Band Distributions for Quantum Chaos on the Torus

Band distributions (BDs) are introduced describing quantization in a toral phase space. A BD is the uniform average of an eigenstate phase-space probability distribution over a band of toral boundary conditions. A general explicit expression for the Wigner BD is obtained. It is shown that the Wigner functions for {\em all} of the band eigenstates can be reproduced from the Wigner BD. Also, BDs are shown to be closer to classical distributions than eigenstate distributions. Generalized BDs, associated with sets of adjacent bands, are used to extend in a natural way the Chern-index characterization of the classical-quantum correspondence on the torus to arbitrary rational values of the scaled Planck constant.Comment: 12 REVTEX page

Antiresonance and Localization in Quantum Dynamics

The phenomenon of quantum antiresonance (QAR), i.e., exactly periodic recurrences in quantum dynamics, is studied in a large class of nonintegrable systems, the modulated kicked rotors (MKRs). It is shown that asymptotic exponential localization generally occurs for $\eta$ (a scaled $\hbar$) in the infinitesimal vicinity of QAR points $\eta_0$. The localization length $\xi_0$ is determined from the analytical properties of the kicking potential. This ``QAR-localization" is associated in some cases with an integrable limit of the corresponding classical systems. The MKR dynamical problem is mapped into pseudorandom tight-binding models, exhibiting dynamical localization (DL). By considering exactly-solvable cases, numerical evidence is given that QAR-localization is an excellent approximation to DL sufficiently close to QAR. The transition from QAR-localization to DL in a semiclassical regime, as $\eta$ is varied, is studied. It is shown that this transition takes place via a gradual reduction of the influence of the analyticity of the potential on the analyticity of the eigenstates, as the level of chaos is increased.Comment: To appear in Physical Review E. 51 pre-print pages + 9 postscript figure

Perbandingan Investasi Revitalisasi Bangunan Pasar Tradisional Di Kota Semarang

Pasar tradisional Indonesia menurun, baik dari jumlahnya maupun orientasi masyarakat karena beberapa faktor, seperti kurangnya infrastruktur dan ketidaknyamanannya. Sehingga, pasar tradisional seharusnya mempunyai suatu daya saing dan daya tarik untuk mempertahankan keberadaannya dalam jangka panjang. Untuk merevitalisasi pasar tradisional diperlukan investasi yang relatif cukup besar. Pada tahun 2016, pemeritah kota Semarang menyiapkan investasi untuk revitalisasi pasar tradisional sekitar 61,2 milyar rupiah. Investasi revitalisasi bangunan pasar tradisional harus seharusnya dapat memberikan manfaat bagi para stakeholder. Penelitian dilakukan untuk membandingkan investasi revitalisasi beberapa bangunan pasar tradisional yang di Kota Semarang agar selanjutnya diperoleh acuan pola investasi revitalisasi pasar tradisional yang dapat dijadikan masukan terhadap pemerintah dalam melakukan revitalisasi. Data primer yang digunakan pada penelitian diperoleh dari wawancara dan observasi. Wawancara dilakukan terhadap Dinas Pasar, pedagang, pembeli, dan kepala pasar. Data sekunder berupa DED dan RAB, data pedagang dan fasilitas pasar seperti kios dan los. Ada tiga pasar yang dijadikan objek penelitian yaitu Pasar Pedurungan, Peterongan dan Rasamala. Analisa investasi revitalisasi pasar tradisional ini dibagi menjadi aspek sosial, aspek teknis dan non teknis serta aspek ekonomi. Hasil analisis dari aspek sosial menunjukkan bahwa pemerintah telah dapat memberikan pelayanan yang lebih baik kepada masyarakat dan juga meningkatkan perekonomian. Secara umum, rencana revitalisasi ketiga pasar tersebut sudah dapat memenuhi standar teknis dan non teknis pasar tradisional. Hasil analisis dari aspek ekonomi yaitu selama 20 tahun umur ekonomis bangunan maka Pasar Rasamala dinilai paling layak. NPV Pasar Rasamala bernilai positif sebesar Rp12,801,195,084.82 dengan B/C Ratio yaitu 5,1 dan IRR 13,99%

Pengaruh Dukungan Dan Hubungan Sosial Terhadap Niat Membeli Produk Pada Social Commerce

The emergence of social networking sites, particularly Facebook, encouraging the emergence of a new paradigm in e-commerce, known as social commerce (s-commerce). S-commerce business model is currently a trend in the commercial world. Based on literature studies that have been done, we obtained two factors in the behavior and interaction of social networking site Facebook users that affect a person's intention to make purchases through social media, there is social support and relationship quality. This study aims to conduct research on the relationship between social commerce intention, social support, and relationship quality, through a questionnaire survey conducted online to Facebook users by using purposive sampling method. Data results of the questionnaire that has been collected, then analyzed quantitatively by using PLS. From the analysis and quantitative testing can be concluded that social commerce intention on Facebook as a medium s-commerce is affected by relationship quality on social media itself (in this case Facebook), and are not directly affected by the social support that occurred on social media Facebook . However, it is known that social support on Facebook has a direct influence on the quality of the relationship quality between the user and Facebook as a medium of s-commerce

The three species monomer-monomer model in the reaction-controlled limit

We study the one dimensional three species monomer-monomer reaction model in the reaction controlled limit using mean-field theory and dynamic Monte Carlo simulations. The phase diagram consists of a reactive steady state bordered by three equivalent adsorbing phases where the surface is saturated with one monomer species. The transitions from the reactive phase are all continuous, while the transitions between adsorbing phases are first-order. Bicritical points occur where the reactive phase simultaneously meets two adsorbing phases. The transitions from the reactive to an adsorbing phase show directed percolation critical behaviour, while the universal behaviour at the bicritical points is in the even branching annihilating random walk class. The results are contrasted and compared to previous results for the adsorption-controlled limit of the same model.Comment: 12 pages using RevTeX, plus 4 postscript figures. Uses psfig.sty. accepted to Journal of Physics

The Synergistic Contribution of Lactobacillus and Dietary Phytophenols in Host Health

Phytophenols are found ubiquitously among all plants. They are important in diets rich in fruits and vegetables because these compounds provide health benefits to the host, ultimately decreasing the incidence of chronic diseases. These compounds act as natural antioxidants and provide anti-inflammatory, antiviral, antibiotic, and antineoplastic properties. Reactive oxygen species (ROS) are produced under normal physiological functions, and low/moderate levels are required for cellular turnover and signaling. However, when ROS levels become too high, oxidative stress can occur. Phytophenols quench ROS and ultimately avoid the damaging effects ROS elicit on the cell. The highest source of bioavailable phytophenols comes from our diet as a component usually esterified in plant fiber. For phytophenols to be absorbed by the body, they must be released by esterases, or other related enzymes. The highest amount of esterase activity comes from the gastrointestinal (GI) microbiota; therefore, the host requires the activity of mutualistic bacteria in the GI tract to release absorbable phytophenols. For this reason, mutualistic bacteria have been investigated for beneficial properties in the host. Our laboratory has begun studying the interaction of Lactobacillus johnsonii N6.2 with the host since it was found to be negatively correlated with type 1 diabetes (T1D). Analyses of this strain have revealed two important characteristics: (1) It has the ability to release phytophenols from dietary fiber through the secretion of two strong cinnamoyl esterases and (2) L. johnsonii also has the ability to generate significant amounts of H2O2, controlling the activity of indoleamine 2,3-dioxygenase (IDO), an immunomodulatory enzyme

Demographic Factors, Duration and Costs of Hospitalization, and Causes of Death in Patients Intoxicated with Opioids and Amphetamines

Background: Intoxications are medical emergencies and among the significant causes of morbidity and mortality worldwide. In recent years, prevalence of intoxication with opioids and stimulants, such as amphetamines, is increasing particularly among young people. In this study, we investigated demographic factors, duration of hospitalization, costs of hospitalization, and cause of death in patients intoxicated with amphetamines and opioids.Materials and Methods: This study was a prospective descriptive–analytic study. Sampling method was census, and Subjects were patients intoxicated with amphetamines and opioids, alone or combined, who referred to toxicology ward of Ali-Asghar hospital in Isfahan, from October 2009 to April 2010.Results: During 6 months, among 2325 subjects, 419 patients used opioids, 98 patients used amphetamines, and 25 patients used both of them. The mean age of patients in the three groups was not significantly different. Most patients were male in all groups. The most common route of intoxication was orally in opioid group and inhalation in amphetamine group. The most common cause of intoxication was intentional attempt. Vital signs at admission were normal in three groups, but the average of heart rate, body temperature, respiratory rate and blood pressure, was slightly higher in the amphetamine group than the opioid group. Duration and cost of hospitalization were not significantly different between groups. Four patients were died totally and the outcome was not significantly different between groups. The mean age and duration of hospitalization were significantly higher in died compared to living patients.Conclusion: Opioids and amphetamines accounted for high percentages of intoxication, especially in young single men with self-employed job. Therefore, control and prevention of opioids and amphetamines consumption are important ways to reduce this kind of intoxication in this group

A Rigorous Path Integral for Supersymmetric Quantum Mechanics and the Heat Kernel

In a rigorous construction of the path integral for supersymmetric quantum mechanics on a Riemann manifold, based on B\"ar and Pf\"affle's use of piecewise geodesic paths, the kernel of the time evolution operator is the heat kernel for the Laplacian on forms. The path integral is approximated by the integral of a form on the space of piecewise geodesic paths which is the pullback by a natural section of Mathai and Quillen's Thom form of a bundle over this space. In the case of closed paths, the bundle is the tangent space to the space of geodesic paths, and the integral of this form passes in the limit to the supertrace of the heat kernel.Comment: 14 pages, LaTeX, no fig

Universal diffusion near the golden chaos border

We study local diffusion rate $D$ in Chirikov standard map near the critical golden curve. Numerical simulations confirm the predicted exponent $\alpha=5$ for the power law decay of $D$ as approaching the golden curve via principal resonances with period $q_n$ ($D \sim 1/q^{\alpha}_n$). The universal self-similar structure of diffusion between principal resonances is demonstrated and it is shown that resonances of other type play also an important role.Comment: 4 pages Latex, revtex, 3 uuencoded postscript figure