大阪堆積盆地で見られる地震波速度から推測した浅層地盤中のガス飽和分布特性

博士(理学)大阪市立大

New Non-deterministic Approaches for Register Allocation

In this paper two algorithms for register allocation are presented. The first algorithm is a simulated annealing algorithm. The core of the algorithm is the Metropolis procedure. The algorithm presented in the paper has a linear time asymptotic complexity. The second algorithm is a genetic algorithm. The algorithm has a linear time complexity

Kinematic Analysis of the Musculoskeletal System Diabetic Type I

This study aimed to apply the principles of biomechanics science correctly, also to be is nested in the treatment of diabetics, and establish kinematic record for musculoskeletal diabetics. In order to improve the quality of life and care for diabetics. To achieve this, the researchers used the kinematic analysis of the musculoskeletal system for (8) mail patients with type1 diabetes, purposive selected and belonging to Jordanian team of Diabetes (age: 21±0.7years, height: 164± 4 cm, mas:58± 0.2 kg, the experience of the disease, 13.3±0.8 years). The study sample was filmed by using video camera (Sony HDR-CX220E) reached speed (50) frame/s. The study results showed that musculoskeletal system for Diabetic Type I differences in their shape of musculoskeletal the rest of the population, consequently people with Type 1 Diabetes have a swayback posture and a lower chest forward posture. and the average of sample study in the flexion spine(77)° and (15)°for extension spine. Where it formed 81% from natural flexion spine and 45% from natural extension spine. The researchers recommend: the necessity informed Diabetic Type I on kinematic analysis of the musculoskeletal system

A Simulation Model for Hierarchical Routing Protocols in Wireless Sensor Networks

One of the critical issues in wireless sensor network is power saving scheme as network should be considered to operate more efficiently. The sensor nodes are usually operated by a finite number of batteries and it should have a certain lifetime for gathering, processing, and transmitting information. Since some sensor nodes may fail due to lack of power, this consideration has led to give more interest about routing protocols. Depending on the network structure, a sensor network can be hierarchical or cluster-based hierarchical model, where the nodes will play different roles in the networks. We present three different types of routing protocols: LEACH, PEGASIS, and VGA, several simulations are conducted to analyze the performance of these protocols including the power consumption and overall network performance. On the average, VGA has the worst power consumption when the sensing range is limited, while VGA is the best when the sensing range is increased

Etude minéralogique et chimique du phosphate naturel d’Oum El Khecheb (Gafsa, Tunisie)

Abandonné dans les années quatre-vingt du 20ème siècle, le gisement d’Oum El Khecheb, ancienne mine du champ de Métlaoui, fut «redécouvert» de nouveau et programmé pour l’exploitation, toujours par la Compagnie des Phosphates de Gafsa. C’est l’exploration souterraine de ce gisement qui a orienté vers cette initiative d’éventuelle future exploitation d’une zone facile à entreprendre. En prenant pour objet d’étude la série phosphatée du gisement d’Oum El Khecheb, nous avons cherché à identifier les différences et les similitudes de nature pétrographique, minéralogique ou géochimique existant entre les différentes couches et fractions.L’étude minéralogique a sélectionné les couches CII, CV, CVI et CVIII comme étant lesplus minéralisées et potentiellement les plus rentables. Les différentes analyses effectuées sur le phosphate de cette tranchée ont montré que ce dernier présente un intérêt économique important en raison de sa forte teneur en P2O5 jusqu’à 29% dans certaines couches et un rendement chimique qui atteint 90 %, malgré les concentrations relativement élevées en MgO et Cd. La fraction marchande est composée de particules comprises entre 71 et 2000 µm ; la fluorpatite et la francolite y sont souvent accompagnées de carbonates, de certains silicates et de gypse. Pour les argiles, seule la palygorskite a été mise en évidence par DRX dans la fraction fine (< 71 µm). Mots-clés: phosphate, traitement, DRX, Spectroscopies infrarouges, ATD et ATG

Traitement et valorisation des rejets de phosphates de Gafsa Treatment and Valorization of Waste Gafsa pohosphate

Abstract- Phosphogypsum is a by-product of the fertilizer industry obtained during the attack natural calcium phosphates with sulfuric acid. Storage and management of this toxic and annoying waste are a problem that affects many countries producing phosphate fertilizer, especially since discards are, in principle, prohibited by international law. Therefore, phosphogypsum is a major preoccupation in the research of a solution for its recovering or its removal. In this work, we were interested in characterizing two phosphogypsum located in Gafsa basin, in the south-west of Tunisia. Two samples from two different deposits (silica phosphogypsum of M'dhilla and phosphogypsum of Om Lackcheb) were treated with different products and solvents in order to explore the possibility of recovery. Before and after treatment, they were characterized by X-ray diffraction, chemical analysis, scanning electron microscopy and infrared spectroscopy.Résumé- Le phosphogypse est un sous-produit de l'industrie des engrais obtenu lors de l'attaque des phosphates de calcium naturels par l'acide sulfurique. Le stockage et la gestion de ce déchet toxique et gênant sont un problème qui concerne beaucoup de pays producteurs d’engrais phosphatés surtout que les rejets en mer sont en principe interdits par la législation internationale. De ce fait, les phosphogypses constituent une préoccupation majeure dans la recherche en vue de leur valorisation ou de leur élimination. Dans ce travail, nous nous sommes intéressés à caractériser deux phosphogypses du bassin de Gafsa situé dans le sud-ouest de la Tunisie. Deux échantillons provenant de deux gisements différents (phosphogypse siliceux de M’dhilla et phosphogypse d’Om Lackcheb) ont été traités par différents produits et solvants afin d'étudier la possibilité de leur valorisation. Avant et après leur traitement, ils ont été caractérisés par diffraction des rayons X, analyses chimiques, microscopie électronique à balayage et spectroscopie infrarouge.

Effect of Cryotherapy on the Occurrence of Stomatitis Induced by Chemotherapy among Children with Bone Tumors in Egypt

Stomatitis has been shown to occur closer to fourty percent in solid tumor children receiving chemotherapy. Cryotherapy is an alternative method of preventing stomatitis associated with chemotherapeutic drugs. This study aimed to evaluate the effect of oral cryotherapy on the occurrence of stomatitis induced by chemotherapy among children with bone tumors. A quasi-experimental design was utilized on a convenient sample of 60 children with bone tumors, thirty of them followed the hospital routine care (control group) and other thirty sucked ice cubes (study group) before inducing chemotherapy session for five minutes to half an hour during session and thirty five minutes after session. Both groups were treated with the following chemotherapy drugs: Adriamycin and Methotrexate. This study was conducted at the National Cancer Institute (NCI), Cairo, Egypt. Oral assessment guide (OAG) was used prior, 3rd, 4th and 5th days post intravenous chemotherapy administration during induction phase. Results revealed that no significant difference was detected in the mean total scores of both group prior to chemotherapy administration while it decreased significantly at the third, fourth and fifth days post chemotherapy for children who received oral cryotherapy than do not received. Children who received oral ice cubes had healthier oral cavity than who did not receive. It was concluded that oral cryotherapy reduces the severity of stomatitis induced by chemotherapy. Oral cryotherapy must be involved in the routine care for a child who receiving chemotherapy was recommended. Keywords: Oral Cryotherapy, Stomatitis, Chemotherapy, Bone Tumors, Childre

EFFECT OF GRINDING AND PARTICLE SIZE ON SOME PHYSICAL AND RHEOLOGICAL PROPERTIES OF CHITOSAN

The present study was conducted to prepare nano-chitosan particles (CN) by ultrafine grinding  from crude chitosan powder (CC) using a ball mill with 130 numbers of zirconia beads in range from 0.5 to 1.5 mm diameter (75 beads 0.5 mm diameter, 30 beads 1.0 mm diameter and 25 beads 1.5 mm diameter). In addition, physical and rheological properties of chitosan solutions were determined. The results revealed that ultrafine grinding has effectively milled the chitosan particles to nanoscale. Prepared chitosan nanoparticles were characterized by  devices  X-Ray Diffraction (XRD), Zetasizer particle sizes and Zeta potential of chitosan particles (after milling for 30, 60 and 90 minutes). The particle size of nano-chitosan was distributed in a range of 250-600 nm. with a polydispersity index use as an anti-oxidant and antimicrobial with reducing the amount used to deliver the desired purpose. Additional research is required to further investigate the potential value-added utilization of these chitosan derivatives in improving the quality and safety of some food products

DIVERSITY OF BACILLUS GENOTYPES IN SOIL SAMPLES FROM EL-OMAYED BIOSPHERE RESERVE IN EGYPT

Sequencing of the 16S rDNA hypervariant region was applied to determine the presence and composition of Bacillus species in 40 soil samples randomly collected from different habitats in El-Omayed biosphere reserve, Egypt. Although purified cultures showed 18 different phenotypes that were morphologically distinct on a sporulation medium plate, only 4 different nucleotide sequences designated Seq A, B, C and D were revealed. Computational analysis of DNA sequence data suggested that 17 of these isolates are closely related members of the Bacillus cereus/thuringiensis group (Seq B, C and D) and one isolate is belonging to the Bacillus subtilis group (Seq A). Further phenotypic investigations confirmed the diversity of the 17 novel Bacillus cereus/thuringiensis isolates and indicated that the new Bacillus subtilis group isolate is a Bacillus amyloliquefaciens strain. A simple phenotypic discrimination key that can be applied for distinguishing between such closely related Bacillus cereus/thuringiensis members is presented

Laparoscopy in management of appendicitis in high-, middle-, and low-income countries: a multicenter, prospective, cohort study.

BACKGROUND: Appendicitis is the most common abdominal surgical emergency worldwide. Differences between high- and low-income settings in the availability of laparoscopic appendectomy, alternative management choices, and outcomes are poorly described. The aim was to identify variation in surgical management and outcomes of appendicitis within low-, middle-, and high-Human Development Index (HDI) countries worldwide. METHODS: This is a multicenter, international prospective cohort study. Consecutive sampling of patients undergoing emergency appendectomy over 6 months was conducted. Follow-up lasted 30 days. RESULTS: 4546 patients from 52 countries underwent appendectomy (2499 high-, 1540 middle-, and 507 low-HDI groups). Surgical site infection (SSI) rates were higher in low-HDI (OR 2.57, 95% CI 1.33-4.99, p = 0.005) but not middle-HDI countries (OR 1.38, 95% CI 0.76-2.52, p = 0.291), compared with high-HDI countries after adjustment. A laparoscopic approach was common in high-HDI countries (1693/2499, 67.7%), but infrequent in low-HDI (41/507, 8.1%) and middle-HDI (132/1540, 8.6%) groups. After accounting for case-mix, laparoscopy was still associated with fewer overall complications (OR 0.55, 95% CI 0.42-0.71, p < 0.001) and SSIs (OR 0.22, 95% CI 0.14-0.33, p < 0.001). In propensity-score matched groups within low-/middle-HDI countries, laparoscopy was still associated with fewer overall complications (OR 0.23 95% CI 0.11-0.44) and SSI (OR 0.21 95% CI 0.09-0.45). CONCLUSION: A laparoscopic approach is associated with better outcomes and availability appears to differ by country HDI. Despite the profound clinical, operational, and financial barriers to its widespread introduction, laparoscopy could significantly improve outcomes for patients in low-resource environments. TRIAL REGISTRATION: NCT02179112