografiese Aantekeninge en Poësie
Authors: Raath Andries Gerhardus
Published: July 2023

Cape Pietism is a hybrid, transnational and transconfessional form of spirituality, emanating from the Pietistic movement in Germany, with its emphasis on medieval mysticism, piety and spiritual devotion to Christ, and Dutch Second Reformation influences. Feminine Pietists in South African frontier communities were the practitioners of this form of spirituality, analogous to similar trends in the mystical cultures in German and Dutch Medieval mysticism. In addition to the influence of religious literature of German and Dutch Pietists, the marginalisation and isolation of feminine believers on the South African frontier cultivated tendencies similar to those in seventeenth- and eighteenth-century Pietism in Europe. Lay feminine spirituality in Cape frontier communities reflects forms of Pietistic mysticism parallel to the Beguines, the Dominican penitent women and female mystics elsewhere in Europe. Common to the diverse mystical cultures in Europe and the Cape frontier communities, is the expression of numinous experiences through mystical love metaphors—a legacy of Dionysius the Areopagite and other Neoplatonic Christian believers. Dorothea Magdalena Goosen is an exponent of Cape Pietistic tendencies with a strong undercurrent of melancholy and a feeling of spiritual abandonment. Her autobiographical ego-text and self-composed verses testify to her finding consolation in the grace of God through the inpouring of Christ’s love in her heart. Typical to female exponents of Cape Pietism, she longs for the heavenly rejoicing with Christ and the sweet elation of the heart following the embrace of the Bridegroom and restored consolation. Her numinous mystical experiences are recorded in Pietistic outpourings of love and bridal metaphors—mostly in an erotic form. A study of her mystical spirituality adds to broaden the corpus of knowledge of Cape Pietistic mysticism by tracing the roots of her love mysticism to the Neoplatonic legacy of German and Dutch female spirituality. The conclusion provides a clearer view of the mystical profile of feminine members of the petit bourgeoisie and their efforts at spiritual self-empowerment in their isolated living conditions in South African pioneering communities.
New Technologies and the Supply Chain of African Neo-Pentecostals
Authors: Orogun Daniel , Pillay Jerry
Published: July 2023

Academic conversation in missional activities revolves around some variables, including spiritual and theological paradigms. Among African Neo-Pentecostal Churches (ANPCs), where miracles and wonders are central to missional activities, it is uncommon to think that excellent delivery in missional service goes beyond power display, miracles and spiritual due diligence. Although some Christian ministries employ professional managers to oversee certain missional operations and logistics, the dynamics and impact of such managerial services, especially the “supply chain” process in the face of evolving technologies, are rarely brought forward in theological conversations. To fill this gap, this article places a searchlight on the interaction of ANPCs’ supply chain with new technologies (NTECH) in the past. Likewise, with an empirical survey covering 219 respondents as the primary source, it juxtaposes the current state with the future of the interaction. The outcome indicates no substantial interaction in the past and a possible wide margin between current and expected future interaction, with a 22.3% total median rate. Lastly, causes of low interaction are briefly discussed and lessons are presented for improved future interaction.
Recognition of a Disgorgement of Profits for Breach of Contract in the United States of America Law: Lessons for South African Law
Authors: Seanego KA
Published: July 2023

A disgorgement remedy for breach of contract seeks to take away profits acquired through breach of contract. Since contractual damages only seek to compensate the plaintiff for the patrimonial loss suffered due to breach of contract, the law of contract does not generally provide for the disgorgement of profits generated through breach of contract. However, there have been circumstances where the party in breach generates profits as a result of breach contract and the other party does not suffer patrimonial loss. As a result, the plaintiff in these circumstances would not have a remedy against the defendant because he cannot prove patrimonial loss caused by the breach. However, this position is changing. The recognition of disgorgement of profits acquired through breach of contract appears to be gaining acceptance around the world. The United States of America has recognised a disgorgement remedy to take away profits acquired through breach of contract to ensure that the defendant does not gain as a result of his breach of contract. A similar remedy has not yet gained acceptance in South Africa. This study seeks to assess how the United States of America has recognised a disgorgement remedy and draw some lessons for South African law in recognising a similar remedy.
Outcomes of Layered Closure and Adjunctive Adhesive Retention Suture Device Use Following Ankle Fracture Open Reduction and Internal Fixation: A Single Center, Retrospective Cohort Study
Authors: Stefanski Emily , Karwal Arun , Haniuk Erik
Published: July 2023

Introduction. Wound edge necrosis, dehiscence, infection, and need for reoperation can occur following ankle fracture ORIF. An assistive retention suture device has been developed to serve as an adjunct to skin closure to help mitigate the potential for wound dehiscence and subsequent complications. Objective. This single-center retrospective review compared early postoperative healing and functional outcomes following ankle fracture ORIF in 39 patients in which layered closure alone (n = 20) and layered closure with use of a DAC (n = 19) was performed. Results. Adjunctive assistive retention suture device use with layered closure following ankle fracture ORIF resulted in a 60% decrease in the time to healing, an 80% reduction in postoperative dehiscence, a 90% reduction in the need for reoperation, and a 53% reduction in the time in which use of an ambulatory assistive device, brace, or orthoses was required compared to layered closure alone. Conclusions. The results of this study suggest that use of this assistive retention suture device minimizes potential postoperative healing complications, decreases need for revisional surgery, and reduces time until return to activity.
Retrospective Review of Complications and Outcomes in COVID-19–Positive Patients With Comorbidities Undergoing Limb Salvage Procedures in a Tertiary Care Wound Center
Authors: Bovill John , Berger Lauren , Huffman Samuel , Spoer Daisy , Deldar Romina , Ko JiMin , Aintablian Aleek , Akbari Cameron , Attinger Christopher , Evans Karen
Published: July 2023

Introduction. COVID-19 illness is associated with increased operative risks, ranging from delayed wound healing and coagulopathy to increased risk of mortality. Objective. This article describes the authors’ recent experience of the implications of COVID-19 on limb salvage procedures. Materials and Methods. Patients who underwent LE limb salvage procedures within 30 days of a positive COVID-19 diagnosis were retrospectively reviewed. Patient demographics, comorbidities, surgical factors, postoperative complications, and management were collected. Results. Of 597 patients screened from February 2020 to March 2022, a total of 67 (11.2%) were diagnosed with COVID-19, of which 17 received the diagnosis within 30 days of surgery and were thus included. Average follow-up was 43 ± 3.2 months, at which point 6 (35.3%) were fully healed. The mortality rate at the most recent follow-up visit was 29.4% of patients (n = 5). Two patients required admission to the SICU following index procedure, and 1 necessitated a return to the operating room. Conclusion. COVID-19 may negatively affect the wound healing process while increasing the mortality rate amongst patients with multiple or severe comorbidities undergoing limb salvage procedures. Medical providers need to be aware of the complexity of these patients and apply a multi-disciplinary protocol to obtain successful outcomes.
Methotrexate-associated Lymphoproliferative Disorder Presenting as an Ulcer With Tendon Exposure on the Dorsum of the Hand: A Case Report and Literature Review
Authors: Kawamoto Haruka , Shimbo Keisuke , Koshima Isao
Published: July 2023

Introduction. MTX-LPD is a complication that occurs during MTX treatment. Skin lesions in MTX-LPD are often subcutaneous nodules with occasional necrosis and ulceration. Although MTX-LPD regression is frequently observed upon discontinuation of oral MTX treatment, delayed diagnosis of MTX-LPD with associated ulceration may lead to ulcer enlargement and the need for surgical procedures such as skin grafts. Case Report. A 74-year-old female was diagnosed with RA and administered MTX for 3 years and 8 months. The patient presented with a 2-month-old ulcer on the dorsum of the hand. The ulcer size was 6.5 cm × 5 cm, and it was surrounded by an embankment tumor measuring 7 cm × 6 cm. Although a definitive diagnosis could not be made based on the biopsy specimen, excision of the ulcer-containing mass confirmed MTX-LPD diagnosis. MTX was discontinued, and free-flap reconstruction was performed 3 weeks after the first surgery. The postoperative period was uneventful, and MTX-LPD recurrence was not observed 10 months after the second surgery. Conclusion. Although MTX-LPD with ulceration is rare, it should be considered in cases of refractory ulcers in patients with RA. The discontinuation of MTX based on early MTX-LPD diagnosis is critical to avoid surgical procedures such as skin grafts and flap reconstruction.
SYNTHESIS OF A NEW ADSORBENT BASED ON THE MILD DEALUMINATED BINDER FREE GRANULAR Y ZEOLITE
Authors: Ahmed Kanaan R. , Mohammed Dlzhar S. , Ali Farhad M.
Published: July 2023

This study investigates, for the first time, the effects of dealumination of binder-free NaY type zeolite on the adsorption properties and porous structure characteristics. In this study, BF-Y zeolite was hydrothermally synthesized from kaolin and powder NaY. BF-Y was then treated with acid to increase Si/Al ratio. X-ray Diffraction (XRED), Thermal Gravimetric Analysis (TGA), Scanning Electron Microscope (SEM), and Energy Dispersive X-Ray (EDX) have been performed for the characterization. The modified zeolite granules MBF-Y were used as an adsorbent for the removal of methylene blue MB dye from water. The influence of initial MB concentration, contact time, temperature, and adsorbent dosage on adsorption capacity and dye removal percentage on MBF-Y was investigated. The maximum dye removal was attained at a concentration of (8 * 10-6 M) which was more than 93%, and an equilibrium contact time of 60 minutes. Well-known adsorption isotherms (Langmuir, Fruendlich, and Tempkin) were used to study the adsorption mechanism of MB onto MBF-Y.