Basis for finding exact coherent states

One of the outstanding problems in the dynamical systems approach to turbulence is to find a sufficient number of invariant solutions to characterize the underlying dynamics of turbulence [Annu. Rev. Fluid Mech. 44, 203 (2012)]. As a practical matter, the solutions can be difficult to find. To improve this situation, we show how to find periodic orbits and equilibria in plane Couette flow by projecting pseudorecurrent segments of turbulent trajectories onto the left-singular vectors of the Navier-Stokes equations linearized about the relevant mean flow (resolvent modes). The projections are, subsequently, used to initiate Newton-Krylov-hookstep searches, and new (relative) periodic orbits and equilibria are discovered. We call the process project-then-search and validate the process by first applying it to previously known fixed point and periodic solutions. Along the way, we find new branches of equilibria, which include bifurcations from previously known branches, and new periodic orbits that closely shadow turbulent trajectories in state space

Kepuasan Pemustaka terhadap Pemanfaatan Software Senayan di Perpustakaan Perguruan Tinggi Fakultas Kedokteran Bagian Neurologi Universitas Diponegoro

Penelitian ini berjudul Kepuasan Pemustaka Terhadap Pemanfaatan Software Senayan di PerpustakaanPerguruan Tinggi Fakultas Kedokteran Bagian Neurologi Universias Diponegoro. Tujuan dari penelitianini adalah untuk mengetahui kepuasan pemustaka terhadap pemanfaatan software perpustakaan yangterpasang di Perpustakaan Peruruan Tinggi Bagian Neurologi Universitas Diponegoro. Softwareperpustakaan yang terpasang adalah software senayan dengan versi portabel atau psenayan. Metodepenelitian yang digunakan dalam penelitian ini adalah metode kualitatif. Teknik analisis data yangmenggunakan model interaktif menurut Miles & Huberman (1986) berupa reduksi data, penyajian data,dan verifikasi. Informan dalam penelitian ini berjumlah lima orang residen. Pemilihan residen untukmenjadi informan dalam penelitian harus memenuhi kriteria tertentu dan berdasarkan tujuan tertentu(purposive sampling). Teknik pengumpulan data yang digunakan adalah observasi, wawancara, dan studipustaka. Berdasarkan analisis data terhadap hasil wawancara yang telah dilakukan oleh peneliti, diperolehsimpulan bahwa sebagian besar merasa puas setelah memanfaatkan software senayan yang dipasang diPerpustakaan Perguruan Tinggi Bagian Neurologi Fakultas Kedokteran Universitas Diponegoro.Kepuasan para residen dapat tersirat dari setiap jawaban yang mewakili lima indikator kepuasan, isi(content), akurasi (accuracy), format (format), kemudahan (easy of use) dan ketepatwaktuan (timeliness).Kesimpulan terakhir dari penelitian adalah para residen merasa puas terhadap software senayandikarenakan kemudahan senayan guna mencari koleksi perpustakaan

Water use efficiency of potato (Solanum tuberosum L.) under different irrigation methods and potassium fertilizer rates

AbstractThis study was conducted to determine the effect of different irrigation methods and potassium fertilizers on potato yield in the Abu–Graib–Baghdad, Iraq Region, during season 2011–2012. Potato was grown under furrow and drip irrigation methods and three potassium fertilizers rates applied with 0.0, 300 and 600kg K2SO4ha−1. The obtained results indicated that, actual potato evapotranspiration ranged from 357.3 to 511.4mm in the growth season for all treatments. Furrow and drip irrigation methods had no significant effect on tuber yield under the experiential conditions. Potassium fertilizer influenced the tuber yield (P<0.05), and the highest tuber yield was registered for 600kg K2SO4ha−1, reaching 35.23Tha−1and 36.65Tha−1for furrow and drip irrigation, respectively. Water use efficiency increased from 5.129 to 7.379kgm−3 for furrow-irrigated treatments, and from 6.907 to 10.257kgm−3 for drip-irrigated treatments using the above mentioned rate of K-fertilizer

Kebutuhan Dan Pencarian Informasi Oleh Siswa Di Perpustakaan Smk Negeri 11 Semarang

Penelitian ini mengkaji tentang kajian pemakai perpustakaan. Penelitian ini sendiri untuk mengetahui kebutuhan dan pencarian informasi siswa dalam menelusur informasi yang dilakukan di Perpustakaan SMK Negeri 11 Semarang. Permasalahan yang dikaji adalah bagaimana kebutuhan dan pencarian informasi siswa di Perpustakaan SMK Negeri 11.Penelitian ini merupakan penelitian diskriptif kuantitatif dengan bentuk studi kasus, dengan populasi sejumlah 1517 orang siswa dan sampel sejumlah 160 orang siswa. Untuk memperoleh data yang valid penulis menggunakan beberapa metode pengumpulan data yaitu menggunakan angket/ kuesioner, observasi, dan wawancara. Untuk mengkatagorikan tingkat gejala yang diamati yaitu kebutuhan dan pencarian informasi siswa di Perpustakaan SMK Negeri 11 adalah dengan distribusi frekuensi. Hasil penelitian ini menunjukkan bahwa siswa membutuhkan sumber dan sarana informasi yang lain. Hal tersebut ditunjukkan dengan sebagian besar tujuan mereka berkunjung ke Perpustakaan SMK Negeri 11 untuk mengerjakan tugas dari guru. Adapun motivasi untuk datang ke Perpustakaan SMK Negeri 11, sebagian besar adalah karena menyelesaikan tugas yang sedang dikerjakan. Jenis informasi yang dibutuhkan responden adalah mapel .Bentuk informasi berupa buku teks yang dibutuhkan di perpustakaan. Pemanfaatan bahan pustaka khususnya buku yang dipinjam pada umumnya adalah antara 2 sampai dengan 4 buku dalam satu bulan. Selanjutnya cara penelusuran informasi yang dilakukan oleh hampir setengah siswa adalah mencari sendiri langsung ketempat koleksi dan hamper setengah siswa bertanya langsung ke petugas perpustakaan. Untuk upaya pencarian informasi selain di perpustakaan SMK Negeri 11, setengah dari siswa adalah mencari informasi yang sejenis melalui internet. Alasan siswa mencari di tempat lain adalah koleksi tidak ada dan hamper setengah yang lain sebagai bahan perbandingan koleksi yang lain

Entrepreneurship Antecedent on Student (Case : Female Students Final Year on Gunadarma University)

The purpose of this study is to examine and identify antecedents of female student entrepreneurial intention. This research attempts to investigate whether self-efficacy, perceptions of opportunities, prior knowledge of other entrepreneurs, and fear of failure are predictors of female student intention to be entrepreneur. As much as 233 students in their final year, selected proportionally from 12 study programs in Gunadarma University participated in the survey. Data was collected using questionnaire. The results suggest that self-efficacy and perceptions of opportunities were antecedent for entrepreneur intention, while prior knowledge of other entrepreneurs and the fear of failure were not a determining factor for female student entrepreneurial intention

Pengaruh Kebijakan Dividen dan Kebijakan Hutang terhadap Harga Saham (Studi Kasus : Lq45 di Bursa Efek Indonesia (Bei)

This study aims to examine and explain the interrelationships between the variables dividend policy and debt policy on stock prices . In addition, this study also wants to determine the effect of a variable dividend policy and debt policy on stock prices. Data used in this research is quantitative data, while sumberdata used in this study are secondary data from the company's annual report. This study used purposive sampling method and obtained 15 LQ45 company listed in Indonesia Stock Exchange with a four-year study period is 2009-2012. The analysis used is multiple regression analysis at a significance level of 0.05 % . The results of this study indicate that in partial dividend policies have a significant effect on stock prices . For debt policy variable has no significant effect on stock prices . While simultaneously dividend policy and debt policies have a significant effect on stock prices

Studi Tentang Variabilitas Klorofil-a Dan Net Primary Productivity Di Perairan Morosari, Kecamatan Sayung, Demak

Perairan Pantai Morosari, Demak merupakan perairan yang disekitarnya terdapat pemukiman penduduk, industri wisata serta aktifitas nelayan dan memberikan dampak terhadap kualitas perairan. Tujuan penelitian ini adalah mengetahui variabilitas klorofil-a dan net primary productivity serta mengetahui pengaruh hidrodinamika yaitu arus pasang surut terhadap lingkungan perairan di daerah pesisir. Distribusi parameter diolah menggunakan software ArcGIS 9.3 sedangkan data sekunder sebagai variabel pendukung disajikan dengan vektor arus dengan software SMS 10.1. Hasil analisis laboratorium untuk konsentrasi klorofil-a menunjukkan nilai tertinggi diperoleh pada sampling tanggal 23 Maret pada stasiun 4 (vegetasi mangrove) sebesar 0,4564 mg/m3. Nilai terendah diperoleh pada pengambilan sampel pada tanggal 22 April di stasiun 6 (bekas pertambakan) sebesar 0,0063 mg/m3. Hasil konsentrasi net primary productivity (NPP) menunjukkan nilai tertinggi diperoleh pada sampling tanggal 23 Maret 2014 pada stasiun 3 (mangrove) sebesar 256,2500 mgC/m3/jam. Nilai terendah di peroleh pada pengambilan sampel pada tanggal 22 April 2014 di stasiun 5 (bekas pertambakan) sebesar 4,6875 mg C/ m3/jam. Perairan Morosari, Demak memiliki variabilitas klorofil-a dan net primary productivity dengan sebaran yang yang berpindah setiap bulan dari muara sungai ke laut dan lebih banyak dipengaruhi oleh mixing proses pengadukan untuk muara sungai, traping nutrien dan dekomposisi untuk vegetasi mangrove serta pengendapan untuk di perairan yang agak jauh dari pantai. Variabel hidrodinamika di Perairan Morosari, Demak secara dominan adalah arus dengan kecepatan arus berkisar nilai 0,019 - 0,164 m/detik menuju ke arah Timur

Karakteristik Set Yogurt Sinbiotik dengan Penambahan Variasi Konsentrasi Ekstrak Kacang Hijau

Synbiotic set yogurt with the addition of mung bean extract has the potential as an alternative functional food that can meet the needs of people who want to have a healthy life. Mung beans are a source of prebiotics because they contain oligosaccharides in the form of raffinose and stakiose. The addition of mung bean extract concentration in the synbiotic set yogurt aims to determine the effect of increasing the concentration of mung bean extract on the microbiological, chemical, and acceptability characteristics of the synbiotic set yogurt and determine the concentration of mung bean extract that produces the best synbiotic set yogurt based on SNI. This study used a completely randomized design (CRD) with four treatments, namely P1 (15% mung beans extract), P2 (20% mung beans extract), P3 (25% mung beans extract) and P4 (30% mung beans extract). Based on the results of the research that has been done, it can be concluded that the addition of mung bean extract to the synbiotic set yogurt has a significant effect on microbiological values (prebiotics, pH, and total lactic acid bacteria), acceptability values (taste, color, texture, and overall attributes) and chemical values (ash and lactic acid content). But not significantly different from the aroma attribute. The best concentration of synbiotic set yogurt with the addition of varying concentrations of mung bean extract is found in treatment P1 (mung bean extract 15%), namely prebiotic levels of 2.6 x 108 CFU/ml, pH 3.83, total Bal 3.2 x 107 CFU/ml, ash content 0.73%, total lactic acid 0.54%, taste 1.84, aroma 2.16, color 1.60, texture 1.72 and overall 1.8

Characteristics and Origin of Sedimentary-Related Manganese Layers in Timor Island, Indonesia

DOI: 10.17014/ijog.v8i4.169Sedimentary-related manganese layers have been discovered in South Central Timor Regency, Timor Island, Indonesia, which is tectonically active and being uplifted due to north-trending tectonic collision between Timor Island arc and Australian continental crust. The manganese layers of 2 to 10 cm-wide interbed with deep sea sedimentary rocks including reddish - reddish brown claystone, radiolarian chert, slate, marl as well as white and pinkish calcilutite of Nakfunu Formations. Stratigraphically, the rock formations are underlain by Bobonaro Formation. Two types of manganese ores found comprise manganese layers and manganese nodule. The manganese layers strongly deformed, lenticular, and segmented, are composed of manganite [MnO(OH)], groutite [MnO(OH)], pyrolusite (MnO2), lithioporite (Al,Li) MnO2(OH)2, and hollandite [Ba (Mn4+, Mn2+)8O16] associated with gangue minerals including calcite, quartz, limonite [FeO(OH)], hematite (Fe2O3), and barite (BaSO4). Whilst the nodule type is only composed of manganite and less limonite. Geochemically, the manganese layers have grade of 63 - 72 wt.% MnO, whereas the nodule one has grade of 63 - 69 wt.% MnO. Generally, iron in Mn ore is very low ranging from 0.2 to 1.54 wt.% Fe2O3, averaged 0.76 wt.%. Hence, Fe/Mn ratio which is very low (0.003 - 0.069), typically indicates a sedimentary origin, which is also supported by petrologic and petrographic data showing layering structure of manganite and lithioporite crystal/grain. Trace element geochemistry indicates that manganese ore was precipitated in a reduction condition. Rare earth element (REE) analysis of manganese ore shows an enrichment of cerium (Ce) suggesting that the ore is basically originated in a marine environment. The manganese nodule is interpreted to be formed by chemical concretion process of unsoluble metals (i.e. mangan, iron) in seawater (hydrogenous) and precipitated on deep sea bottom. On the other hand, the manganese layer is a detrital diagenetic deposit formed by Mn remobilization in seawater column, precipitated and sedimented on the deep sea bottom. Manganese layers have probably been influenced by ‘hydrothermal process' of mud-volcano activities, proven by the presence of quartz and barite veinlets cutting the Mn layers, manganite recrystallization to be pyrolusite along veinlets cutting manganite and lithioporite layers, and the presence of pyrite and sulphur associated with Mn layers. Field data also exhibit that the significant manganese layers are mostly found around mud volcanoes. The closely spatial and genetic relationships between manganese layers and mud-volcanoes might also be an important guide for the exploration of Mn deposit in the region