Measurement of the Current-Phase Relation in Josephson Junctions Rhombi Chains

We present low temperature transport measurements in one dimensional Josephson junctions rhombi chains. We have measured the current phase relation of a chain of 8 rhombi. The junctions are either in the classical phase regime with the Josephson energy much larger than the charging energy, $E_{J}\gg E_{C}$, or in the quantum phase regime where $E_{J}/E_{C}\approx 2$. In the strong Josephson coupling regime ($E_{J}\gg E_{C} \gg k_{B}T$) we observe a sawtooth-like supercurrent as a function of the phase difference over the chain. The period of the supercurrent oscillations changes abruptly from one flux quantum $\Phi_{0}$ to half the flux quantum $\Phi_{0}/2$ as the rhombi are tuned in the vicinity of full frustration. The main observed features can be understood from the complex energy ground state of the chain. For $E_{J}/E_{C}\approx 2$ we do observe a dramatic suppression and rounding of the switching current dependence which we found to be consistent with the model developed by Matveev et al.(Phys. Rev. Lett. {\bf 89}, 096802(2002)) for long Josephson junctions chains.Comment: to appear in Phys. Rev.

Knowledge, Attitude and Barriers towards Children Immunization among Women in Selected Rural Primary Health Centres

This study explored the knowledge, attitude and barriers to children immunization among women in four selected Rural Primary Health Centres. Immunization coverage rates in Nigeria have remained very poor especially in rural communities despite a plethora of programs and strategies. A survey research questionnaire made up of three trajectories (Attitude, knowledge and barriers to childhood immunization) was used in this study (n= 79, mean= 33 +/-6.9years). This study made use of descriptive and inferential statistic. The SPSS software was used to analyze the data. The study indicates that about 80% of the respondents are aware that immunization services are available at primary healthcare centres, but less than half are aware that immunization against polio is meant for children who are 5 years and below. For barriers, about 53% reported they have no confidence in the quality and safety of vaccines being used while 62% reported that health workers are not sufficiently trained. For attitude, most agreed that immunization make children grow healthy (66%). In this study, knowledge of immunization was a better predictor of barriers to immunization (β = 0.633; t = 2.108; p < 0.05). Mothers could be motivated to have their children immunized by doubling efforts at enlightening them and by reiterating the benefits of child immunization to pregnant women during ante-natal clinics. Good healthcare facilities and improve personnel services will encourage more uptakes of immunization services

Expression of schizophrenia in black Xhosa-speaking and white English-speaking South Africans

Objective. To inv:estigate whether schizophrenia manifests itself differently in  Xhosa-speaking South Africans, compared with English-speaking white South  Africans.Design. A comparative study ·of the presentation of schizophrenia in two groups of patients.Settings and subjects. A sample of 63 patients (43 Xhosaspeaking and 20 English-speaking) admitted to a large psychiatric hospital for the first time with a diagnosis of schizophrenia.Outcome measures. The Present State Examination (PSE) was used to confirm the clinical diagnosis of schizophrenia. The Relatives' Rating of Symptoms and Social Behaviour (KAS-R) was used to obtain information on the behavioural and emotional expression of schizophrenia.Results. A significantly higher prevalence of aggressive and disruptive behaviour was reported by relatives of Xhosaspeaking patients with schizophrenia of recent onset compared with English-speaking patients. The PSE elicited significantly more delusions of persecution, sexual and fantastic delusions, self-neglect and irritability in the Xhosaspeaking patients.Canclusion. Significant differences in the presentation of schizophrenia, but not its core symptoms, were identified in . Xhosa-speaking blacks and English-speaking whites

A systemic review of existing serological possibilities to diagnose canine osteoarthritis with a particular focus on extracellular matrix proteoglycans and protein

Extra-cellular matrix (ECM) components are important and their stabilization is significant in maintaining normal healthy joint environment. In osteoarthritis (OA), ECM components are altered and indicate disease progression. The joint ECM is composed of proteoglycans (aggrecan, perlecan, inter a-trypsin inhibitor), glycoproteins (fibronectin, lubricin, COMP) and collagen types (most abundantly collagen type II) which represent structural and functional transformation during disease advancement. ECM investigation revealed significant biomarkers of OA that could be used as a diagnostic and therapeutic tool in different canine orthopedic diseases. This review deliberates our current findings of how the components of ECM change at the molecular level during disease progression in canine OA

Interactions of asbestos-activated macrophages with an experimental fibrosarcoma

Supernatants from in vivo asbestos-activated macrophages failed to show any cytostatic activity against a syngeneic fibrosarcoma cell line in vitro. UICC chrysotile-induced peritoneal exudate cells also failed to demonstrate any growth inhibitory effect on the same cells in Winn assays of tumor growth. Mixing UICC crocidolite with inoculated tumor cells resulted in a dose-dependent inhibition of tumor growth; this could, however, be explained by a direct cytostatic effect on the tumor cells of high doses of crocidolite, which was observed in vitro

Photon emission by an ultra-relativistic particle channeling in a periodically bent crystal

This paper is devoted to a detailed analysis of the new type of the undulator radiation generated by an ultra-relativistic charged particle channeling along a crystal plane, which is periodically bent by a transverse acoustic wave, as well as to the conditions limiting the observation of this phenomenon. This mechanism makes feasible the generation of electromagnetic radiation, both spontaneous and stimulated, emitted in a wide range of the photon energies, from X- up to gamma-rays

Study of Charmonia near the deconfining transition on an anisotropic lattice with O(a) improved quark action

We study hadron properties near the deconfining transition in the quenched lattice QCD simulation. This paper focuses on the heavy quarkonium states, such as $J/\psi$ meson. In order to treat heavy quarks at $T>0$, we adopt the $O(a)$ improved Wilson action on anisotropic lattice. We discuss $c\bar{c}$ bound state observing the wave function and compare the meson correlators at above and below $T_c$. Although we find a large change of correlator near the $T_c$, the strong spatial correlation which is almost the same as confinement phase survives even $T\sim 1.5T_c$.Comment: 19 pages, 10 figure

Экспериментальное исследование характеристик цифрового фотоплетизмографического сенсора

Описано новий, високочутливий оптичний сенсор, на основі світлодїодів, з яких один виконує функцію джерела світла, а другий зворотно-зміщений функціонує як світло- приймач. Показана можливість використання даного принципу вимірювання для задач отримання пульсової хвиліDesign of. the new, high-sensitivity optica! sensor, on the basis of the light-emitting diodes is presented, one with which carries out function of a light source, and another back displaced functions as the detector. Availability this principle of measuring for problems of recording pulse waves is shownОписан новый, высокочувствительный оптический сенсор, на основе светодиодов, один из которых выполняет функцию источника излучения, а другой функционирует как детектор. Показана возможность использования данного принципа измерения для задач регистрации пульсовой волн