Correlation function of spin noise due to atomic diffusion

We use paramagnetic Faraday rotation to study spin noise spectrum from unpolarized Rb vapor in a tightly focused probe beam in the presence of N$_2$ buffer gas. We derive an analytical form for the diffusion component of the spin noise time-correlation function in a Gaussian probe beam. We also obtain analytical forms for the frequency spectrum of the spin noise in the limit of a tightly focused or a collimated Gaussian beam in the presence of diffusion. In particular, we find that in a tightly focused probe beam the spectral lineshape can be independent of the buffer gas pressure. Experimentally, we find good agreement between the calculated and measured spin noise spectra for N$_2$ gas pressures ranging from 56 to 820 torr.Comment: 6 pages, 4 figure

SOCIAL PROJECT AGAINST OTHERING: “THE RYHTHM OF LOVE”

Although the numbers differ it is estimated about 600.000- 1.000.000 Gypsy oriented citizen live within the borders of Turkey. The gypsies have first moved to Anatolia in the 16th century but many gypsy families have brought into Turkey after the Lausanne Treaty. Gypsies as well as the Jews were the first two minority groups who have adopted and internalized the Turkish identity enforced by the Kemalist politicians. Unfortunately it seems the gypsy attempt towards the acceptance of Turkish National and religious identity does not damp the othering process which the gypsies face with in Turkey. The social right to accomplish educational facilities without being supressed by secret boundaries created in the Turkish Society is one of the major disadvantages of the gypsy society today. This paper will discuss a social project being carried out by TOG (Volunteers of the Society Foundation) at Bandırma region which fight against the othering process gypsy youngsters have to face with throughout their educational life. “The Ryhtm of Love Project” tries to give an opportunity to the gypsian youngsters who continue their educational life by improving their musical talents within their spare times. The project also proved out those gypsian students who is participating the project have both improved their educational- social talents and began to sweep out the difficulties they came across on the way up to their university careers

Closed form Greens functions for general sources and stratified media

Cataloged from PDF version of article.The closed-form Green's functions of the vector and scalar potentials in the spatial domain are presented for the sources of horizontal electric, magnetic, and vertical electric, magnetic dipoles embedded in general, multilayer, planar media. First, the spectral domain Green's functions in an arbitrary layer are derived analytically from the Green's functions in the source layer by using a recursive algorithm. Then, the spatial domain Green's functions are obtained by adding the contributions of the direct terms, surface waves, and complex images approximated by the Generalized Pencil of Functions Method (GPOF). In the derivations, the main emphasis is to put these closed-form representations in a suitable form for the solution of the mixed potential integral equation (MPIE) by the method of moments in a general three-dimensional geometry. The contributions of this paper are: 1) providing the complete set of closed-form Green's functions in spectral and spatial domains for general stratified media; 2) using the GPOF method, which is more robust and less noise sensitive, in the derivation of the closed-form spatial domain Green's functions; and 3) casting the closed-form Green's functions in a form to provide efficient applications of the method of moments. © 1995 IEE

Sub-femtotesla scalar atomic magnetometer using multipass cells

Scalar atomic magnetometers have many attractive features but their sensitivity has been relatively poor. We describe a Rb scalar gradiometer using two multi-pass optical cells. We use a pump-probe measurement scheme to suppress spin-exchange relaxation and two probe pulses to find the spin precession zero crossing times with a resolution of 1 psec. We realize magnetic field sensitivity of 0.54 fT/Hz$^{1/2}$, which improves by an order of magnitude the best scalar magnetometer sensitivity and surpasses the quantum limit set by spin-exchange collisions for a scalar magnetometer with the same measurement volume operating in a continuous regime.Comment: 5 pages, 4 figure

Delivering bad news to followers: leaders' cognitive reappraisal vs. suppression requests on followers' emotion regulation and leader-follower relations

We investigated the effects of leaders’ emotional regulation request (suppression or cognitive reappraisal) on follower’s felt and expressed anger and attitudes, as well as the effect of follower’s expressed anger on leaders’ attitudes toward followers. Study 1 using a 2x3 experimental design, examined the role of a hypothetical female/male leader’s suppression/cognitive-reappraisal request following the delivery of bad news on followers’ (229 undergraduates) felt/expressed anger and attitudes toward the leader. Results indicated that leader’s reappraisal request was more successful in decreasing felt anger compared to a control condition as well as decreasing expressed anger compared to both suppression request and control condition. Female leaders who requested suppression were evaluated less favorably than male leaders when followers held stereotypical attitudes towards female leadership. Study 2 showed that leaders’ (n = 32 executives) are more likely to perceive the expressed anger of followers’ and develop negative attitudes towards them following a suppression versus a reappraisal request. We found that regardless of followers’ gender, leaders’ attitudes were more positive when perceived follower anger was low

Alternatives aux intrants chimiques en culture bananière

Les producteurs de banane antillais sont engagés en partenariat avec l'Institut Technique Tropical et le CIRAD dans une démarche de réduction de l'emploi des intrants chimiques. Les innovations accompagnant cette démarche reposent principalement sur des techniques alternatives à la lutte chimique pour le contrôle des nématodes phyto-parasites et du charançon du bananier. Ces techniques font appel à l'intégration dans le système de culture de plantes de service afin de restaurer des mécanismes de régulation biologique des bio-agresseurs, à un contrôle de l'assainissement des parcelles par des tests biologiques, à l'utilisation de matériel végétal sain (vitroplants) pour la replantation des bananeraies et à la mise en place de pièges attractifs à phéromones pour la capture du charançon du bananier. Ces techniques sont intégrés dans des prototypes de systèmes de culture mis au point et testés en milieu réel dans le cadre d'une démarche de conception et d'évaluation participative impliquant les producteurs, les services techniques et la recherche. (Résumé d'auteur

Dipolar and scalar 3^3He and 129^{129}Xe frequency shifts in mm-sized cells

We describe a $^{3}$He-$^{129}$Xe comagnetometer operating in stemless anodically bonded cells with a 6 mm$^3$ volume and a $^{129}$Xe spin coherence time of 300 sec. We use a $^{87}$Rb pulse-train magnetometer with co-linear pump and probe beams to study the nuclear spin frequency shifts caused by spin polarization of $^{3}$He. By systematically varying the cell geometry in a batch cell fabrication process we can separately measure the cell shape dependent and independent frequency shifts. We find that a certain aspect ratio of the cylindrical cell can cancel the effects of $^3$He magnetization that limit the stability of vapor-cell comagnetometers. Using this control we also observe for the first time a scalar $^{3}$He-$^{129}$Xe collisional frequency shift characterized by an enhancement factor $\kappa_{\text{HeXe}} = -0.011\pm0.001$.Comment: 4 pages, 4 figure

Organizational attractiveness: a scale adaptation study

Bu çalışmanın amacı, Highhouse vd. (2003) tarafından geliştirilen Örgütsel Çekicilik Ölçeğini (ÖÇÖ) Türkçe’ye kazandırmak ve geçerlik ve güvenirlik analizlerini yapmaktır. Ölçek, öncelikle araştırmacılar ve bir dil uzmanı tarafından Türkçe’ye çevrilmiş, ardından ifadeler iki dilli 15 uzmanın görüşüne başvurularak dil ve anlam uygunluğu bakımından değerlendirilmiştir. Öneriler doğrultusunda son şeklini alan Türkçe form iki aşamada uygulanmıştır. İlk aşamada, test-tekrar test güvenirliğini sınamak amacıyla ölçek iki hafta ara ile 50 öğrenciye uygulanmıştır. Test tekrar-test güvenirlik katsayısı birincil değerlendirme için 0,85, ikincil değerlendirme için 0,89 olarak bulunmuştur. Uygulamanın ikinci aşamasında anket 257 öğrenciye uygulanarak ölçeğin iç tutarlılık katsayısı 0,89 olarak bulunmuştur. Yapılan analizler sonucunda ÖÇÖ’nün özgün ölçekte olduğu gibi üç faktörlü bir yapı gösterdiği belirlenmiştir. Hiçbir madde atılmadan 15 madde ile üç boyutu ölçen geçerli ve güvenilir bir ölçek elde edilmiştir.The purpose of the study is to investigate the validity and reliability of the organizational attractiveness scale which is developed by Highhouse et al. (2003) in Turkey. The 15 item scale was first translated into Turkish by researchers and one language expert, and then, translated sentences evaluated by 15 bilingual experts in terms of expression and linguistic suitability. In compliance with suggestions, the Turkish form was finalized and implemented in two stages. In the first stage, in order to analyze the reliability of test re-test, the scale was implemented with 50 students twice within two weeks and the reliability coefficient was found as 0,85 and 0,89 respectively. In the second stage, the scale was implemented with 257 students and the Cronbach Alpha was found as 0,89. As a result of the analysis, it was determined that Organizational Attractiveness Scale has a three dimensional structure as it is in the original form. Without excluding any items, a valid and reliable scale which consists of three dimensions and fifteen items were obtained

Energy deposited by neutrons and gamma rays in the cryogenic system of SISSI

International audienc