Relevant bibliographies by topics / Kerak

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Kerak'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 March 2023

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Journal articles on the topic "Kerak"

1

Chriswahyudi, Chriswahyudi, and Surya Adi Darma. "ANALISA KELAYAKAN INVESTASI ALAT PENGOLAHAN KERAK TEMBAGA DI PT. TEMBAGA MULIA SEMANAN." Jurnal PASTI 15, no. 1 (June 11, 2021): 46. http://dx.doi.org/10.22441/pasti.2021.v15i1.005.

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PT. Tembaga Mulia Semanan adalah salah satu perusahaan yang bergerak dibidang peleburan tembaga terkemuka di Indonesia.Memiliki jumlah kerak tembaga sebanyak 32.266 kg. Masalah yang dihadapi perusahaan adalah ketika kerak tembaga ini harus dijual dan dihargai hanya 73% dari harga LME (London Metal Exchange). Sehingga perusahaan mengalami kerugian 27%. Untuk memperbaiki masalah ini perusahaan membuat alat pengolahan kerak tembaga dan melakukan analisa investasi alat pengolahan ketak tembaga ini. Hasil perhitungan metode NPV (Net Present Value) adalah RP 366,79 juta, maka layak secara economis. Hasil perhitungan metode IRR (Internal Rate of Return) untuk MARR 15% adalah IRR = 26,94%, maka investasi tersebut layak secara economis. Hasil perhitungan metode BCR (Benefit Cost Ratio) adalah 1,528 maka investasi tersebut layak secara economis. Hasil perhitungan metode PBP (Peyback period) adalah k = 2,621 < n = 10 tahun, maka memenuhi syarat dan layak secara economis.
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Novianto, Adi. "PENGAMATAN TERJADINYA KERAK CuCO3 PADA KETEL UAP." T R A K SI 18, no. 1 (July 12, 2019): 52. http://dx.doi.org/10.26714/traksi.18.1.2018.52.

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Kerak tembaga karbonat (CuCO3) yang mengendap pada dinding pipa diselidiki dalam penelitian ini. Kerak tembaga karbonat adalah kerak yang sering terbentuk pada pipa boiler. Dalam eksperimental, larutan pembentuk kerak disiapkan dengan mencampurkan larutan equimolar CuCl2 dan Na2CO3. Tujuan dari penelitian ini adalah untuk membandingkan hasil penelitian tentang pembentukan kerak CuCO3 pada pipa boiler kerak CuCO3 dan pada pipa simulasi dengan suhu 300-4000C. Kerak yang terbentuk kemudian dievaluasi menggunakan analisis karakteristik kerak dan SEM/EDX. Hasil penelitian menunjukkan bahwa kerak memiliki pelat seperti morfologi dan kerak fase kristal yang ditemukan sebagian besar malasite. Berdasarkan hasil ini, kerak CuCO3 di Boiler memiliki kondisi panas yang sangat tinggi dan waktu panas yang lama membuat kerak CuCO3 berwarna hitam. Warna dan tekstur kerak CuCO3 pada pipa menunjukkan warna yang lebih cerah. Kerak yang terbentuk kemudian dievaluasi menggunakan analisis SEM / EDX. Perbandingan analisis antara hasil analisis kerak CuCO3 pada pipa boiler dan pipa simulator menunjukkan hasil yang berbeda. Hasil analisis SEM menunjukkan bahwa kristal yang dilakukan melalui eksperimen diambil dari boiler dan pipa. Perbedaan morfologi dan komposisi antara sampel kedua adalah karena boiler lebih panas daripada di pipa sehingga morfologi kristal CuCO3 dalam boiler lebih rapat dibandingkan di pipa.
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Novianto, Adi. "PENGAMATAN TERJADINYA KERAK CuCO3 PADA KETEL UAP." T R A K SI 18, no. 1 (July 12, 2019): 52. http://dx.doi.org/10.26714/traksi.18.1.2018.52-60.

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Kerak tembaga karbonat (CuCO3) yang mengendap pada dinding pipa diselidiki dalam penelitian ini. Kerak tembaga karbonat adalah kerak yang sering terbentuk pada pipa boiler. Dalam eksperimental, larutan pembentuk kerak disiapkan dengan mencampurkan larutan equimolar CuCl2 dan Na2CO3. Tujuan dari penelitian ini adalah untuk membandingkan hasil penelitian tentang pembentukan kerak CuCO3 pada pipa boiler kerak CuCO3 dan pada pipa simulasi dengan suhu 300-4000C. Kerak yang terbentuk kemudian dievaluasi menggunakan analisis karakteristik kerak dan SEM/EDX. Hasil penelitian menunjukkan bahwa kerak memiliki pelat seperti morfologi dan kerak fase kristal yang ditemukan sebagian besar malasite. Berdasarkan hasil ini, kerak CuCO3 di Boiler memiliki kondisi panas yang sangat tinggi dan waktu panas yang lama membuat kerak CuCO3 berwarna hitam. Warna dan tekstur kerak CuCO3 pada pipa menunjukkan warna yang lebih cerah. Kerak yang terbentuk kemudian dievaluasi menggunakan analisis SEM / EDX. Perbandingan analisis antara hasil analisis kerak CuCO3 pada pipa boiler dan pipa simulator menunjukkan hasil yang berbeda. Hasil analisis SEM menunjukkan bahwa kristal yang dilakukan melalui eksperimen diambil dari boiler dan pipa. Perbedaan morfologi dan komposisi antara sampel kedua adalah karena boiler lebih panas daripada di pipa sehingga morfologi kristal CuCO3 dalam boiler lebih rapat dibandingkan di pipa.
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Noviyanto, Adi. "ANALISA KOMPARASI PEMBENTUKAN KERAK KUPRI KARBONAT (CuCO3) PADA PIPA BOILER DAN PIPA SIMULATOR." T R A K SI 18, no. 2 (June 19, 2019): 69. http://dx.doi.org/10.26714/traksi.18.2.2018.69-77.

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Kerak tembaga karbonat (CuCO3) yang mengendap pada dinding pipa diselidiki dalampenelitian ini. Kerak tembaga karbonat adalah kerak yang sering terbentuk pada pipaboiler. Dalam eksperimental, larutan pembentuk kerak disiapkan dengan mencampurkanlarutan equimolar CuCl2 dan Na2CO3. Tujuan dari penelitian ini adalah untukmembandingkan hasil penelitian tentang pembentukan kerak CuCO3 pada pipa boilerkerak CuCO3 dan pada pipa simulasi dengan suhu 300-4000C. Kerak yang terbentuk kemudian dievaluasi menggunakan analisis karakteristik kerak dan SEM/EDX. Hasilpenelitian menunjukkan bahwa kerak memiliki pelat seperti morfologi dan kerak fasekristal yang ditemukan sebagian besar malasite. Berdasarkan hasil ini, kerak CuCO3 diBoiler memiliki kondisi panas yang sangat tinggi dan waktu panas yang lama membuatkerak CuCO3 berwarna hitam. Warna dan tekstur kerak CuCO3 pada pipa menunjukkanwarna yang lebih cerah. Kerak yang terbentuk kemudian dievaluasi menggunakananalisis SEM / EDX. Perbandingan analisis antara hasil analisis kerak CuCO3 pada pipaboiler dan pipa simulator menunjukkan hasil yang berbeda. Hasil analisis SEMmenunjukkan bahwa kristal yang dilakukan melalui eksperimen diambil dari boiler danpipa. Perbedaan morfologi dan komposisi antara sampel kedua adalah karena boiler lebihpanas daripada di pipa sehingga morfologi kristal CuCO3 dalam boiler lebih rapatdibandingkan di pipa.
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Novianto, Rizki. "PENANGANAN KERAK PADA HANDLING EQUIPMENT MACHINE." T R A K SI 18, no. 1 (July 12, 2019): 37. http://dx.doi.org/10.26714/traksi.18.1.2018.37.

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Pengerakan Ferro karbonat tidak hanya fenomena kristalisasi yang terbentuk dalam proses alami (biomineralization), tetapi merupakan masalah yang sering ditemui dalam berbagai alat berat seperti bulldozer (Alice et al., 2011). Hal ini disebabkan karena terdapatnya unsur-unsur pembentuk kerak seperti besi dan karbonat dalam jumlah yang melebihi kelarutannya pada peralatan berat. Kerak biasanya mengendap dan tumbuh pada peralatan industri seperti pada pipa pipa hidrolik alat berat. Kerak merupakan suatu deposit dari senyawa-senyawa anorganik yang terendapkan dan membentuk timbunan kristal pada permukaan suatu subtansi. Kerak merupakan suatu deposit dari senyawa-senyawa anorganik yang terendapkan dan membentuk timbunan kristal pada permukaan suatu subtansi. Hal ini disebabkan karena terdapatnya unsur-unsur pembentuk kerak seperti alkalin, magnesium, kalsium, klorid, sulfat dalam jumlah yang melebihi kelarutannya pada keadaan kesetimbangan. Kerak biasanya mengendap dan tumbuh pada peralatan industri seperti cooling tower, heat exchangers, pipe, casing manifold, tank dan peralatan industri lainnya
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Novianto, Rizki. "PENANGANAN KERAK PADA HANDLING EQUIPMENT MACHINE." T R A K SI 18, no. 1 (July 12, 2019): 37. http://dx.doi.org/10.26714/traksi.18.1.2018.37-51.

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Pengerakan Ferro karbonat tidak hanya fenomena kristalisasi yang terbentuk dalam proses alami (biomineralization), tetapi merupakan masalah yang sering ditemui dalam berbagai alat berat seperti bulldozer (Alice et al., 2011). Hal ini disebabkan karena terdapatnya unsur-unsur pembentuk kerak seperti besi dan karbonat dalam jumlah yang melebihi kelarutannya pada peralatan berat. Kerak biasanya mengendap dan tumbuh pada peralatan industri seperti pada pipa pipa hidrolik alat berat. Kerak merupakan suatu deposit dari senyawa-senyawa anorganik yang terendapkan dan membentuk timbunan kristal pada permukaan suatu subtansi. Kerak merupakan suatu deposit dari senyawa-senyawa anorganik yang terendapkan dan membentuk timbunan kristal pada permukaan suatu subtansi. Hal ini disebabkan karena terdapatnya unsur-unsur pembentuk kerak seperti alkalin, magnesium, kalsium, klorid, sulfat dalam jumlah yang melebihi kelarutannya pada keadaan kesetimbangan. Kerak biasanya mengendap dan tumbuh pada peralatan industri seperti cooling tower, heat exchangers, pipe, casing manifold, tank dan peralatan industri lainnya
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Septiani, Mimin, Kurniawan Santoso, and Rafdi Abdul Majid. "EFEKTIVITAS ASAM NITRAT (HNO3) SEBAGAI PELARUT ALTERNATIF PADA PROSES ACID WASH TERHADAP PLATE ELECTROLYZER DI PT KALTIM NITRATE INDONESIA." Journal of Chemical Process Engineering 3, no. 2 (January 25, 2019): 17. http://dx.doi.org/10.33536/jcpe.v3i2.258.

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Proses acid wash di electrochloronation merupakan proses pembersihan kerak menggunakan pelarut asam. Asam Chlorida (HCl) adalah pelarut asam yang paling umum digunakan untuk melarutkan kerak CaCO3. Penelitian ini bertujuan menentukan konsentrasi optimum HNO3 sebagai pelarut alternatif dengan mengkaji efektifitasnya menggunakan HCl sebagai pembanding. Sampel kerak diambil dari plate electrolyzer sebanyak 5 gram. Larutan HNO3 dan HCl diencerkan dalam beberapa variabel konsentrasi, 2%; 3%; 4%; 5%; dan 6%. Sampel CaCO3 dilarutkan dengan HNO3 dan HCl kemudian dihitung jumlah kerak yang terlarut. Banyaknya zat terlarut berbeda sesuai dengan konsentrasi pelarut.Hasil penelitian ini menunjukkan HCl dengan konsentrasi 3% tingkat kemolaran 0,83 M mampu melarutkan sebanyak 76,07% dari total sample kerak dan HNO3 dengan konsentrasi 5% tingkat kemolaran 0,81 M juga mampu melarutkan sebanyak 76,04% dari total sampel kerak CaCO3. Sehingga HNO3 dianggap mampu menjadi pelarut alteratif.
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Swastikawati, Ari, Fr Dian Ekarini, and Sri Wahyuni. "EFEKTIVITAS EDTA DALAM MEMBERSIHKAN LAPISAN KERAK PADA CAGAR BUDAYA BERBAHAN BATU." Jurnal Konservasi Cagar Budaya 7, no. 2 (June 2, 2017): 60–70. http://dx.doi.org/10.33374/jurnalkonservasicagarbudaya.v7i2.115.

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Candi-candi di Indonesia umumnya terletak di kawasan yang terbuka sehingga sangat terpengaruh dengan kondisi cuaca dan iklim sekitarnya. yang dapat memicu kerusakan dan pelapukan batu candi. Efek lingkungan yang sering ditemukan adalah mbulnya lapisan-lapisan kerak pada permukaan batu candi yang menutupi batu, yang dapat berupa endapan garam yang berwarna putih, maupun lumut (moss), algae (ganggang) dan lichen (jamur kerak). Kajian ini dilakukan dalam rangka untuk mencari metode yang tepat untuk membersihkan lapisan-lapisan kerak yang ada pada permukaan batu candi sehingga kelestariannya dapat terjaga. Metode pembersihan yang dilakukan adalah dengan menggunakan larutan EDTA (ethylene diamine tetraacetic acid) dengan berbagai konsentrasi untuk menentukan konsentrasi yang paling efektif untuk membersihkan lapisan kerak serta menentukan lamanya waktu kontak. Berdasarkan hasil kajian diperoleh data bahwa konsentrasi EDTA dan lamanya waktu kontak tidak berpengaruh terhadap tingkat kalarutan lapisan kerak yang ada di Candi Borobudur, Candi Mendut dan Candi Kalasan. Konsentrasi larutan EDTA 3-5% dengan waktu kontak 24 jam paling efektif melarutkan kalsium (Ca), magnesium (Mg) pada candi Kalasan dan Mendut, serta besi (Fe) dan tembaga (Cu) pada lapisan kerak di Candi Kalasan. Sementara itu, di lapisan kerak Candi Mendut larut maksimal dalam EDTA 15% waktu kontak 24 jam. Ca, Mg, Fe dan Cu pada lapisan kerak Candi Borobudur dapat larut secara maksimal dalam larutan EDTA dengan konsentrasi 10% dengan kontak waktu 24 jam. Dari analisis EDS (energy dispersive spectroscopy) komposisi lapisan kerak terdiri dari unsur logam dan non logam. Larutan EDTA hanya mampu melarutkan unsur logam dengan tingkat kelarutan yang sangat rendah, sedangkan unsur non logam tidak larut. Secara umum metode ini belum efektif untuk membersihkan lapisan kerak yang menempel pada batu candi.
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Widianto, Eri, Kardiman Kardiman, A. P. Bayuseno, and Stefanus Muryanto. "IDENTIFIKASI STRUKTUR KRISTAL DAN MORFOLOGI ENDAPAN KALSIUM KARBONAT (CaCO3) PADA PIPA TEMBAGA." Barometer 2, no. 2 (July 24, 2017): 60–63. http://dx.doi.org/10.35261/barometer.v2i2.907.

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Telah dilakukan penelitian tentang penumbuhan kerak kalsium karbonat (CaCO3) pada pipa uji tembaga menggunakan peralatan Closed Circuit Scale Simulator. Kerak CaCO3 dihasilkan dengan mereaksikan kristal CaCl2 dan NaNO3 yang dialirkan pada pipa uji dengan laju aliran tetap 35 ml/menit. Pada penelitian ini dilakukan penambahkan aditif berupa asam tartrat (C4H6O6) dengan konsentrasi 6 ppm. Karakterisasi sampel kerak menggunakan X-Ray Diffaction (XRD) dan Scanning Electron Microscopy (SEM) menunjukan bahwa endapan kerak yang dihasilkan merupakan kristal CaCO3 dengan fasa calcite berbentuk rhombohedral. Penambahan aditif asam tartrat 6 ppm mempengaruhi derajat kristalin CaCO3, terlihat jelas pada puncak intensitas yang menurun dan puncak-puncak bergeser ke arah sudut yang lebih besar. Morfologi kerak CaCO3 dengan penambahan aditif terlihat tidak homogen, menunjukkan bahwa penambahan aditif dapat menghambat proses kristalisasi. Dengan kata lain, penambahan aditif mampu menghambat laju pertumbuhan kristal, sehingga memungkinkan kerak yang terbentuk merupakan jenis softscale yang mudah untuk dibersihkan.
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Djati H. Salimy, Siti Alimah. "POTENSI PEMBENTUKAN KERAK PADA INSTALASI DESALINASI NUKLIR MED DENGAN AIR UMPAN DARI TELUK MANGGRIS." Majalah Ilmiah Pengkajian Industri 10, no. 3 (December 18, 2016): 149–56. http://dx.doi.org/10.29122/mipi.v10i3.2229.

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Pada tahun 2025 diperkirakan terjadi defisit kebutuhan air bersih pendudukPulau Bangka, dan jika diasumsi sekitar 30 % air bersih untuk penduduk danfasilitas PLTN dipasok dari instalasi desalinasi MED (Multi-Effect Distillation)dengan energi panas nuklir, maka kapasitas produksi 90.000 m3/hari. Salah satupermasalahan dalam instalasi desalinasi thermal adalah pembentukan kerakdalam permukaan perpindahan panas. Pembentukan kerak dalam instalasidesalinasi MED disebabkan oleh deposisi garam inorganik seperti kalsiumkarbonat, kalsium sulfat dan magnesium hidroksida. Kerak pada permukaanperpindahan panas dapat menurunkan laju perpindahan panas, yang akanberimplikasi pada penurunan kinerja dan efisiensi proses. Tujuan studi adalahmenganalisis potensi pembentukan kerak dalam instalasi desalinasi MED,dengan air umpan dari Teluk Manggris. Metode yang digunakan adalah kajianliteratur dan analisis berdasar perhitungan. Hasil studi menunjukkan bahwaterdapat potensi timbulnya kerak yang disebabkan oleh CaSO4 yangdiindikasikan dengan positifnya harga indeks pengerakan (SI) sebesar 23,408.Potensi timbulnya kerak CaCO3 tidak ada, karena diperoleh harga LSI negatifdengan nilai -0,63. Namun air potensial bersifat korosif sehingga pertimbangandalam pemilihan bahan alat perlu dilakukan. Selain itu juga terdapat potensiterbentuknya kerak Mg(OH)2.
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More sources

Dissertations / Theses on the topic "Kerak"

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Zaid, Sareeta. "Ethnicity in Archaeology: A case for Khirbet Kerak Ware in the Southern Levant." Thesis, Department of Archaeology, 2016. http://hdl.handle.net/2123/17945.

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Archaeological studies of ethnicity and identity have gained increasing momentum in the late 20th and early 21st centuries. This thesis is a critical examination of differing approaches to the interpretation of material culture in the detection of sociocultural identities. Theorisation in this field has often occurred in lieu of developing practical frameworks of analysis that are applicable to the material record. The lack of clarity arising from recurrent use of subjective concepts such as „ethnic identity‟ and „archaeological subject‟ without adequately defining these terms further hinders such studies. Instead, transparency and holism are paramount in considering archaeological identities due to the influential nature of the contexts in which the researcher and research subject are situated. This approach is particularly pertinent in the study of Khirbet Kerak Ware, a handmade and highly burnished red/ black ceramic occurring in a core morphological range in the Early Bronze III Southern Levant. Khirbet Kerak Ware differs in typology, decoration and manufacturing technique from other Southern Levantine pottery and does not demonstrate ceramic development in this region, indicating its foreign nature. Accordingly, trade, diffusion and migration have been proposed as possible mechanisms for the dissemination of Khirbet Kerak Ware. In particular, strong parallels have been noted between Khirbet Kerak Ware and the Kura-Araxes cultural complex of Anatolia and the Transcaucasus. This thesis provides insight into the Khirbet Kerak Ware phenomenon by investigating its origins and role within Southern Levantine society in a situational approach that aims to overcome many of the shortcomings of previous studies into archaeological ethnicity.
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Hoppe, Chantelle. "A thousand years of farming : agricultural practices from the Byzantine to early Ottoman period at Khirbet Faris, the Kerak Plateau, Jordan." Thesis, University of Sheffield, 2001. http://etheses.whiterose.ac.uk/4219/.

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This archaeobotanical analysis was carried out as part of the Khirbet Faris project: a multi- disciplinary archaeological study of a rural village on the Kerak plateau with a chronology dating from the Bronze Age to Ottoman period. It has contributed to the debate surrounding settlement, economic continuity and change and the influence of Islamic expansion on agricultural practices in this environmentally and politically marginal location. An ethnoarchaeological analysis, FIBS (Functional Interpretation of Botanical studies), was carried out to aid the interpretation of crop management practices from archaeobotanical remains. Results of the analysis have indicated general continuity in agricultural activity from the Byzantine to early Ottoman periods: Free threshing wheats, barley, pulses, fig, olive and vine were all cultivated throughout this period. The samples were rich and of mixed origin, and typically dominated by cereal grain and chaff (mostly cleaned barley and wheat grain and chaff). Settled farmers seem to have adopted a mixed economy, utilising a range of crops together with animal herds. Crop residues were used to feed herds and the dung used as fuel, to varying degrees across the site, throughout the Islamic period. Contrary to Watson's (1983) belief that free-threshing wheats were introduced at the time of Islamic expansion, as part of a wider agricultural revolution, these crops seem to have been cultivated from at least the Byzantine period. Signs of agricultural change appear from the 13th century A. D. New, `exotic' crops: cotton, sorghum, watermelon, pistachio and citrus fruit. Analogy with FIBS evidence suggests irrigation may have been introduced at this time. These `introductions' appear first in the mid-Islamic period, not at the advent of Islamic expansion as Watson describes, perhaps due to the marginal location of Kerak. It is questionable whether these `exotic' crops were cultivated or imported as they are present at a low frequency in the samples. Irrigation evidence comes from the weeds of winter cereal crops so there is no direct evidence for the irrigation of `exotic' summer crops. It is, therefore, uncertain to what extent these introductions affected the local landscape and economy. The success of the FIBS analysis in aiding interpretation of the archaeobotanical assemblage, in terms of crop management practices, is encouraging for future archaeobotanical research.
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Gharaibeh, Ahmed. "Environmental impact assessment on oil shale extraction in Central Jordan." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2017. http://nbn-resolving.de/urn:nbn:de:bsz:105-qucosa-226424.

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This study focuses on the environmental impact assessment of trace elements concentrations in spent shale, which is the main residual besides gas and steam from the utilization of oil shale. The study area El-Lajjun covers 28 km2, located in the centre of Jordan approximately 110 km south of Amman. It belongs mainly to the Wadi Mujib catchment and is considered to be one of the most important catchments in Jordan. The Wadi El-Lajjun catchment area (370 km2) consists of two main aquifer systems: The intermediate aquifer (Amman Wadi As Sir Aquifer or B2/A7) and the deep sandstone aquifer (Kurnub/Ram Group Aquifer). The B2/A7 aquifer (Upper Cretaceous) is considered as the main source of fresh water in Jordan. El-Lajjun oil shale was deposited in a sedimentary basin and comprises massive beds of brown-black, kerogen-rich, bituminous chalky marl. The oil shale was deposited in shallow marine environment. It is by definition a sedimentary rock containing organic material in the rock matrix. The shale oil extraction is an industrial process to decompose oil shale and to convert the kerogen into shale oil by hydrogenation, pyrolysis or by a thermal dissolution. Several classifications of extraction technologies are known; the classification with respect to the location where the extraction takes place distinguishes between off-site, on-site, and in situ. The oil shale utilization may have serious repercussions on the surrounding environment if these issues are not investigated and evaluated carefully. Ten representative oil shale rock samples with a total weight about 20 kg were collected from different localities of oil shale exposures in the study area. A standardized laboratory Fischer Assay test was performed with the samples to determine oil shale characteristics and to obtain spent shale, which was used in this study for further investigations. Sequential extraction was used to evaluate the changes in the mobility and distribution of the trace elements: Ti, V Cr, Co, Zn, As Zr, Cd, Pb and U. Column leaching experiments were performed to simulate the leaching behavior of the above elements from oil shale and spent shale to evaluate the possible influence on the groundwater in the study area. The concentrations in the leachate were below the maximum contaminant levels of the Environmental Protection Agency (EPA) for drinking water and the Jordanian standards for drinking water. An immobilization method by using Kaolin was applied to reduce the mobilization and bioavailability of the trace elements fraction that are contained in the spent shale. Immobilization was evaluated as a function of liquid-solid ratio (solid-liquid partitioning) and as a function of pH. A comparison between the results obtained from column leaching experiments and the results that were obtained from immobilization for the oil shale and spent shale samples indicated that the immobilization reduced the mobility of the trace element except for Ti, V, and Cr. However, even the concentrations of these elements were lower than the maximum acceptable limits of the Jordanian Standard Specifications for waste water. The catchment of the study area (Wadi El-Lajjun catchment) is ungauged. Therefore, the soil conservation service (SCS) runoff curve number method was used for predicting direct runoff from rainfall. The results obtained showed that the infiltration of water is very small (approximately 0.6 cm/year) and rarely can´t reach the groundwater through the oil shale beds. Thus, a contamination of groundwater is unlikely under normal conditions. DRASTIC was used to assess groundwater vulnerability for the B2/A7 aquifer with respect to pollution by oil shale utilization. The aquifer vulnerability map shows that the area is divided into three zones: low (risk index 10-100; intermediate (risk index 101–140) and high groundwater vulnerability (risk index 141-200). The high risk areas are small and mainly located in the northeastern corner of the El-Lajjun graben, where the hydraulic conductivity is relatively high and rocks are highly fractured and faulted. The water table of the deep sandstone aquifer (Kurnub/Ram group) in the El-Lajjun area is relatively deep. At least two geological formations above the Kurnub aquifer are aquitards and protect the deep aquifer. However, the area is highly fractured and thus there is a certain possibility for contact with surface pollutants. Finally, further research with respect to trace elements including REE elements and isotopes in the intermediate and deep sandstone aquifers are highly recommended. Isotopic signatures will be very helpful to investigate to which extend hydraulic connections between the aquifers exist. Further and in particular mineralogical studies on the spent shale and the possibilities for industrial utilization are recommended because huge quantities of spent shale are expected. Because most oil shale extraction technologies especially the power generation require considerable amounts of water detailed studies on water supply for the oil shale treatment have to be performed.
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Colérus, Lovisa, and Karla Rehn. "Automatic sleep scoring using Keras." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-239370.

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Sleep scoring is a diagnosis tool used for medical research. Using electroencefalography (EEG) a researcher observes the electrical activity in the brain and classifies the EEG into different stages. The goal of this project is to develop a tool for automatic classification of sleep data from rodents, one of the most common test subjects in modern medical research. EEG data from AstraZeneca is used to train a neural network, developed with Keras. Some augmentation of the data is done to increase the accuracy. The data is classified into different sleep stages with 91% accuracy.
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Rehn, Klara, and Lovisa Colérus. "Automatic Sleep Scoring Using Keras." Thesis, KTH, Skolan för teknikvetenskap (SCI), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-230905.

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Sleep scoring is a diagnosis tool used for medical research. Using electroencefalography (EEG) a researcher observes the electrical activity in the brain and classifies the EEG into different stages. The goal of this project is to develop a tool for automatic classification of sleep data from rodents, one of the most common test subjects in modern medical research. EEG data from AstraZeneca is used to train a neural network, developed with Keras. Some augmentation of the data is done to increase the accuracy. The data is classified into different sleep stages with 91% accuracy.
Sömnklassifiering är ett verktyg för att diagnostistera sömn. Det används vid medicinsk forskning. Genom elektroencefalografi (EEG) observerar en forskare den elektriska aktiviteten i hjärnan och klassifierar sen EEG:n i olika stadier, i detta fall vaken, REM och NREM. Projektets mål är att utveckla ett verktyg för automatisk klassifiering av sömndata från råttor, ett av de vanligaste försöksdjuren i modern medicinsk forskning. EEG-data från Astra Zeneca används för att träna ett neural nätverk som utvecklats i Keras. Viss augmentering av datan görs för att öka träffsäkerheten. Datan klassifieras i de tre stadierna med 91% träffsäkerhet.
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Iersel, Adrianus Henricus Maria van Spanjersberg Marijke. "Vrede leren in de Kerk /." Kampen : J. H. Kok, 1993. http://catalogue.bnf.fr/ark:/12148/cb37061717g.

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Swart, Francois Johannes 1957. "Kerk en onderwys : 'n kerkregtelike studie van artikel 67 van die Kerkorde van die Nederduitse Gereformeerde Kerk (1998)." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52905.

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Thesis (DTh)--Stellenbosch University, 2002
ENGLISH ABSTRACT: The aim of this study is to determine if the current church order (section 67, 1998) of the Dutch Reformed Church meet the needs of the changing multireligious society in South Africa. Education has always been an instrument to guide and teach people. The Bible is clear about the important role of teaching and education of young people. It is therefore imperative for the Church to have clear guidelines about its role in providing Christian education and religious studies in schools. From the earliest days the Reformed Churches have been involved in education and had described the relationship between the Church and Education in its church orders. The comparatives research is reflected in this study. The implications of the constitutional principles dealing with "Freedom of Religion" within a multi-religious society are explored. A model for religious education is recommended. Within the constitutional provision for "freedom of association" parents have the right to choose in which religion their children be educated. It is suggested that the State should only provide the infrastructure for the education, whereas the different religious communities should have the freedom to determine the content of religious studies. No religious community should have preference/advantage over the other. There are four main roleplayers in the education arena, namely the State as infrastructure provider, the teachers as facilitators of the educational process, the Church as the proclaimer of the Word, and the parents as the primary decisionmakers and educators. In accordance with the new Constitution each roleplayer should have the freedom to express their unique input in the educational process. For the Dutch Reformed Church the ultimate authority lies in the Word of God. Therefore the implications of the Constitution and the Bill of Rights must be tested in the light of the Word of God. If there is not sufficient opportunity to proclaim the Word of God in public. schools, the Church will be obliged to assist their members to establish independent Christian schools. In the light of the changing multi-cultured and relious society, suggestions for the reformulation of church order section 67, 1998, are made.
AFRIKAANSE OPSOMMING: Hierdie studie fokus op die vraag of die huidige Kerkordelike bewoording wat die verhouding tussen Kerk en Onderwys beskryf (Kerkorde artikel 67, 1998) aan die vereistes van die tyd voldoen. Die onderwys was nog altyd 'n instrument waarmee menselewens grootliks beinvloed is. 'n Kerk wat nie daarmee rekening hou nie, bewys 'n onguns aan die samelewing, en aan die Koninkryk van God. Daar word heelwat in die Skrif gepraat oor die verantwoordelikheid van opvoeding en onderwys teenoor jongmense. 'n Kerkordelike vergestalting van Skriftuurlike konfessionele en teologiese uitgangspunte aangaande die jeug se opvoeding kan 'n bate wees in die debat oor die verhouding tussen die Kerk en Onderwys. Vir die Kerk as draer van die Woord, bepaalde waardes, etos en norme is dit belangrik om 'n spesifieke kerkorde artikel te he wat riglyne vir godsdiensonderrig en Christelike onderwys in skole bied. In die studie word aangetoon dat die Gereformeerde kerke van die vroegste tye af sterk uitsprake oor die onderwys gemaak het, en dit ook kerkordelik verwoord het. Die grondwetlike beginsel van "Vryheid van Godsdiens" binne 'n multigodsdienstige samelewing soos Suid-Afrika word ook ondersoek. Die slotsom waartoe gekom word, is dat daar in 'n diverse samelewing soos Suid-Afrika 'n veelkantige model van godsdiensonderrig ingestel behoort te word. Die grondwet maak voorsiening vir religieuse studies, maar ook vir die dogmatiese bestudering en beoefening van godsdiens in staatsondersteunde opvoedingsinstansies. Binne die "reg van vrye assosiasie" kan ouers self kies in watter godsdiens sy kind onderrig mag ontvang. Die staat behoort alleenlik die ruimte/geleentheid in staatskole te skep vir sy burgers om in vryheid godsdiens te mag beoefen. Die inhoud en wyse van aanbieding behoort aan die verskillende godsdienstige gemeenskappe oorgelaat te word. Omdat dit die Kerk se taak is om die Woord te verkondig, behoort die kerk te bepaal wat die kurrikulum van godsdiensonderrig is, en watter dogmas/waarheid verkondig moet word. In 'n sekere sin is dit 'n terugkeer na die ou gereformeerde tradisie van die sestiende eeu toe die kategetiese dogmatiese beginsels van die kerk in dagskole geleer is. Die verskil h§ egter daarin dat een godsdiens nie vandag bevoordeel word bo die ander nie, maar dat daar ruimte gemaak word vir aile godsdienste onder die "Vryheid van Godsdiens" beginsel in die grandwet van Suid-Afrika. Die rol van die Staat as ruimte-skepper vir die onderwys, die opvoedkundiges as die fasiliteerders van die onderwysgebeure, die kerk as Woordverkondiger en die ouers as prirnere opvoeders en besluitnemers lewer elkeen In unieke bydrae om die leerder op te voed in sy totale menswees. Die interpretasie van "Vryheid van Godsdiens" in die grondwet mag nie daartoe lei dat bogenoemde vier rolspelers se bydrae op enige manier aan bande gele word nie, maar moet juis aan hulle oorgelaat word. Die insette van elke ralspeler in die onderwysgebeure moet erken en gerespekteer word. Die uitdaging Ie in die hantering en bestuur van In diverse samelewing in een gemeenskaplike opvoedings- of skoolstelsel. As elkeen se rol en bydrae gesamentlik en afsonderlik helder qedefineer word, kan dit net tot voordeel van die religieuse ontwikkeling van die leerders wees. Die Nederduitse Gereformeerde Kerk buig aileen onder die gesag van Jesus Christus as die Hoof van die Kerk en Koninkryk. Die Bybel is deurslaggewend in sy lewens- en wereldsbeskouinq. Daaram behoort die implikasies van die "Grandwet van Suid-Afrika" en die "Handves van Menseregte" altyd getoets en geweeg te word in die lig van die Woord. Indien dit sou blyk dat daar nie voldoende ruimte vir Christelike opvoeding en onderwys by staatskole bestaan nie, sal dit die kerk noodsaak om sy lidmate by te staan om eie "Christelike skole" op te rig. Op hierdie wyse bly die Nederduits Gereformeerde Kerk getrau aan sy tradisie om In belydende standpunt jeens opvoeding en onderwys te handhaaf. Riglyne word gegee vir die daarstelling van In moontlike hergeformuleerde kerkorde. Sodoende word die kerk en skool se verhouding binne die multireligieuse samelewing nuut beskryf in die lig van die Woord.
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Beukes, Cornelius Johannes. "'n Postmoderne redekritiek vir kerk en teologie." Acess to E-Thesis, 2007. http://upetd.up.ac.za/thesis/available/etd-01182007-141522/.

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Chen, Weihe. "The landscape painting of Li Keran and its special qualities." Thesis, Durham University, 1997. http://etheses.dur.ac.uk/995/.

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Pretorius, Tyrone Brian. "Betrokkenheid van lidmate by die kerk as n..funksie van lidmaathoudings ten opsigte van Godsdiens en van lidmaatpersepsie van die kerk se Psigososiale klimaat. Betrokkenheid van lidmate by die kerk as n..funksie van lidmaathoudings ten opsigte van Godsdiens en van lidmaatpersepsie van die kerk se Psigososiale klimaat." University of the Western Cape, 1987. http://hdl.handle.net/11394/8460.

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Magister Artium (Psychology) - MA(Psych)
The aim of the present study was to determine whether church involvement can be conceptualized as a function of both organizational and personal factors. For the purposes of this study the psychosocial climate of the church served as an organizational factor while religious attitudes served as personal factors. A further aim of the study was to determine to what extent the church can be seen as a support system that serves as a buffer against stressors. Subjects consisted of 214 congregation members of 10 different churches that were spread out over the areas of Bellville-South, Kuilsriver and Belhar in the Cape Peninsula. Subjects completed five questionnaires: the Church climate scale (CCS), the Involvement in the church scale (ICS), the Survey of religious attitudes (SRA), a psychological well-being questionaire (RIF) and a biographical questionnaire. The relationship between the different variables were determined by means of product moment correlations, stepwise multiple regression and Chi-square analyses. The analysis of the significance of the differences between more involved and less involved church members was performed by means of Rotelling's T2 statistic. It was found that, according to the psychometric measures applied: the dimensions of the psychosocial climate of the church plays a limited role in the prediction of church insignificance as a predictor of church involvement in the final multiple regression analysis which involved all independent variables simultaneously. Orthodox religious beliefs had a positive relationship with church involvement, while inner religious conflicts had a negative relationship with church involvement. there was no relationship between church involvement and psychological well-being. orthodoxy, income, normative clarity and educational qualifications were the only significant predictors of church involvement. more involved and less involved members differed significantly and the difference between the two groups can be attributed to orthodoxy of religious beliefs. Although the results of the main investigation did not fully confirm the researcher's expectations, the intercorrelations between the different variables produced a number of interesting findings. The Church climate scale produced the following significant correlations with the other variables: ( i) "Normative clarity" correlated negatively with the experience of inner religious conflicts as well as the experience of anxiety, depression and global psychological well-being. It however correlated positively with educational qualifications. Chi-square analyses further showed that married persons, received a high level church. compared to unmarried per the persons, of "normative clarity" within "Sense of community" correlated positively with the level of religious orthodoxy and negatively with the experience of anxiety. (iii)"Social concern correlated positively with the level of religious orthodoxy as well as with sex (men percieved a higher level of social concern within the church than women) . (iv) "Openness to change" correlated positively with the level of religious orthodoxy as well as with sex (men percieved a higher level of social concern within the church than women)
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Books on the topic "Kerak"

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Ziëmuḣammadov, Bŭri. Barkamol avlodni voi͡aga etkazish sirlari: Bu kitob ḣar kimga kerak, ḣar kunga kerak. Toshkent: "Sano-standart", 2011.

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S, Chesson Meredith, and Darnell John Coleman, eds. Results of the 2001 Kerak Plateau Early Bronze Age survey. Boston, MA: American Schools of Oriental Research, 2006.

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Ėl-i͡urt kerak ėkan odamga: Uĭqu qochganda (tundaliklar) : sheʺrlar, badiiĭ ŭĭlar, mushoḣadalar. Toshkent: Ghafur Ghulom nomidagi nashriët-matbaa izhodiĭ uĭi, 2012.

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Mukhtorov, Omon. Odamlar kulishlari kerak: Roman, khaëliĭ manzaralar, ḣikoi︠a︡lar va turfa ḣangomalar, ën daftardan, zamondosh latifalari. Toshkent: Maʺnaviiat, 2008.

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Die Beziehungen Moabs zu Israel und Ägypten in der Eisenzeit: Siedlungsarchäologische und siedlungshistorische Untersuchungen im Kernland Moabs (Ard el-Kerak). Wiesbaden: In Kommission bei O. Harrassowitz, 1990.

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Alois Musil in the Arḍ el-Kerak: A compendium of Musil's itineraries. observations and comments from surveys in 2005-2006. Frankfurt am Main: Peter Lang, 2007.

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Gestel, Carel van. Van kerk naar kerk. Zaltbommel: Aprilis, 2007.

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Gestel, Carel van. Van kerk naar kerk. Zaltbommel: Aprilis, 2007.

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Kurokawa, Hiroyuki. Kera. Tōkyō: Shinchōsha, 2009.

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Li Keran. Shijiazhuang Shi: Hebei jiao yu chu ban she, 2000.

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Book chapters on the topic "Kerak"

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Bährle-Rapp, Marina. "kerat(o)..., Kerat(o) ..." In Springer Lexikon Kosmetik und Körperpflege, 297. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_5566.

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Schell, Uli. "Keras/Tensorflow." In Maschinelles Lernen mit R, 273–327. München: Carl Hanser Verlag GmbH & Co. KG, 2022. http://dx.doi.org/10.3139/9783446472440.010.

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Stepputat, Kendra. "Kecak Behind the Scenes — Investigating the Kecak Network." In Dance Ethnography and Global Perspectives, 116–32. London: Palgrave Macmillan UK, 2014. http://dx.doi.org/10.1057/9781137009449_7.

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Manaswi, Navin Kumar. "CNN in Keras." In Deep Learning with Applications Using Python, 105–14. Berkeley, CA: Apress, 2018. http://dx.doi.org/10.1007/978-1-4842-3516-4_8.

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Ketkar, Nikhil. "Introduction to Keras." In Deep Learning with Python, 97–111. Berkeley, CA: Apress, 2017. http://dx.doi.org/10.1007/978-1-4842-2766-4_7.

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Moolayil, Jojo. "Keras in Action." In Learn Keras for Deep Neural Networks, 17–52. Berkeley, CA: Apress, 2018. http://dx.doi.org/10.1007/978-1-4842-4240-7_2.

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Sahin, Özgür. "Integrating Keras Models." In Develop Intelligent iOS Apps with Swift, 137–64. Berkeley, CA: Apress, 2020. http://dx.doi.org/10.1007/978-1-4842-6421-8_7.

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Long, Liangqu, and Xiangming Zeng. "Keras Advanced API." In Beginning Deep Learning with TensorFlow, 283–314. Berkeley, CA: Apress, 2022. http://dx.doi.org/10.1007/978-1-4842-7915-1_8.

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Montesinos López, Osval Antonio, Abelardo Montesinos López, and Jose Crossa. "Artificial Neural Networks and Deep Learning for Genomic Prediction of Binary, Ordinal, and Mixed Outcomes." In Multivariate Statistical Machine Learning Methods for Genomic Prediction, 477–532. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-89010-0_12.

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AbstractIn this chapter, we provide the main elements for implementing deep neural networks in Keras for binary, categorical, and mixed outcomes under feedforward networks as well as the main practical issues involved in implementing deep learning models with binary response variables. The same practical issues are provided for implementing deep neural networks with categorical and count traits under a univariate framework. We follow with a detailed assessment of information for implementing multivariate deep learning models for continuous, binary, categorical, count, and mixed outcomes. In all the examples given, the data came from plant breeding experiments including genomic data. The training process for binary, ordinal, count, and multivariate outcomes is similar to fitting DNN models with univariate continuous outcomes, since once we have the data to be trained, we need to (a) define the DNN model in Keras, (b) configure and compile the model, (c) fit the model, and finally, (d) evaluate the prediction performance in the testing set. In the next section, we provide illustrative examples of training DNN for binary outcomes in Keras R (Chollet and Allaire, Deep learning with R. Manning Publications, Manning Early Access Program (MEA), 2017; Allaire and Chollet, Keras: R interface to Keras’, 2019).
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Bisong, Ekaba. "TensorFlow 2.0 and Keras." In Building Machine Learning and Deep Learning Models on Google Cloud Platform, 347–99. Berkeley, CA: Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-4470-8_30.

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Conference papers on the topic "Kerak"

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Winarni, Rina Wahyu, Dendi Pratama, Anna Nurfarkhana, Ariefika Listya, and Atiek Nur Hidayati. "Cultural Identity Construction in Betawi Fashion System of Kerak Telor Sellers." In 1st International Conference on Folklore, Language, Education and Exhibition (ICOFLEX 2019). Paris, France: Atlantis Press, 2020. http://dx.doi.org/10.2991/assehr.k.201230.008.

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Soliman, Aiman, and Jeffrey Terstriep. "Keras Spatial." In SIGSPATIAL '19: 27th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems. New York, NY, USA: ACM, 2019. http://dx.doi.org/10.1145/3356471.3365240.

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Pina, Débora, Liliane Neves, Daniel de Oliveira, and Marta Mattoso. "Captura Automática de Dados de Proveniência de Experimentos de Aprendizado de Máquina com Keras-Prov." In Anais Estendidos do Simpósio Brasileiro de Banco de Dados. Sociedade Brasileira de Computação - SBC, 2021. http://dx.doi.org/10.5753/sbbd_estendido.2021.18165.

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Neste artigo apresentamos a Keras-Prov, uma extensão à biblioteca de aprendizado profundo Keras para prover dados de proveniência. A Keras-Prov captura, armazena e gerencia metadados e dados de proveniência de experimentos de aprendizado de máquina (ML), em especial de aprendizado profundo. A Keras-Prov identifica automaticamente as transformações de dados mais comuns, como, treinamento, teste, e adaptação, para capturar os dados de proveniência. A Keras-Prov flexibiliza a captura automática, permitindo que novos dados de proveniência sejam definidos, como valores adicionais de hiperparâmetros. À gerência de proveniência por meio do SGBD colunar MonetDB, Keras-Prov adiciona uma interface de monitoramento visual e um gerador de SQL para consultas analíticas aos dados durante a evolução do treinamento e a escolha de modelos. A análise de dados da Keras-Prov, durante o treinamento, subsidia decisões de sintonia fina de hiperparâmetros. A base de dados segue a recomendação W3C PROV, favorecendo a comparação, explicação e reprodução de tais experimentos de ML. A Keras-Prov é uma solução de código aberto e pode ser obtida em https://github.com/dbpina/keras-prov.
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Shorten, Connor, and Taghi M. Khoshgoftaar. "KerasBERT: Modeling the Keras Language." In 2021 20th IEEE International Conference on Machine Learning and Applications (ICMLA). IEEE, 2021. http://dx.doi.org/10.1109/icmla52953.2021.00041.

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Wang, Rong, and Toru Wakahara. "Practice in Caption Generation with Keras." In the 2019 3rd International Conference. New York, New York, USA: ACM Press, 2019. http://dx.doi.org/10.1145/3342999.3343004.

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Tejakumar, Donthu, Mahardi, I.-Hung Wang, Kuang-Chyi Lee, and Shinn-Liang Chang. "Predicting Surface Roughness using Keras DNN Model." In 2020 IEEE Eurasia Conference on IOT, Communication and Engineering (ECICE). IEEE, 2020. http://dx.doi.org/10.1109/ecice50847.2020.9301928.

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Arora, Shefali, and M. P. S. Bhatia. "Handwriting recognition using Deep Learning in Keras." In 2018 International Conference on Advances in Computing, Communication Control and Networking (ICACCCN). IEEE, 2018. http://dx.doi.org/10.1109/icacccn.2018.8748540.

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Maurya, Aakash, and Vandana Sharma. "Facial Emotion Recognition Using Keras and CNN." In 2022 2nd International Conference on Advance Computing and Innovative Technologies in Engineering (ICACITE). IEEE, 2022. http://dx.doi.org/10.1109/icacite53722.2022.9823480.

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Vidnerová, Petra, and Roman Neruda. "Evolving KERAS Architectures for Sensor Data Analysis." In 2017 Federated Conference on Computer Science and Information Systems. IEEE, 2017. http://dx.doi.org/10.15439/2017f241.

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Abdellaoui, Benyoussef, Aniss Moumen, Younes El Bouzekri El Idrissi, and Ahmed Remaida. "Training the Fer2013 Dataset with Keras Tuner." In INTERNATIONAL CONFERENCE ON BIG DATA, MODELLING AND MACHINE LEARNING (BML'21). SCITEPRESS - Science and Technology Publications, 2021. http://dx.doi.org/10.5220/0010735600003101.

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