A new job migration algorithm to improve data center efficiency

The under exploitation of the available resources risks to be one of the main problems for a computing center. The growing demand of computational power necessarily entails more complex approaches in the management of the computing resources, with particular attention to the batch queue system scheduler. In a heterogeneous batch queue system, available for both serial single core processes and parallel multi core jobs, it may happen that one or more computational nodes composing the cluster are not fully occupied, running a number of jobs lower than their actual capability. A typical case is represented by more single core jobs running each one over a different multi core server, while more parallel jobs - requiring all the available cores of a host - are queued. A job rearrangement executed at runtime is able to free extra resources, in order to host new processes. We present an efficient method to improve the computing resources exploitation.Comment: 7 page

La lingua del diritto penale

Dopo una premessa sul linguaggio del diritto penale, inteso come metodo di comunicazione che si avvale di segni non verbali, il lavoro esamina la lingua in senso stretto del diritto penale, delineandone le caratteristiche principali e analizzandone successivamente i vizi e le patologie. Il nucleo centrale dell’elaborato è dedicato quindi all’esame delle conseguenze di tali patologie linguistiche, al fine di dimostrare che esse pregiudicano i principi fondamentali del diritto penale: dal principio di democraticità al principio di effettività, passando per i principi che presiedono allo svolgimento dell’attività legislativa e che regolano il giusto processo. Seguono infine riflessioni più costruttive, volte a individuare le caratteristiche ideali di una lingua coerente con i principi e con le funzioni del diritto penale: si cerca di tracciare la strada da percorrere per ottenere una lingua più giusta, capace di rinnovare la fiducia nella legge e nella Giustizia, costruendo un diritto penale effettivamente democratico

Polarization of Migrating Monocytic Cells Is Independent of PI 3-Kinase Activity

BACKGROUND: Migration of mammalian cells is a complex cell type and environment specific process. Migrating hematopoietic cells assume a rapid amoeboid like movement when exposed to gradients of chemoattractants. The underlying signaling mechanisms remain controversial with respect to localization and distribution of chemotactic receptors within the plasma membrane and the role of PI 3-kinase activity in cell polarization. METHODOLOGY/PRINCIPAL FINDINGS: We present a novel model for the investigation of human leukocyte migration. Monocytic THP-1 cells transfected with the alpha(2A)-adrenoceptor (alpha(2A)AR) display comparable signal transduction responses, such as calcium mobilization, MAP-kinase activation and chemotaxis, to the noradrenaline homologue UK 14'304 as when stimulated with CCL2, which binds to the endogenous chemokine receptor CCR2. Time-lapse video microscopy reveals that chemotactic receptors remain evenly distributed over the plasma membrane and that their internalization is not required for migration. Measurements of intramolecular fluorescence resonance energy transfer (FRET) of alpha(2A)AR-YFP/CFP suggest a uniform activation of the receptors over the entire plasma membrane. Nevertheless, PI 3-kinase activation is confined to the leading edge. When reverting the gradient of chemoattractant by moving the dispensing micropipette, polarized monocytes--in contrast to neutrophils--rapidly flip their polarization axis by developing a new leading edge at the previous posterior side. Flipping of the polarization axis is accompanied by re-localization of PI-3-kinase activity to the new leading edge. However, reversal of the polarization axis occurs in the absence of PI 3-kinase activation. CONCLUSIONS/SIGNIFICANCE: Accumulation and internalization of chemotactic receptors at the leading edge is dispensable for cell migration. Furthermore, uniformly distributed receptors allow the cells to rapidly reorient and adapt to changes in the attractant cue. Polarized monocytes, which display typical amoeboid like motility, can rapidly develop a new leading edge facing the highest chemoattractant concentration at any site of the plasma membrane, including the uropod. The process appears to be independent of PI 3-kinase activity

Analysis of Social Interaction in Music Performance With Score-independent Audio Features

(Abstract to follow

Early cardiac abnormalities and increased C-reactive protein levels in a cohort of children with sleep disordered breathing

This study aims to evaluate left ventricular (LV) structure and function and inflammation in a paediatric population with sleep disordered breathing (SDB) and in control subjects. Forty-nine children with SDB and 21 healthy, age-matched subjects were enrolled. The diagnosis of obstructive sleep apnoea syndrome (OSAS) was confirmed by the laboratory polysomnography, showing an obstructive apnoea/hypopnoea index of more than one per hour, according to the criteria of the American Academy of Sleep Medicine and modified for paediatric population. Fasting blood samples for the biochemical evaluation (including high-sensitivity C-reactive protein (hsCRP) were drawn in the morning, after the polysomnographic examination in all patients with SDB and in the control group. All children underwent a two-dimensional colour Doppler cardiac examination with LV mass assessment and systolic and diastolic function evaluation. Higher hsCRP levels were observed in subjects with OSAS than in children with primary snoring and in controls (0.8 +/- 0.7 vs 0.3 +/- 0.1 ng/dl, p = 0.001, and 0.4 +/- 0.2 ng/dl, p = 0.01, respectively). The LV diastolic dysfunction was significantly more frequent in patients with severe OSAS and higher hsCRP levels than in control group. This study shows that OSAS in children is associated with higher LV mass, early LV diastolic dysfunction and a pro-inflammatory state (high CRP levels). These findings might help to explain the higher incidence of cardiovascular morbidity in patients with OSAS

Medication preparation and administration : analysis of inquiries and information by the nursing team

Este estudo analisou os questionamentos apresentados por técnicos e auxiliares de enfermagem aos enfermeiros durante o preparo e administração de medicamentos. Para coleta dos dados utilizou-se um formulário entregue aos enfermeiros de unidades de internação de um hospital geral do interior paulista, solicitando que anotassem as dúvidas dos profissionais da equipe que lhe fossem endereçadas. Foram registrados pelos enfermeiros 255 questionamentos sendo que a maioria destes estava relacionada à diluição do medicamento (103). Com relação às respostas dos enfermeiros às dúvidas, somente 7,5% destas foram obtidas através dos profissionais da farmácia. Ressalta-se que 35,5% das respostas emitidas pelos enfermeiros estavam incorretas ou parcialmente corretas podendo constituir fator para erros na administração de medicamentos. Somado a isto, inexistem farmacêuticos nas unidades de internação nos hospitais brasileiros, os quais poderiam, juntamente com o enfermeiro, facilitar a orientação dos profissionais de enfermagem quanto aos medicamentos, no momento do preparo e administração dos mesmos, bem como ao próprio paciente. ___________________________________________________________________________________________________ ABSTRACTThis study analyzed questions presented by nursing technicians and auxiliaries during medication preparation and administration. Data were collected through a form in which nurses who worked in the hospitalization unit of ageneral hospital in São Paulo, Brazil, were asked to take notes of any questions asked to them. Most of the 255 questions were related to medication dilution (103). Regarding the answers source, only 7.5% of answers were obtained from pharmaceutical professionals, 35.5% of the answers given by nurses was incorrect or partially correct, which can constitute a factor for medication administration errors. In addition, there are no pharmacists present in hospitalization units of Brazilian hospitals. These professionals could, jointly with nurses, facilitate medication orientation to nursing professionals during preparation and administration, as well as to patients themselves. ___________________________________________________________________________________________________ RESUMENEste estudio analizó las preguntas presentadas por técnicos y auxiliares de enfermería a los enfermeros durante la preparación y administración de medicamentos. Para recopilar los datos, se utilizó un formulario entregue a los enfermeros de unidades de internación de un hospital general del interior del Estado de São Paulo, Brasil, solicitando que anotaran las dudas que recibieran. La mayoría de las 255 preguntas estaba relacionada a la disolución del medicamento (103). Respecto a las respuestas, solamente el 7,5% de estas fue obtenido a través de los profesionales de la farmacia. Se destaca que el 35,5% de las respuestas emitidas por los enfermeros estaban incorrectas o parcialmente correctas, lo que puede constituir un factor para errores en la administración de medicamentos. Además, no existen farmacéuticos en las unidades de internación en los hospitales brasileños. Estos podrían, en conjunto con los enfermeros, facilitar la orientación de los profesionales de enfermería en cuanto a los medicamentos, en el momento de su preparación y administración, y también de los propios pacientes

Second Trimester Amniocentesis Is Not a Risk Factor for Very Low Birth Weight and Extremely Low Birth Weight

Objectives. To assess the risk of very low birth weight (VLBW) and extremely low birth weight (ELBW) attributable to second trimester amniocentesis. Methods. Records of 4,877 consecutive amniocentesis, performed between 1997 and 2003, were analyzed. Only VLBW and ELBW in the study population (exposed) and in the control group (unexposed) were evaluated. Comparisons were made between the amniocentesis group versus nonexposed. Odds ratios (OR) and 95% confidence intervals (95% CI) were calculated for VLBW and ELBW classes. Results. In the study population, the VLBW were 35 (0.71%) and the ELBW were 20 (0.41%). In the control group, the VLBW were 220 (0.67%) and the ELBW were 112 (0.34%). The Odds ratios of the VLBW between the study and the control group did not show any statistical significant risk (OR = 1.07, 95% CI = 0.72–1.54). Also in ELBW odds ratios between study and control group were not statistically significant (OR = 1.20, 95% CI = 0.7–1.95). Conclusions. No effect of the second trimester amniocentesis was noted on VLBW and ELBW

Luminal Ca2+ Regulation of Single Cardiac Ryanodine Receptors: Insights Provided by Calsequestrin and its Mutants

The luminal Ca2+ regulation of cardiac ryanodine receptor (RyR2) was explored at the single channel level. The luminal Ca2+ and Mg2+ sensitivity of single CSQ2-stripped and CSQ2-associated RyR2 channels was defined. Action of wild-type CSQ2 and of two mutant CSQ2s (R33Q and L167H) was also compared. Two luminal Ca2+ regulatory mechanism(s) were identified. One is a RyR2-resident mechanism that is CSQ2 independent and does not distinguish between luminal Ca2+ and Mg2+. This mechanism modulates the maximal efficacy of cytosolic Ca2+ activation. The second luminal Ca2+ regulatory mechanism is CSQ2 dependent and distinguishes between luminal Ca2+ and Mg2+. It does not depend on CSQ2 oligomerization or CSQ2 monomer Ca2+ binding affinity. The key Ca2+-sensitive step in this mechanism may be the Ca2+-dependent CSQ2 interaction with triadin. The CSQ2-dependent mechanism alters the cytosolic Ca2+ sensitivity of the channel. The R33Q CSQ2 mutant can participate in luminal RyR2 Ca2+ regulation but less effectively than wild-type (WT) CSQ2. CSQ2-L167H does not participate in luminal RyR2 Ca2+ regulation. The disparate actions of these two catecholaminergic polymorphic ventricular tachycardia (CPVT)–linked mutants implies that either alteration or elimination of CSQ2-dependent luminal RyR2 regulation can generate the CPVT phenotype. We propose that the RyR2-resident, CSQ2-independent luminal Ca2+ mechanism may assure that all channels respond robustly to large (>5 μM) local cytosolic Ca2+ stimuli, whereas the CSQ2-dependent mechanism may help close RyR2 channels after luminal Ca2+ falls below ∼0.5 mM

Gene Transfer of Engineered Calmodulin Alleviates Ventricular Arrhythmias in a Calsequestrin-Associated Mouse Model of Catecholaminergic Polymorphic Ventricular Tachycardia

Catecholaminergic polymorphic ventricular tachycardia (CPVT) is a familial arrhythmogenic syndrome characterized by sudden death. There are several genetic forms of CPVT associated with mutations in genes encoding the cardiac ryanodine receptor (RyR2) and its auxiliary proteins including calsequestrin (CASQ2) and calmodulin (CaM). It has been suggested that impairment of the ability of RyR2 to stay closed (ie, refractory) during diastole may be a common mechanism for these diseases. Here, we explore the possibility of engineering CaM variants that normalize abbreviated RyR2 refractoriness for subsequent viral-mediated delivery to alleviate arrhythmias in non-CaM-related CPVT