Pub Date : 2022-07-21DOI: 10.55043/technologica.v1i2.45
Risatul Umami, Hasbi mubarak Suud, Bambang Kusmanadhi, D. E. Kusbianto
Kabupaten Jember memiliki beberapa wilayah yang berpotensi dalam pengembangan kopi, salah satunya di Desa Banjarsengon Kecamatan Patrang yang memiliki luas lahan 65 hektar. Untuk meningkatkan potensi daerah tersebut, maka penelitian eksplorasi pengolahan biji kopi yang dihasilkan menjadi penting untuk dilakukan. Salah satu proses pengolahan kopi yang penting yaitu proses penyangraian. Penyangraian merupakan proses pembentukan rasa dan aroma pada biji kopi. Tujuan penelitian ini untuk mengetahui perubahan kandungan kafein dan sifat fisik kopi robusta yang dihasilkan oleh petani lokal setempat. Terdapat tiga variasi suhu dan waktu penyangraian yang digunakan dalam penelitaian ini. Untuk pengamatan suhu penyangraian dilakukan pada suhu 190oC, 200oC, 210oC dan durasi lama penyangraian digunakan pada 10, 15, dan 20 menit. Hasil penelitian menunjukkan kombinasi temperatur 190oC dan lama penyangraian 10 menit memiliki kadar kafein terendah yaitu sebesar 3,18%. Selain itu, diketahui berdasarkan uji Duncan faktor lama penyangraian memiliki pengaruh sangat nyata terhadap jumlah kadar air dan densitas curah pada biji kopi. Sedangkan melalui pengamatan uji fisik diketahui bahwa semakin besar suhu dan semakin lama durasi penyangraian dapat mengakibatkan biji kehilangan kadar air juga semakin besar maka massa pada bijipun berkurang
{"title":"Pengaruh Temperatur Dan Lama Penyangraian Terhadap Kandungan Kafein Dan Sifat Fisik Kopi Robusta Asal Banjarsengon Jember","authors":"Risatul Umami, Hasbi mubarak Suud, Bambang Kusmanadhi, D. E. Kusbianto","doi":"10.55043/technologica.v1i2.45","DOIUrl":"https://doi.org/10.55043/technologica.v1i2.45","url":null,"abstract":"Kabupaten Jember memiliki beberapa wilayah yang berpotensi dalam pengembangan kopi, salah satunya di Desa Banjarsengon Kecamatan Patrang yang memiliki luas lahan 65 hektar. Untuk meningkatkan potensi daerah tersebut, maka penelitian eksplorasi pengolahan biji kopi yang dihasilkan menjadi penting untuk dilakukan. Salah satu proses pengolahan kopi yang penting yaitu proses penyangraian. Penyangraian merupakan proses pembentukan rasa dan aroma pada biji kopi. Tujuan penelitian ini untuk mengetahui perubahan kandungan kafein dan sifat fisik kopi robusta yang dihasilkan oleh petani lokal setempat. Terdapat tiga variasi suhu dan waktu penyangraian yang digunakan dalam penelitaian ini. Untuk pengamatan suhu penyangraian dilakukan pada suhu 190oC, 200oC, 210oC dan durasi lama penyangraian digunakan pada 10, 15, dan 20 menit. Hasil penelitian menunjukkan kombinasi temperatur 190oC dan lama penyangraian 10 menit memiliki kadar kafein terendah yaitu sebesar 3,18%. Selain itu, diketahui berdasarkan uji Duncan faktor lama penyangraian memiliki pengaruh sangat nyata terhadap jumlah kadar air dan densitas curah pada biji kopi. Sedangkan melalui pengamatan uji fisik diketahui bahwa semakin besar suhu dan semakin lama durasi penyangraian dapat mengakibatkan biji kehilangan kadar air juga semakin besar maka massa pada bijipun berkurang","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85533863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-21DOI: 10.55043/technologica.v1i2.46
Sutria Desman, Helfia Edial
Setiap tahun Kota Payakumbuh mengalami peningkatan penggunaan air bersih, hal ini dapat dilihat dari terjadinya peningkatan jumlah pelanggan PDAM disetiap tahun. Terjadi peningkatan sebesar 9.335 pelanggan selama Sembilan tahun, atau rata-rata meningkat seribu pelanggan setiap tahunnya. Seiring dengan bertambahnya jumlah masyarakat pengguna air bersih maka hal ini dikhawatirkan dapat mengakibatkan terjadinya potensi penurunan debit air bersih. Pada bagian lain pertumbuhan jumlah penduduk setiap tahunnya juga menyebabkan penggunaan lahan terbangun yang terus meningkat. Untuk mengantisipasi penurunan potensi air bersih ini maka dilakukan analisis daya dukung lahan dan daya tampung air Kota Payakumbuh. Penelitian ini menggunakanan metode Analisis Driver, Pressure, Impact dan Respons serta Study literatur.Hasil dari analisis, perlunya peningkatan luas dan kualitas daerah tangkapan air,Meningkatkan tutupan vegetasi pada lahan-lahan terbuka, pengembangan tata kelola lahan basah,Peningkatan pengawasan dan pemantauan tutupan lahan.
{"title":"Antisipasi Potensi Penurunan Debit Air Melalui Analisis Daya Dukung Lahan Dan Daya Tampung Air Kota Payakumbuh","authors":"Sutria Desman, Helfia Edial","doi":"10.55043/technologica.v1i2.46","DOIUrl":"https://doi.org/10.55043/technologica.v1i2.46","url":null,"abstract":"Setiap tahun Kota Payakumbuh mengalami peningkatan penggunaan air bersih, hal ini dapat dilihat dari terjadinya peningkatan jumlah pelanggan PDAM disetiap tahun. Terjadi peningkatan sebesar 9.335 pelanggan selama Sembilan tahun, atau rata-rata meningkat seribu pelanggan setiap tahunnya. Seiring dengan bertambahnya jumlah masyarakat pengguna air bersih maka hal ini dikhawatirkan dapat mengakibatkan terjadinya potensi penurunan debit air bersih. Pada bagian lain pertumbuhan jumlah penduduk setiap tahunnya juga menyebabkan penggunaan lahan terbangun yang terus meningkat. Untuk mengantisipasi penurunan potensi air bersih ini maka dilakukan analisis daya dukung lahan dan daya tampung air Kota Payakumbuh. Penelitian ini menggunakanan metode Analisis Driver, Pressure, Impact dan Respons serta Study literatur.Hasil dari analisis, perlunya peningkatan luas dan kualitas daerah tangkapan air,Meningkatkan tutupan vegetasi pada lahan-lahan terbuka, pengembangan tata kelola lahan basah,Peningkatan pengawasan dan pemantauan tutupan lahan.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83697770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-21DOI: 10.55043/technologica.v1i2.47
R. Utama, Jerry Antonio
Jeruk kalamansi telah menjadi komoditi yang banyak dikembangkan di provinsi Bengkulu sebagai bahan baku olahan sirup dan produk lainnya. Salah satu produk olahan yang berpotensi dikembangkan dari jeruk kalamansi adalah minuman kalamansi siap minum dalam kemasan. Tujuan penelitian ini adalah untuk mengetahui preferensi responden terhadap kemasan minuman kalamansi siap minum menggunakan analisis conjoint. Atribut kemasan yang dianalisis pada penelitian ini adalah bentuk, warna, dan volume. Atribut bentuk terdiri dari tiga level yaitu botol, cup, dan spout standing pouch. Atribut warna terdiri dari tiga level yaitu transparan, putih, dan kuning. Atribut volume terdiri dari tiga level yaitu 180 ml, 250 ml, dan 350 ml. Jumlah responden pada penelitian ini adalah 104 orang responden. Analisis conjoint menghasilkan nilai kepentingan atribut dan nilai utilitas level pada masing – masing atribut. Atribut bentuk merupakan atribut dengan nilai kepentingan tertinggi yaitu 43,48%, diikuti oleh atribut volume 30,27%, dan atribut warna 26,25%. Berdasarkan nilai utilitas pada masing – masing atribut, kemasan yang dipilih responden adalah berbentuk botol, volume 180 ml, dan berwarna kuning.
{"title":"Analisis Conjoint Terhadap Preferensi Konsumen Pada Kemasan Minuman Kalamansi Siap Minum Di Kota Bengkulu","authors":"R. Utama, Jerry Antonio","doi":"10.55043/technologica.v1i2.47","DOIUrl":"https://doi.org/10.55043/technologica.v1i2.47","url":null,"abstract":"Jeruk kalamansi telah menjadi komoditi yang banyak dikembangkan di provinsi Bengkulu sebagai bahan baku olahan sirup dan produk lainnya. Salah satu produk olahan yang berpotensi dikembangkan dari jeruk kalamansi adalah minuman kalamansi siap minum dalam kemasan. Tujuan penelitian ini adalah untuk mengetahui preferensi responden terhadap kemasan minuman kalamansi siap minum menggunakan analisis conjoint. Atribut kemasan yang dianalisis pada penelitian ini adalah bentuk, warna, dan volume. Atribut bentuk terdiri dari tiga level yaitu botol, cup, dan spout standing pouch. Atribut warna terdiri dari tiga level yaitu transparan, putih, dan kuning. Atribut volume terdiri dari tiga level yaitu 180 ml, 250 ml, dan 350 ml. Jumlah responden pada penelitian ini adalah 104 orang responden. Analisis conjoint menghasilkan nilai kepentingan atribut dan nilai utilitas level pada masing – masing atribut. Atribut bentuk merupakan atribut dengan nilai kepentingan tertinggi yaitu 43,48%, diikuti oleh atribut volume 30,27%, dan atribut warna 26,25%. Berdasarkan nilai utilitas pada masing – masing atribut, kemasan yang dipilih responden adalah berbentuk botol, volume 180 ml, dan berwarna kuning.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79435300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-21DOI: 10.55043/technologica.v1i2.43
Angga Defrian, Sandra Melly, Irwan A, Rildiwan, Zulfakri, Amrizal, I. Laksmana, E. Syafri
Telah dilakukan pembuatan alat ukur EC pada kesuburan tanah berbasis Arduino UNO mikrokontroler ATmega328. Perangkat ini menggunakan sensor voltase, dan ampere. Alat ukur ini terdiri dari yaitu unit UNO mmikrokontroler ATMega 328, SD Card, Volt, Ampere, dan RTC. Metode penelitian dini meliputi perancangan , pembuatan dan pengujian perangkat. Setelah pengujian perangkat ini akan memantau volt, ampere, yang akan dikonversi EC, pengujian ini masih dalam prototype didalam kotak ukur resistivitas tanah dan dilakukan pengujian pada kadar air (8%). Alat prototype ini dilengkapi dengan sistem data logger sebagai penyimpanan data hasil pengukuran ke SD card. Penyimpanan data dilakukan setiap 5 detik dan pada penelitian ini dilakukan selama 2 jam. Sample tanah yang teliti adalah tanah lempung berpasir.
{"title":"Rancang Bangun Prototipe Sistem Data Logger Alat Ukur Ec Berbasis Arduino UNO Mikrokontroler ATmega328 Pada Kesuburan Tanah","authors":"Angga Defrian, Sandra Melly, Irwan A, Rildiwan, Zulfakri, Amrizal, I. Laksmana, E. Syafri","doi":"10.55043/technologica.v1i2.43","DOIUrl":"https://doi.org/10.55043/technologica.v1i2.43","url":null,"abstract":"Telah dilakukan pembuatan alat ukur EC pada kesuburan tanah berbasis Arduino UNO mikrokontroler ATmega328. Perangkat ini menggunakan sensor voltase, dan ampere. Alat ukur ini terdiri dari yaitu unit UNO mmikrokontroler ATMega 328, SD Card, Volt, Ampere, dan RTC. Metode penelitian dini meliputi perancangan , pembuatan dan pengujian perangkat. Setelah pengujian perangkat ini akan memantau volt, ampere, yang akan dikonversi EC, pengujian ini masih dalam prototype didalam kotak ukur resistivitas tanah dan dilakukan pengujian pada kadar air (8%). Alat prototype ini dilengkapi dengan sistem data logger sebagai penyimpanan data hasil pengukuran ke SD card. Penyimpanan data dilakukan setiap 5 detik dan pada penelitian ini dilakukan selama 2 jam. Sample tanah yang teliti adalah tanah lempung berpasir.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85997649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-21DOI: 10.55043/technologica.v1i2.44
Dilson, Arman, Nelfira, Rosda Syelly
Untuk menghindari kesalahan dalam menetapkan penerima Beasiswa Program Indonesia Pintar (PIP) diperlukan sebuah metode yang cocok untuk memutuskan siswa yang berhak menerima beasiswa PIP tersebut. Tujuan penelitian adalah menentukan siswa penerima beasiswa PIP menggunakan metode Analytic Network Process (ANP) yang diimplementasikan menggunakan sistem penunjang keputusan open source (superdecission). Data diperoleh secara langsung pada SMPN 1 Batang Anai melalui tanya jawab dengan bagian keuangan menggunakan kuisioner. Kriteria yang menjadi pertimbangan dalam pengambilan keputusan adalah 1) pekerjaan orang tua, 2) pendapatan orang tua,3) rata-rata nilai raport, dan 4)jumlah tanggungan. Dengan menentukan nilai perbandingan masing-masing kriteria, menetapkan nilai rata-rata, dan menentukan bobot akhir dengan perhitungan menggunakan superdecission, maka dapat ditentukan 5 orang siswa penerima beasiswa PIP secara berurut adalah 1) OR1 (35%), 2) OR3 (35%), 3) OR5 (35%), 4) OR2 (27%), dan 5) OR6 (27%).
{"title":"Implementasi Metode Analytic Network Process Dalam Menetapkan Beasiswa Program Indonesia Pintar Menggunakan Superdecission","authors":"Dilson, Arman, Nelfira, Rosda Syelly","doi":"10.55043/technologica.v1i2.44","DOIUrl":"https://doi.org/10.55043/technologica.v1i2.44","url":null,"abstract":"Untuk menghindari kesalahan dalam menetapkan penerima Beasiswa Program Indonesia Pintar (PIP) diperlukan sebuah metode yang cocok untuk memutuskan siswa yang berhak menerima beasiswa PIP tersebut. Tujuan penelitian adalah menentukan siswa penerima beasiswa PIP menggunakan metode Analytic Network Process (ANP) yang diimplementasikan menggunakan sistem penunjang keputusan open source (superdecission). Data diperoleh secara langsung pada SMPN 1 Batang Anai melalui tanya jawab dengan bagian keuangan menggunakan kuisioner. Kriteria yang menjadi pertimbangan dalam pengambilan keputusan adalah 1) pekerjaan orang tua, 2) pendapatan orang tua,3) rata-rata nilai raport, dan 4)jumlah tanggungan. Dengan menentukan nilai perbandingan masing-masing kriteria, menetapkan nilai rata-rata, dan menentukan bobot akhir dengan perhitungan menggunakan superdecission, maka dapat ditentukan 5 orang siswa penerima beasiswa PIP secara berurut adalah 1) OR1 (35%), 2) OR3 (35%), 3) OR5 (35%), 4) OR2 (27%), dan 5) OR6 (27%).","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84437433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Bekraoui, H. Fatnassi, A. Kheir, Sanae Chakir, A. Senhaji, M. Mouqallid, H. Majdoubi
Abstract In Mediterranean basin, citrus culture is expanding rapidly with a growing demand for high-quality saplings. Protected cultivation with fine microclimate conditions control is the best process of citrus saplings growing with the required quality. In this context, the developed microclimate of a tunnel citrus saplings greenhouse and its effects on plant activity parameters, such as leaf temperature and transpiration, were investigated. The findings show that the temperatures of air and plant leaves inside the greenhouse are highly variable between 6 °C and 33 °C and from 8 °C to 30 °C, respectively. Results also show that greenhouse air humidity is very high – more than 80%. The analysis of plant transpiration based on greenhouse microclimate conditions and leaf temperature reveals that (i) plant transpiration varies throughout the day (between 1.9 and 65.7 mg m−2·s−1); (ii) leaf temperature simulation can be used as an indirect indicator of plant water stress; and (iii) the simulated temperature difference between the leaves and the internal air of the greenhouse can be used to define the minimum threshold air temperature for proper plant development under the greenhouse conditions.
{"title":"Study of Microclimate and Sapling Citrus Plant Transpiration in Tunnel Greenhouse Under Mediterranean Conditions","authors":"A. Bekraoui, H. Fatnassi, A. Kheir, Sanae Chakir, A. Senhaji, M. Mouqallid, H. Majdoubi","doi":"10.2478/ata-2022-0010","DOIUrl":"https://doi.org/10.2478/ata-2022-0010","url":null,"abstract":"Abstract In Mediterranean basin, citrus culture is expanding rapidly with a growing demand for high-quality saplings. Protected cultivation with fine microclimate conditions control is the best process of citrus saplings growing with the required quality. In this context, the developed microclimate of a tunnel citrus saplings greenhouse and its effects on plant activity parameters, such as leaf temperature and transpiration, were investigated. The findings show that the temperatures of air and plant leaves inside the greenhouse are highly variable between 6 °C and 33 °C and from 8 °C to 30 °C, respectively. Results also show that greenhouse air humidity is very high – more than 80%. The analysis of plant transpiration based on greenhouse microclimate conditions and leaf temperature reveals that (i) plant transpiration varies throughout the day (between 1.9 and 65.7 mg m−2·s−1); (ii) leaf temperature simulation can be used as an indirect indicator of plant water stress; and (iii) the simulated temperature difference between the leaves and the internal air of the greenhouse can be used to define the minimum threshold air temperature for proper plant development under the greenhouse conditions.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48025955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Y. Syromyatnikov, A. Kuts, Irina Troyanovskaya, Alexandra Orekhovskaya, E. Tikhonov, V. Sokolova
Abstract Currently, loosening and separating machines that combine the operations of crumbling and separating of soil according to the treated layer depth have come to the forefront. Interaction of the rotor blade of these machines with the soil comprises three stages: soil core formation; steady movement; and dumping of soil from the separating grid. The article determined the direction and magnitude of soil displacement, parameters and shape of the furrow formed after the ripper passage. Based on theoretical research, a mathematical model of the interaction of working bodies with the soil was developed. The initial data were obtained experimentally, and the model was justified. As a result, it was found that the supplied soil layer thickness and the fracture angle of ripper have the greatest influence on the transporting capacity of rotor ripper. Reducing the rotor blade entry angle into the soil from 45° to 30° made it possible to raise the second soil feed of the loosening and separating machine by more than 40 times. The width of rotor ripper practically does not affect the transporting capacity. Changing the angle of ripper entry into the soil allowed obtaining of the required transporting capacity of ripping and separating machine without changing the rotor design. Practical significance of the study lies in the possibility of increasing the work productivity without increasing its energy indicators.
{"title":"Transporting Ability Calculation of the Rotor of Soil-Cultivating Loosening and Separating Vehicle","authors":"Y. Syromyatnikov, A. Kuts, Irina Troyanovskaya, Alexandra Orekhovskaya, E. Tikhonov, V. Sokolova","doi":"10.2478/ata-2022-0012","DOIUrl":"https://doi.org/10.2478/ata-2022-0012","url":null,"abstract":"Abstract Currently, loosening and separating machines that combine the operations of crumbling and separating of soil according to the treated layer depth have come to the forefront. Interaction of the rotor blade of these machines with the soil comprises three stages: soil core formation; steady movement; and dumping of soil from the separating grid. The article determined the direction and magnitude of soil displacement, parameters and shape of the furrow formed after the ripper passage. Based on theoretical research, a mathematical model of the interaction of working bodies with the soil was developed. The initial data were obtained experimentally, and the model was justified. As a result, it was found that the supplied soil layer thickness and the fracture angle of ripper have the greatest influence on the transporting capacity of rotor ripper. Reducing the rotor blade entry angle into the soil from 45° to 30° made it possible to raise the second soil feed of the loosening and separating machine by more than 40 times. The width of rotor ripper practically does not affect the transporting capacity. Changing the angle of ripper entry into the soil allowed obtaining of the required transporting capacity of ripping and separating machine without changing the rotor design. Practical significance of the study lies in the possibility of increasing the work productivity without increasing its energy indicators.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46142436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract The paper content is focused on the various evaluation methods of mechanical pre-treatment of hot-dip galvanized surface performed in order to increase the organic paint adhesion (both synthetic and waterborne). Emphasis was placed on low volatile organic compounds (VOC) values in coating systems. Corrosion degradation of the tested coatings was also monitored. The mechanical surface pre-treatment was performed using a standard technology, so-called sweeping, with synthetic corundum with F40 grain size (these samples served as a standard). Alternative methods that can be used in operations without blasting equipment were also investigated. These included regrinding with two different grain sandpapers (P40 and P100) and regrinding with a corrosion resistant steel brush (wire diameter 0.3 mm). The surface texture was evaluated in accordance with the ČSN EN ISO 4287 standard. Corrosion-mechanical resistance was evaluated by a pull-off adhesion test (according to the ČSN EN ISO 4624 standard) and in a salt spray environment (according to the ČSN EN ISO 9227 standard). Based on the obtained results, mechanical pre-treatment with a corrosion resistant steel brush and possibly P100 grit sandpaper can be recommended, as pre-treatment with these tools showed statistically the best corrosion-mechanical properties.
摘要:本文主要介绍了热镀锌表面机械预处理的各种评价方法，以提高有机涂料的附着力(包括合成漆和水性漆)。重点放在涂层系统中的低挥发性有机化合物(VOC)值。测试涂层的腐蚀降解情况也进行了监测。机械表面预处理采用一种标准技术，即所谓的扫描，使用F40粒度的合成刚玉(这些样品作为标准)。还研究了在没有爆破设备的情况下可以使用的替代方法。其中包括用两种不同粒度的砂纸(P40和P100)和用耐腐蚀钢刷(钢丝直径0.3 mm)进行再磨。表面纹理按照ČSN EN ISO 4287标准进行评估。通过拉脱附着力测试(根据ČSN EN ISO 4624标准)和盐雾环境(根据ČSN EN ISO 9227标准)来评估耐腐蚀机械性能。根据获得的结果，可以推荐使用耐腐蚀钢刷和可能的P100砂纸进行机械预处理，因为统计上这些工具的预处理具有最佳的腐蚀力学性能。
{"title":"Influence of Zinc Coatings Mechanical Pre-Treatments for the Formation of Environmentally Friendly Passivation Duplex Anti-Corrosion Systems","authors":"Jaroslav Lozrt, J. Votava, Radim Šmak, A. Polcar","doi":"10.2478/ata-2022-0009","DOIUrl":"https://doi.org/10.2478/ata-2022-0009","url":null,"abstract":"Abstract The paper content is focused on the various evaluation methods of mechanical pre-treatment of hot-dip galvanized surface performed in order to increase the organic paint adhesion (both synthetic and waterborne). Emphasis was placed on low volatile organic compounds (VOC) values in coating systems. Corrosion degradation of the tested coatings was also monitored. The mechanical surface pre-treatment was performed using a standard technology, so-called sweeping, with synthetic corundum with F40 grain size (these samples served as a standard). Alternative methods that can be used in operations without blasting equipment were also investigated. These included regrinding with two different grain sandpapers (P40 and P100) and regrinding with a corrosion resistant steel brush (wire diameter 0.3 mm). The surface texture was evaluated in accordance with the ČSN EN ISO 4287 standard. Corrosion-mechanical resistance was evaluated by a pull-off adhesion test (according to the ČSN EN ISO 4624 standard) and in a salt spray environment (according to the ČSN EN ISO 9227 standard). Based on the obtained results, mechanical pre-treatment with a corrosion resistant steel brush and possibly P100 grit sandpaper can be recommended, as pre-treatment with these tools showed statistically the best corrosion-mechanical properties.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44457384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Over the last decades, north of Iran underwent remarkable land use/cover changes due to socio-economic and environmental factors. This study, focused on agricultural land changes for the period of 1990–2020 at Shanderman, Iran, employed Landsat 5 TM, and Landsat 8 OLI/TIRS images. A supervised maximum likelihood classification technique was utilized for the purposes of satellite data classification to four classes: agricultural land, forest, grassland, and built-up area. Results of land change modeller showed that, during the last three decades, agricultural land, grassland and forest decreased by 42.81%, 35.50%, and 4.05%, respectively, while built-up area increased by 361.23%. Most of the losses in agriculture areas occurred in 1990–2011 (44.64%). The predominant losses in 2011–2020 belonged to the forestland (12.47%), making them approx. 3.44 times higher than in 1990–2011. The results highlight the need for serious attention to the deforestation phenomenon, which leads to the conversion of forest into agricultural and built-up areas.
{"title":"Multi-Temporal Detection of Agricultural Land Losses Using Remote Sensing and Gis Techniques, Shanderman, Iran","authors":"Fatemeh Rahimi-Ajdadi, M. Khani","doi":"10.2478/ata-2022-0011","DOIUrl":"https://doi.org/10.2478/ata-2022-0011","url":null,"abstract":"Abstract Over the last decades, north of Iran underwent remarkable land use/cover changes due to socio-economic and environmental factors. This study, focused on agricultural land changes for the period of 1990–2020 at Shanderman, Iran, employed Landsat 5 TM, and Landsat 8 OLI/TIRS images. A supervised maximum likelihood classification technique was utilized for the purposes of satellite data classification to four classes: agricultural land, forest, grassland, and built-up area. Results of land change modeller showed that, during the last three decades, agricultural land, grassland and forest decreased by 42.81%, 35.50%, and 4.05%, respectively, while built-up area increased by 361.23%. Most of the losses in agriculture areas occurred in 1990–2011 (44.64%). The predominant losses in 2011–2020 belonged to the forestland (12.47%), making them approx. 3.44 times higher than in 1990–2011. The results highlight the need for serious attention to the deforestation phenomenon, which leads to the conversion of forest into agricultural and built-up areas.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45530667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Planting hole digging is a minimal tillage method, which is beneficial in terms of reducing energy consumption and preventing erosion. Current popular planting hole diggers work intermittently, which results in low productivity. A continuous-operating hole digging machine with an active tillage unit can solve this issue. However, the theoretical basis for this type of digger has not yet been developed; this is also true for the issue of determining the chip thickness – one of the main technical characteristics which significantly influences energy and agrotechnical indicators of active soil tillage. This paper presents research results of determining the soil chip cut thicknesses and observing of new cutting surface under a continuous operation of hole digging machine with an active tillage unit. At the same time, impacts of factors such as the number of knives and the kinematic factor on soil chip sizes are studied. The soil chip size determination and investigation of influence of kinematic and structural parameters on it is conducted via numerical simulation using MATLAB software. The key factors include kinematic factor λf and the number of knives on one cross-section of the tiller’s rotor Z. When λf and Z increase, the maximum average thicknesses decrease gradually; and vice versa, the new specific cutting surface decreases almost linearly. The results are considered a basis for the selection of final parameters for the construction and operation of one machine to meet agronomic requirements.
{"title":"Sizes of Soil Chip Cut By a Continuously Operating Planting Hole Digging Machine with an Active Tillage Unit","authors":"H. Beloev, N. Long, Dau The Nhu, N. D. That","doi":"10.2478/ata-2022-0013","DOIUrl":"https://doi.org/10.2478/ata-2022-0013","url":null,"abstract":"Abstract Planting hole digging is a minimal tillage method, which is beneficial in terms of reducing energy consumption and preventing erosion. Current popular planting hole diggers work intermittently, which results in low productivity. A continuous-operating hole digging machine with an active tillage unit can solve this issue. However, the theoretical basis for this type of digger has not yet been developed; this is also true for the issue of determining the chip thickness – one of the main technical characteristics which significantly influences energy and agrotechnical indicators of active soil tillage. This paper presents research results of determining the soil chip cut thicknesses and observing of new cutting surface under a continuous operation of hole digging machine with an active tillage unit. At the same time, impacts of factors such as the number of knives and the kinematic factor on soil chip sizes are studied. The soil chip size determination and investigation of influence of kinematic and structural parameters on it is conducted via numerical simulation using MATLAB software. The key factors include kinematic factor λf and the number of knives on one cross-section of the tiller’s rotor Z. When λf and Z increase, the maximum average thicknesses decrease gradually; and vice versa, the new specific cutting surface decreases almost linearly. The results are considered a basis for the selection of final parameters for the construction and operation of one machine to meet agronomic requirements.","PeriodicalId":43089,"journal":{"name":"Acta Technologica Agriculturae","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48235595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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