101 research outputs found
Query Response TIME Comparison Nosqldb Mongodb with Sqldb Oracle
Penyimpanan data saat ini terdapat dua jenis yakni relational database dan non-relational database. Kedua jenis DBMS (Database Managemnet System) tersebut berbeda dalam berbagai aspek seperti per-formansi eksekusi query, scalability, reliability maupun struktur penyimpanan data. Kajian ini memiliki tujuan untuk mengetahui perbandingan performansi DBMS antara Oracle sebagai jenis relational data-base dan MongoDB sebagai jenis non-relational database dalam mengolah data terstruktur. Eksperimen dilakukan untuk mengetahui perbandingan performansi kedua DBMS tersebut untuk operasi insert, select, update dan delete dengan menggunakan query sederhana maupun kompleks pada database Northwind. Untuk mencapai tujuan eksperimen, 18 query yang terdiri dari 2 insert query, 10 select query, 2 update query dan 2 delete query dieksekusi. Query dieksekusi melalui sebuah aplikasi .Net yang dibangun sebagai perantara antara user dengan basis data. Eksperimen dilakukan pada tabel dengan atau tanpa relasi pada Oracle dan embedded atau bukan embedded dokumen pada MongoDB. Response time untuk setiap eksekusi query dibandingkan dengan menggunakan metode statistik. Eksperimen menunjukkan response time query untuk proses select, insert, dan update pada MongoDB lebih cepatdaripada Oracle. MongoDB lebih cepat 64.8 % untuk select query;MongoDB lebihcepat 72.8 % untuk insert query dan MongoDB lebih cepat 33.9 % untuk update query. Pada delete query, Oracle lebih cepat 96.8 % daripada MongoDB untuk table yang berelasi, tetapi MongoDB lebih cepat 83.8 % daripada Oracle untuk table yang tidak memiliki relasi.Untuk query kompleks dengan Map Reduce pada MongoDB lebih lambat 97.6% daripada kompleks query dengan aggregate function pada Oracle
Konsistensi dan Kerugian Penerapan Ketentuan Insentif Pajak
Insentif pajak umumnya diberlakukan dalam upaya menarik investasi kususnya investasi asing kedalam suatu negara. Jenis-jenis insentif antara lain: pengurangan tarih PPh, tax holidays ( tidak dikenakan PPh untuk suatu perode tertentu, investment allowances dan tax credits ( pengurangan pajak didasarkan atas jumlah investasi), penyusutan dipercepat, pembebasan atas pajak tak langsung dll. Dalam pelaksanaannya insentif pajak selalu menuai perdebatan yang panjang apakah benar insentif pajak yang diberikan itu dapat berpengaruh menarik investasi atau sebaliknya apakah justru merugikan penerimaan negara. Bagi yang setuju berpendapat bahwa insentif diperlukan untuk meningkatkan investasi dan kemudian dapat menciptakan lapangan kerja dan keuntungan sosial ekonomi lainnya
The Analysis of the Bank Interest Influence and Exchange Rate Towards Composite Stock Price Index in Indonesia Using Vector Error Correction Model Approach
This study aims to analyze the influence of bank interest and exchange rate towards composite stock price index in Indonesia under the period of January 2010-December 2016. The method applied is Vector Error Correction Model (VECM). The findings show that this method aces to show the pace of adjusting balance from the short period up to long period towards stock price index variable. The gap between bank interest level and the exchange rate has the low impact towards composite stock price index. For a longer period, the exchange rate would bring negative impact to composite stock price in Indonesia. Meanwhile, in a short period, it would not affect exchange rate and bank interest rate towards stock price index in Indonesia.
Keywords: Stock Price, Exchange Rate, Vector Error Correction Model, Bank Interest Rat
Tinjauan Pendampingan Pastoral Terhadap Remaja yang Kecanduan Game Online di HKBP Magelang
Penelitian ini bertujuan untuk menganalisa untuk mengkaji remaja yang kecanduan game online oleh remaja HKBP Magelang dari perspektif pendampingan pastoral. Penelitian ini dianalisis dengan menggunakan Teori Pendampingan Pastoral. Metode yang digunakan yaitu metode kualitatif dengan jenis penelitian deskriptif analisis. Penelitian kualitatif memiliki pengertian sebagai penelitian yang dilakukan secara intensif, terperinci terhadap suatu lembaga, organisme atau gejala yang melalui data berupa kata-kata yang tertulis maupun tidak tertulis atau lisan dari perilaku dan orang orang yang diamati. Teknik pengumpulan data yang digunakan di dalam penelitian ini yaitu metode wawancara. Hasil dari penelitian ini yaitu kecanduan game online yang dialami oleh remaja HKBP Magelang disebabkan oleh beberapa faktor seperti adanya perasaan tertantang, perasaan bangga, rasa bosan, dan lingkungan pertemanan. Dampak negatif kecanduan game online yaitu pada aspek spiritual mereka tidak dapat fokus terhadap aktivitas rohaniah dan kurang aktif dalam kegiatan gerejawi seperti ibadah, pendalaman alkitab, doa, refleksi pribadi, melainkan mereka lebih memilih menghabiskan waktu dengan handphone untuk bermain game online. Hasil penelitian yang ditemukan oleh penulis yaitu Gereja HKBP Magelang telah menerapkan pendampingan pastoral yang berlandaskan pada edukasi. Pendampingan pastoral yang dilakukan oleh HKBP sangat penting karena telah menolong remaja HKBP Magelang untuk bertumbuh mengaktualisasikan dirinya terlebih agar tidak bertumbuh menjadi pribadi yang berperilaku buruk akibat kecanduan game online
Metastability in Josephson transmission lines
Thermal activation and macroscopic quantum tunneling in current-biased
discrete Josephson transmission lines are studied theoretically. The degrees of
freedom under consideration are the phases across the junctions which are
coupled to each other via the inductances of the system. The resistively
shunted junctions that we investigate constitute a system of N interacting
degrees of freedom with an overdamped dynamics. We calculate the decay rate
within exponential accuracy as a function of temperature and current. Slightly
below the critical current, the decay from the metastable state occurs via a
unique ("rigid") saddlepoint solution of the Euclidean action describing the
simultaneous decay of the phases in all the junctions. When the current is
reduced, a crossover to a regime takes place, where the decay occurs via an
"elastic" saddlepoint solution and the phases across the junctions leave the
metastable state one after another. This leads to an increased decay rate
compared with the rigid case both in the thermal and the quantum regime. The
rigid-to-elastic crossover can be sharp or smooth analogous to first- or
second- order phase transitions, respectively. The various regimes are
summarized in a current-temperature decay diagram.Comment: 11 pages, RevTeX, 3 PS-figures, revised versio
Quantum Nucleation in a Ferromagnetic Film Placed in a Magnetic Field at an Arbitrary Angle
We study the quantum nucleation in a thin ferromagnetic film placed in a
magnetic field at an arbitrary angle. The dependence of the quantum nucleation
and the temperature of the crossover from thermal to quantum regime on the
direction and the strength of the applied field are presented. It is found that
the maximal value of the rate and that of the crossover temperature are
obtained at a some angle with the magnetic field, not in the direction of the
applied field opposite to the initial easy axis.Comment: 15 pages, RevTex, 3 PostScript figures. To appear in Phys. Rev.
Crossovers in the thermal decay of metastable states in discrete systems
The thermal decay of linear chains from a metastable state is investigated. A
crossover from rigid to elastic decay occurs when the number of particles, the
single particle energy barrier or the coupling strength between the particles
is varied. In the rigid regime, the single particle energy barrier is small
compared to the coupling strength and the decay occurs via a uniform
saddlepoint solution, with all degrees of freedom decaying instantly.
Increasing the barrier one enters the elastic regime, where the decay is due to
bent saddlepoint configurations using the elasticity of the chain to lower
their activation energy. Close to the rigid-to-elastic crossover, nucleation
occurs at the boundaries of the system. However, in large systems, a second
crossover from boundary to bulk nucleation can be found within the elastic
regime, when the single particle energy barrier is further increased. We
compute the decay rate in the rigid and in the elastic regimes within the
Gaussian approximation. Around the rigid-to-elastic crossover, the calculations
are performed beyond the steepest descent approximation. In this region, the
prefactor exhibits a scaling property. The theoretical results are discussed in
the context of discrete Josephson transmission lines and pancake vortex stacks
that are pinned by columnar defects.Comment: 13 pages, RevTeX, 7 PS-figure
Macroscopic Quantum Tunneling of a Fluxon in a Long Josephson Junction
Macroscopic quantum tunneling (MQT) for a single fluxon moving along a long
Josephson junction is studied theoretically. To introduce a fluxon-pinning
force, we consider inhomogeneities made by modifying thickness of an insulating
layer locally. Two different situations are studied: one is the quantum
tunneling from a metastable state caused by a single inhomogeneity, and the
other is the quantum tunneling in a two-state system made by two
inhomogeneities. In the quantum tunneling from a metastable state, the decay
rate is estimated within the WKB approximation. Dissipation effects on a fluxon
dynamics are taken into account by the Caldeira-Leggett theory. We propose a
device to observe quantum tunneling of a fluxon experimentally. Required
experimental resolutions to observe MQT of a fluxon seem attainable within the
presently available micro-fabrication technique. For the two-state system, we
study quantum resonance between two stable states, i.e., macroscopic quantum
coherence (MQC). From the estimate for dissipation coefficients due to
quasiparticle tunneling, the observation of MQC appears to be possible within
the Caldeira-Leggett theory.Comment: 30 pages LaTeX including 11 PS figures, using jpsj.sty. To be
published on J. Phys. Soc. Jpn. Overestimates for damping amplitude is
correcte
Magnetic Field Dependence of Macroscopic Quantum Tunneling and Coherence of Ferromagnetic Particle
We calculate the quantum tunneling rate of a ferromagnetic particle of diameter in a magnetic field of arbitrary angle. We consider the
magnetocrystalline anisotropy with the biaxial symmetry and that with the
tetragonal symmetry. Using the spin-coherent-state path integral, we obtain
approximate analytic formulas of the tunneling rates in the small -limit for the magnetic field normal to the easy axis (), for the field opposite to the initial easy axis (),
and for the field at an angle between these two orientations (). In addition, we obtain numerically the tunneling rates for
the biaxial symmetry in the full range of the angle of the magnetic
field (), for the values of \epsilon =0.01 and
0.001.Comment: 25 pages of text (RevTex) and 4 figures (PostScript files), to be
published in Phys. Rev.
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