Accretion disc-corona and jet emission from the radio-loud narrow-line Seyfert 1 galaxy RX J1633.3+4719

We perform X-ray/ultraviolet (UV) spectral and X-ray variability studies of the radio-loud narrow-line Seyfert 1 (NLS1) galaxy RX J1633.3+4719 using XMM-Newton and Suzaku observations from 2011 and 2012. The 0.3-10 keV spectra consist of an ultrasoft component described by an accretion disc blackbody (kT_in = 39.6^{+11.2}_{-5.5} eV) and a power law due to the thermal Comptonization ({\Gamma} = 1.96^{+0.24}_{-0.31}) of the disc emission. The disc temperature inferred from the soft excess is at least a factor of 2 lower than that found for the canonical soft excess emission from radio-quiet NLS1s. The UV spectrum is described by a power law with photon index 3.05^{+0.56}_{-0.33}. The observed UV emission is too strong to arise from the accretion disc or the host galaxy, but can be attributed to a jet. The X-ray emission from RX J1633.3+4719 is variable with fractional variability amplitude $F_{\rm var}$=13.5$\pm1.0$ per cent. In contrast to radio-quiet active galactic nuclei (AGN), X-ray emission from the source becomes harder with increasing flux. The fractional rms variability increases with energy and the rms spectrum is well described by a constant disc component and a variable power-law continuum with the normalization and photon index being anticorrelated. Such spectral variability cannot be caused by variations in the absorption and must be intrinsic to the hot corona. Our finding of possible evidence for emission from the inner accretion disc, jet and hot corona from RX J1633.3+4719 in the optical to X-ray bands makes this object an ideal target to probe the disc-jet connection in AGN.Comment: 12 pages, 11 figures, 3 tables, Published in MNRA

Van der Waals induced polarization of molecules adsorbed on small metallic spheres : anisotropy and nonlocality effects

The calculation of Van der Waals induced polarization of molecules interacting with small metallic spheres is based on the spherical-tensor theory by using the response field susceptibility of the sphere. The first Euler angle appearing in the expression giving this polarization exhibits the anisotropy of the molecule. In order to illustrate the non locality and anisotropy effects as well as the importance of the metallic sphere curvature on the induced polarization magnitudes, we present numerical results for typical systems (HF, HCl) on (Ag, Al and Cu).The calculation of Van der Waals induced polarization of molecules interacting with small metallic spheres is based on the spherical-tensor theory by using the response field susceptibility of the sphere. The first Euler angle appearing in the expression giving this polarization exhibits the anisotropy of the molecule. In order to illustrate the non locality and anisotropy effects as well as the importance of the metallic sphere curvature on the induced polarization magnitudes, we present numerical results for typical systems (HF, HCl) on (Ag, Al and Cu)

Influence de la variation de la température de combustion dans un moteur Diesel sur les émissions de polluants (NOx et suies)

Le problème majeur du moteur Diesel est la pollution due aux émissions de gaz polluants tels que le monoxyde de carbone (CO), les hydrocarbures imbrûlés (HC), les particules (suies) et les oxydes d'azote (NOx). Ces polluants ont une influence néfaste sur la santé de l'homme et l’environnement. L’objectif de cette étude est d’évaluer l’influence de la variation de la température au niveau de la chambre de combustion du moteur Diesel sur les émissions des polluants NOx et suies. De ce fait, une investigation numérique a été effectuée par l’utilisation du code KIVA-3 –Lite. A un régime de 1400 tpm du moteur Diesel et à une forte charge, il a été constaté une influence de la variation de la température des  composants de la chambre de combustion sur les émissions des polluants (NOx et suies). A la température (T°) de 300 °K au niveau de la culasse, les concentrations du NOx et des suies étaient respectivement de 9,36 et 0,62 gr/kg-f et à la T° de 900°K au sein du même composant, les émissions de NOx ont diminué (3,05 gr/kg-f ) mais celles des suies étaient stables (0,75 gr/kg-f). Au niveau de la paroi du cylindre de la chambre de combustion et à une T° de 300 °K, les concentrations de NOx et suies étaient respectivement de 7,68 et 0,66 gr/kg-f par contre à la T° de 625 °K, les émissions de NOx et des suies étaient constantes (8,18 et 0,66 gr/kg-f). La performance du moteur Diesel, en cours, et les nouvelles réglementations ont réduit les émissions des polluants (NOx et suies).Mots clés : Moteur Diesel, pollution, émissions, suies, oxydes d’azote

Reponses Of A Metallic Bubble: A Self-Consistent Calculation Including Correlation And Exchange Effects

The Van der Waals energy of molecules interacting with metallic bubbles is determined from spherical-tensor theory by using the response field susceptibility of the spherical bubble. The correlation and exchange effects of the electron response inside the metal are included by using the local density approximation (LDA). The dependence of the Van der Waals energy on the first Euler angle is manifestation of the anisotropy of the interaction. In order to illustrate the non-locality and the correlation and exchange effects as well as the importance of the spherical bubble curvature and anisotropy of the interaction on the potential magnitudes, we present numerical results for typical systems (HF,HCl) molecules on (Ag,Al) surfaces.The Van der Waals energy of molecules interacting with metallic bubbles is determined from spherical-tensor theory by using the response field susceptibility of the spherical bubble. The correlation and exchange effects of the electron response inside the metal are included by using the local density approximation (LDA). The dependence of the Van der Waals energy on the first Euler angle is manifestation of the anisotropy of the interaction. In order to illustrate the non-locality and the correlation and exchange effects as well as the importance of the spherical bubble curvature and anisotropy of the interaction on the potential magnitudes, we present numerical results for typical systems (HF,HCl) molecules on (Ag,Al) surfaces

CONTRIBUTION A L’ÉTUDE HYDROLOGIQUE DANS LES MONTS DE SAIDA

If the evaluation of resources out of surface water is very useful with an aim of their planning, their installation, it is useful to know the hydrological reactions of the tank with respect to the conditions of food. It is one of the essential parameters in the overall estimate of the water resources. TheMounts of Saida, by their geographical location and his lithological constitution, plays a very important part in regional hydrology. It is in this mountainous solid mass that the karstic main sources of the zone occur; Ain Zerga, Ain Tifrit,Ain Soltane and Ain Balloul from which Tifrit wadi,wadi Sidi Mimoun and Saida wadi leave. The Flows of Different wadi and its affluents and the sources are defined starting from the statistical analysis of the chronicles of the daily medium flows. The common period of the observations of surface water 35 years east between September 1972 and August 2007

Early loss of primary teeth among children in Thamar city, Yemen

Objectives: The premature loss of primary teeth is a potential risk factor for poor arch length development. Adequate arch length is important to the progression of the permanent teeth. Poor arch length can lead to crowding, ectopic eruption, or impaction of these teeth. This study is designed to assess the prevalence of premature loss of primary teeth in the 5-10-year-old age group. Materials and Methods: The study group included 185 children, that is, 91 boys and 94 girls. The dental examination was conducted by an experienced examiner under sufficient artificial light. Data including patient age and missing teeth were collected. Descriptive statistics were applied for data analysis, and from the results, Chi-square tests were used at a level of significance of 5% (P < 0.05). Results: We observed a 40.54% prevalence of premature loss of primary teeth with no statistically significant difference between genders. The lower left primary second molar was the most commonly absent tooth in the dental arch (13.5%). Conclusion: The status of premature loss of primary teeth was high in the study group. Implementation of efficient educational and preventive programs to promote oral health would help children maintain a healthy primary dentition and eventually prevent the disturbances in the future development of normal occlusion. Early detection and management of the space problems associated with the early loss of primary teeth would help in reducing malocclusion problems

Imaging of lung transplant complications

AbstractSince the late 1980s, lung transplantation has emerged as a valid treatment option for some patients with advanced non-neoplastic lung disease. Long-term survival of lung transplant recipients, however, is lower than that of patients with other types of transplantation, because of numerous specific postoperative complications. Thanks to X-ray and CT, radiologists can guide clinicians, helped in this diagnostic approach by the time between the date of injury and date of transplantation. We will detail in this pictorial review the immediate and late surgical complications, the immunological complications, the infectious complications and other late complications

CONTRIBUTION A L’ÉTUDE HYDROLOGIQUE DANS LES MONTS DE SAIDA

If the evaluation of resources out of surface water is very useful with an aim of their planning, their installation, it is useful to know the hydrological reactions of the tank with respect to the conditions of food. It is one of the essential parameters in the overall estimate of the water resources. TheMounts of Saida, by their geographical location and his lithological constitution, plays a very important part in regional hydrology. It is in this mountainous solid mass that the karstic main sources of the zone occur; Ain Zerga, Ain Tifrit,Ain Soltane and Ain Balloul from which Tifrit wadi,wadi Sidi Mimoun and Saida wadi leave. The Flows of Different wadi and its affluents and the sources are defined starting from the statistical analysis of the chronicles of the daily medium flows. The common period of the observations of surface water 35 years east between September 1972 and August 2007

OCCLUSAL CHARACTERISTICS OF THE PRIMARY DENTITION AMONG A SAMPLE OF YEMENI PRE-SCHOOL CHILDREN

Objective: The occlusal features change dynamically in the growing children and any disruption in the complex craniofacial growth process may lead to malocclusion, which is a major concern for the pediatric community because of its effects on dental function and beauty, as well as on the child's psyche. The aim of the present study was to study the prevalence of different occlusal traits in the primary dentition of the randomly selected pre-school children from three to five years in the city of Sana’a, Yemen. Methods: The study includes 1106 pre-school children subjected to a dental examination performed in the school premise, using the Foster and Hamilton criteria for occlusal traits. As well as inter- and intra-calibration tests were conducted for assessing the degree of agreeability. Results: Results of the study showed that the Bilateral flush terminal molar relationship was found in 60%, bilateral mesial step in 27.9%, asymmetrical relationship in 8.5% and distal step in 3.5% of tested children. The Bilateral canine class I was detected in 62.8%, asymmetrical relationship (13.6%), class II (12.5%) and class III (11.1%). Normal over-jet (OJ) of 1-3 mm was identified in 39.2%, decreased OJ &lt;1 mm (32.7%) and edge-to-edge (8.8%). Ideal over-bite (OB) of 1-50% was detected in 64.5% and increased OB of &gt; 50% (19.7%). Conclusion: In conclusion theBilateral flush terminal molar, class I canine relationships, normal overjet (OJ) of 1-3mm were the most commonly found sagittal occlusal traits in the current study. Ideal over-bite (OB) of 1-50% were identified in more than half of the children. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Peer Review History: Received 2 February 2020; &nbsp;&nbsp;Revised 21 February; Accepted 3 March, Available online 15 March 2020 Academic Editor: Dr. DANIYAN Oluwatoyin Michael, Obafemi Awolowo University, ILE-IFE, Nigeria,&nbsp;[email protected] UJPR follows the most transparent and toughest ‘Advanced OPEN peer review’ system. The identity of the authors and, reviewers will be known to each other. This transparent process will help to eradicate any possible malicious/purposeful interference by any person (publishing staff, reviewer, editor, author, etc) during peer review. As a result of this unique system, all reviewers will get their due recognition and respect, once their names are published in the papers. We expect that, by publishing peer review reports with published papers, will be helpful to many authors for drafting their article according to the specifications. Auhors will remove any error of their article and they will improve their article(s) according to the previous reports displayed with published article(s). The main purpose of it is ‘to improve the quality of a candidate manuscript’. Our reviewers check the ‘strength and weakness of a manuscript honestly’. There will increase in the perfection, and transparency. Received file:&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Reviewer's Comments: Average Peer review marks at initial stage: 5.5/10 Average Peer review marks at publication stage: 7.0/10 Reviewer(s) detail: Aya Mohammed Mohammed Essawy,&nbsp;MTI University- Mokattam, Egypt,&nbsp;[email protected] Dr. Nada Farrag,&nbsp;Misr International University, Egypt, [email protected] Similar Articles: COCCIDIAN INTESTINAL PARASITES AMONG CHILDREN IN AL-TORBAH CITY IN YEMEN: IN COUNTRY WITH HIGH INCIDENCE OF MALNUTRITION EVALUATION OF THE IMMUNE RESPONSE TO POLIO VACCINE IN MALNOURISHED CHILDREN IN SANA'A CITY PREVALENCE AND POTENTIAL RISK FACTORS OF HEPATITIS B VIRUS IN A SAMPLE OF CHILDREN IN TWO SELECTED AREAS IN YEME

Dynamique phytoécologique du Thuya de Berbérie face à l'incendie

Le thuya de Berbérie est une espèce endémique de l'Afrique du Nord. Longtemps considérée comme une essence forestière sans grand intérêt, les écologues et les forestiers insistent aujourd'hui sur la place éminente qu'elle joue dans la structuration des paysages végétaux du Maghreb, mais aussi sur sa valeur forestière et économique. Sa régression actuelle en Algérie est donc très inquiétante. Cet article se propose de mieux connaître cette essence en étudiant son comportement à travers différents paramètres dendrométriques