Z' Physics and Supersymmetry

We review the status of heavy neutral gauge bosons, Z', with emphasis on constraints that arise in supersymmetric models, especially those motivated from superstring compactifications. We first summarize the current phenomenological constraints and the prospects for Z' detection and diagnostics at the LHC and NLC. After elaborating on the status and (lack of) predictive power for general models with an additional Z', we concentrate on motivations and successes for Z' physics in supersymmetric theories in general and in a class of superstring models in particular. We review phenomenologically viable scenarios with the Z' mass in the electroweak or in the intermediate scale region.Comment: 30 pages. To appear in Perspectives in Supersymmetry, World Scientific, ed. G. L. Kan

Critical Conductance of a Mesoscopic System: Interplay of the Spectral and Eigenfunction Correlations at the Metal-Insulator Transition

We study the system-size dependence of the averaged critical conductance $g(L)$ at the Anderson transition. We have: (i) related the correction $\delta g(L)=g(\infty)-g(L)\propto L^{-y}$ to the spectral correlations; (ii) expressed $\delta g(L)$ in terms of the quantum return probability; (iii) argued that $y=\eta$ -- the critical exponent of eigenfunction correlations. Experimental implications are discussed.Comment: minor changes, to be published in PR

Odwrócenie związanych z płcią różnic w stężeniu leptyny u otyłych dzieci z zaburzoną tolerancją glukozy

Introduction: Basal leptin level has been demonstrated to correlate positively with many indices of obesity, as well as insulin resistance. However, to date, little is known about regulation of leptin in obese children with incipient glucose metabolic disorders. Objective: The aim of this study was to define the precise influence of the glucose tolerance status on plasma leptin in obese boys and girls separately. Material and methods: 70 obese children with impaired glucose tolerance (IGT) and well-matched 70 normal glucose-tolerant (NGT) subjects were examined. Fasting and 2-h post glucose load plasma glucose and insulin levels as well as fasting leptin levels were determined, apart from anthropometric measurements. Results: Leptin levels were significantly lower in girls with IGT compared to NGT girl (17.7±6.5 µg/L vs. 23.1±7.7 µg/L; pWstęp: Stężenia leptyny korelują z wieloma wskaźnikami otyłości, jak również z insulinoopornością. Dotychczas niewiele natomiast wiadomo o regulacji poziomu leptyny u otyłych dzieci z początkowymi fazami zaburzeń metabolizmu glukozy. Celem pracy było ustalenie wpływu zaburzeń tolerancji glukozy na poziom leptyny u dzieci z otyłością prostą, w zależności od płci.Materiał i metody: Badania przeprowadzono u 70 otyłych dzieci z zaburzeniami tolerancji glukozy (IGT) i odpowiednio dobranej grupie 70 dzieci z otyłością i prawidłową tolerancją glukozy (NGT). Oznaczono stężenia w surowicy krwi leptyny oraz glukozy i insuliny na czczo i w 120 minucie testu doustnego obciążenia glukozą (OGTT). U badanych dzieci oceniono wybrane parametry antropometryczne.Wyniki: Stężenie leptyny w surowicy krwi dziewcząt z IGT było znamiennie niższe niż dziewcząt z NGT (odpowiednio: 17,7±6,5 µg/L i 23,1±7,7 µg/L;

Neutral hydrogen cloud distances and the strength of the interstellar magnetc field

If HI clouds exist in pressure equilibrium in an environment where gas pressure is a function of z-distance and if HI cloud density is a function of z-distance, it can be shown that a quantity called the Virial Measure is a function of z-distance. The Virial Measure is that distance at which a cloud would be in gravitational equilibrium if its internal kinetic temperature is indicated by profile linewidth. The Virial Measure is derived from observed cloud parameters and has been calibrated for clouds of known distance so that it can be used to determine the distance to other HI clouds. The magnitude of various terms in the virial equation can thus be derived for several hundred HI clouds. It is demonstrated that the strength of the interstellar magnetic field is a function of z-distance

Penggunaan Anti Buih Polipropilen Glikol Untuk Evaporasi Limbah Radioaktif Cair Yang Mengandung Detergen

[The Use of Anti-Foam Polypropylene Glycol for The Evaporation of Liquid Radioactive Waste That Contains Detergent]Radiation work clothes washing operation in Radioactive Waste Treatment Plant Batan, Puspiptek, Serpong raises 133,7 m3 of liquid waste containing detergent concentration of 1,496 g/l, the activity of at least 10-6 Ci/m3, and the main radioactive elements in the waste is Cs-137. Afterward, the waste mixed with other similar liquid waste from reactors and fabrication facilities radioisotopes, then processed through evaporation. When evaporation was running, emergence of foam can cause carry-over that led to distillate contaminated. In order to prevent foam that may cause carry-over, it's needed anti-foam to defuse foam. Anti-foam material that can be used in the process of evaporation of liquid radioactive waste containing detergents are silicone oil and polyethylene glycol [1, 3]. Anti-foam material other than silicon oil and polyethylene glycol is polypropylene glycol [2, 3]. Polypropylene glycol is more viscous than the silicone oil and polyethylene glycol so that tend to insoluble which means polypropylene glycol more effective to reduce the amount of foam as polypropylene glycol layer formed on the surface of the foam does not support liquid foam, better than the silicone oil and polyethylene glycol [4]. Ethylene glycol was considerably toxic compared propylene glycol. Moreover, propylene glycol is an anti-foam compounds are safe and environmentally friendly as well as a renewable products derived from bio-glycerol derivative [5]. This study uses simulated waste with Cs-137 activity 14,8 Bq / ml, the content of dry extract 5 g / l, and the variation of the detergent concentration 0,1247 g/l ; 0,1496 g/l ; 0,187 g/l ; 0,374 g/l ; 0,748 g/l ; dan 1,496 g/l. The results of this study is the use of anti-foam in the process of evaporation on the detergent concentration 0,1247 g / l to 0,187 g / l, very effective, because the distillate activity without the use of anti-foam and anti-foam provides a significant difference. The use of anti-foam in the process of evaporation on the detergent concentration 0,374 g / l to 1,496 g / l does not provide a significant difference. In the detergent concentration more than 1,496 g / l of liquid surface can not be controlled with anti-foam. At the area level of 0,1247 to 1,496 g / l flow rate of addition of polypropylene glycol anti foam compound follows the equation: y = 0,086 ln (x) + 0,660; where y is the anti-foam stream velocity in ml / min and x is the detergent concentration in g / l

It\^o calculus and jump diffusions for GG-L\'evy processes

The paper considers the integration theory for $G$-L\'evy processes with finite activity. We introduce the It\^o-L\'evy integrals, give the It\^o formula for them and establish SDE's, BSDE's and decoupled FBSDE's driven by $G$-L\'evy processes. In order to develop such a theory, we prove two key results: the representation of the sublinear expectation associated with a $G$-L\'evy process and a characterization of random variables in $L^p_G(\Omega)$ in terms of their quasi-continuity