Multi Purpose Research Articles

Моделирование и анализ основных характеристик внутренней трековой системы многофункционального детектора частиц MPD методом Монте-Карло

Моделирование и анализ основных характеристик внутренней трековой системы многофункционального детектора частиц MPD методом Монте-Карло

Randomized clinical trial of four adhesion strategies: A 42 month study.

The adhesives clinical effectiveness has been extensively reported for noncarious cervical lesions (NCCLs). However, there is a lack of information about the adhesive systems strategies and their effect on NCCL restoration longevity. This study aims to evaluate a 42-month performance of four dentin adhesive systems used for the restorative treatment of NCCLs. NCCLs were randomly divided into four groups: (1) Scotchbond multi-purpose (MP); 2: Single bond plus (SB); 3: Scotchbond SE (SE); and 4: Easy bond (EB). NCCLs (125) were randomly distributed: (1) MP; (2) SB; (3) SE; and (4) EB and were restored with a nanofilled resin-composite, evaluated along 18-36-42 months. Kruskal-Wallis test: Comparison among the adhesive systems in each period. Friedman analysis: Comparison along the periods. Kaplan-Meier: Survival analysis. Baseline and 42-month retention (RET) rates (%) were 100/100 for MP; 100/94.74 for SB; 100/87.5 for SE; and 100/100 for EB. The cumulative failure percentage was 9.52% for MP, 9.52% SB, 15.8% SE, and 10% EB. Restorations survival was not dependent on the used adhesive type. Marginal adaptation (MA) was similar to each group, but EB presented noticeable marginal deterioration. Wear was noticed in the 3-step etch-and-rinse (MP) restorations evaluated after 42 months. For the EB, baseline and 18-month wear evaluation were statistically similar. After 36 and 42 months, wear was also similar for EB. Adhesive systems showed similar performance within most important adhesive bonding efficiency achievement parameters: RET, MA, interfacial staining, recurrent caries, and postoperative sensitivity evaluated during 42 months.

Six-month performance of restorations produced with the ethanol-wet-bonding technique: a randomized trial.

This double-blind randomized controlled clinical trial evaluated the effectiveness of dentin pretreatment with 100% ethanol (EWBT - ethanol wet bonding technique) and different adhesive protocols in noncarious cervical lesions (NCCL) after 6 months. Patients presenting at least one NCCL were included. NCCLs (n=148) were randomly assigned to 4 groups: NE (Non-EWBT + three-step etch-and-rinse (Scotchbond Multi Purpose, 3M ESPE [MP]), E (EWBT + MP); EB (EWBT + [Bond - third step of MP]), and EU (EWBT + universal adhesive (Single Bond Universal, 3M ESPE). Conventional acid-etching (Condac 37%, FGM) and nanohybrid resin composite (Z350, 3M ESPE) were used. Trained and calibrated examiners (Kappa = 0.61) evaluated the restorations at baseline (7 days) and 6-month recall using the USPHS modified criteria. Data were subjected to Chi square (α = 0.05). Differences in the success rate were found for the treatments (p = 0.003). EB presented the lowest success rate compared with the other groups (p < 0.02). No significant differences were detected among NE, E, and EU (p > 0.49). The survival rates were 97.23%, 97.30%, 78.95%, and 97.30% for NE, E, EB, and EU, respectively. Regarding postoperative sensitivity, a significant reduction was found for groups E (p = 0.027) and EU (p < 0.01) after 6 months. After 6 months, EWBT associated to the hydrophobic adhesive system had the highest failure rate.

Prediction of the particle production in pp collisions with the MPD detector at NICA collider

The proton-proton collisions have been extensively used as a baseline reference for nucleus-nucleus collisions. In this work, Monte Carlo simulations of inelastic head-on pp interactions at $\sqrt s = 6 - 25\,{\rm{GeV}}$ were performed to study the possibilities of the Multi–Purpose Detector (MPD) to register data from small systems at the energy range of NICA. For that purpose the Monte Carlo models EPOS 1.99 and UrQMD 3.4 were used as event generators to analyse the charge particle yield from pp collisions in the framework of MpdRoot. The production of protons, pions and kaons from pp collisions was studied through their mean multiplicity, rapidity spectra and particle ratios as function of the collision energy. The yield of Λ hyperons was also estimated by means of pure Monte Carlo and the reconstruction of the simulated data in MPD. The comparison with recent data from NA61/SHINE experiment is presented.

A descriptive survey to assess the knowledge of multi purpose health workers and problems encountered by them in the management of cold chain system for vaccines in universal immunization programme in selected Health Centres of NCR (U.P.)

A descriptive survey to assess the knowledge of Multi Purpose Health Workers and problems encountered by them in the management of cold chain system for vaccines in Universal Immunization Programme in selected Health centres of NCR (UP).Objectives:1)To assess the knowledge of MPHW in management of cold chain system for vaccines in Universal Immunization Programme.2)To find out problems encountered by MPHW in management of cold chain system for vaccine in Universal Immunization Programme.3) To determine the association between knowledge about management of cold chain system with selected demographic factors. The conceptual framework developed for the study was based on the “Ludwig Open System Model”. The research approach for the study was descriptive survey approach; the study design was descriptive design. Non-Probability Purposive sampling Technique was used to obtain an adequate size of sample. The sample consisted of 100 MPHW’s working in Loni and Bisrakh Health Centres. Findings showed that: Majority of MPHW’s had the average knowledge 55(55%), 42(42%) had good knowledge and 1(1%) had poor knowledge regarding maintenance of Cold Chain system. Major Problems encountered by the MPHW’s were 72(72%) faced electricity problem, 71(71%) lack of availability of thermometer in recording the temperature of ILR, and 67(67%) faced difficulties in transporting the vaccines. Chi square value computed between knowledge score and selected demographic factors showed that the association of knowledge score of the MPHW’s with the Work Experience and In-Service training was found to be statically significant at 0.05 level of significance. It can be inferred that the knowledge of MPHW’s were dependent on their Work Experience and In-Service training. The study also discussed the implications of findings in the field of nursing education, practice, administration, research and for the society. The study concluded that the MPHW’s were having average knowledge regarding maintenance of cold chain system.

A Continuous Development and Evaluation of Multi Purpose Robot Platform AERO via Competition

A Continuous Development and Evaluation of Multi Purpose Robot Platform AERO via Competition

Development of a gear drive designer software

The paper deals with the programming and introducing the function of a new program for designing gear drives. The main goal of the program is to provide the exact machine setting parameters for producing a given gear drive. The software is a multi purpose tool for fast industrial calculations and pre-analysis.

Role of Multi Purpose Health Workers in Maternal and Child Health Services at Chittoor District, Andhra Pradesh

Role of Multi Purpose Health Workers in Maternal and Child Health Services at Chittoor District, Andhra Pradesh

Prospects for the study of event-by-event fluctuations at MPD/NICA project

One of the main physics goals of the Multi Purpose Detector (MPD) is to investigate hot and dense baryonic matter in heavy ion collisions at NICA energies to search for the possible critical end point (CEP). Since the location of CEP is not clear the entire accessible region of the QCD phase diagram needs to be explored by scanning the full range of available beam energies. In case of CEP existence it can be observed by abnormal fluctuations of various quantities such as net-proton multiplicity. This task requires excellent particle identification (PID) capability over as large as possible phase space volume. The identification of charged hadrons is achieved at the momenta of 0:1 – 3 GeV/c. The results of hadron identification and preliminary possibility estimation of the study of event-by-event fluctuations at MPD will be presented.

BALANCE SCORECARD DALAM ANALISIS KINERJA KOPERASI (Studi Kasus pada Koperasi Unit Desa (KUD) Bayongbong Kabupaten Garut, Jawa Barat)

Village Unit Cooperative (KUD) Bayongbong Garut Regency, Wes Java, is a livestock cooperative whose business activities are multi purpose. The purpose of cooperatives is to improve the welfare of members in particular and society in general, in accordance with the interests and needs of its members. The purpose of this study is to measure the performance of cooperatives by using Balanced Scorecard and efforts to be done so that cooperatives can improve its performance. Balanced Scorecard is a rapid measurement and control management system, precise and comprehensive, consisting of four perspectives: financial, customer, internal business processes and learning and growth. The results showed that the non-financial perspective of internal business consisting of livestock food business, cooperation business with State Electricity Company (PLN), Convenience Store, have a better perspective with score score 372, compared with other perspective that is customer perspective with value 832 and growth learning perspective with score 492. Suggestions that can be submitted are independent KUD Bayongbong must be able to improve service for customers and employee satisfaction, provide adequate information system and provide learning or training for its employees

Modal Analysis of Multi Purpose Hydraulic Die Spotting Press

Multi purpose hydraulic die spotting presses can be used for both die spotting and mass production. Due to the reducing cycle time of hydraulic presses in mass manufacturing, dynamic analysis can be used to determine the oscillations caused by the structural design of the hydraulic press. Oscillations are generated during loading and unloading cycle of press operation and can affect product quality, energy consumption, product life of press etc. Resonance which is related to natural frequency and damping ratio, must be avoided in order to increase the quality of press. There must be a necessary interval between operation (cycle) frequency and the natural frequency of the hydraulic press. Thus, the resonance can be prevented. In this work, the natural frequencies of the 2000 tone multi purpose hydraulic die spotting press is firstly calculated by modal analysis by using finite element model (FEM) and secondly measured during operation.

Approximation in Quantum Quadrupole at Juergen Model for Nuclear Reactor Control Rod Blade Based on \ce {Th_xDUO2} Nano Materials

The functional of a multi purpose research nuclear reactor control rod blade nuclear reactor is stabilized and controlling devices for nuclear chain reactions, the existing of Cerenkov's radiation impact and thermal neutron flux in reactor chamber. This research was conducted in Large Hadron Collider (LHC) - Muon Hadron Division at CERN, Lyon - France under International Research between Canadian Deuterium Uranium (CANDU) - Nuclear Reactor and Betha Group Section for sub-particles for nanomaterial. Using Juergen Model with quantum states approaching and testing by Muon-Hadron Stirrer equipment had determined the \ce {Th_xDUO2} derivatives materials. This material shown the strength of thermal neutron flux absorbed about 2.56 × 10⁵ − 1.94 × 10⁶ Ci/mm, the value of Electrical Conductivity is 26.62 − 29.98 in 800° - 890° C temperature, however at 2.1 × 10⁵ Ci/mm thermal neutron flux condition is 29.44 − 37.88 in IAEA standard. At 450 tesla magnetic field and 2.1 × 10⁵ Ci/mm thermal neutron absorber, the crystalline structure reduction is 6.88% until 10.95% for 25 years period in 45.7 megawatts with \ce {UO2} more enrichment and \ce {Pu2O} also \ce {Th2O_y} nuclear fuel element matrix.

Effect of ethanol-dissolved rhodamine B marker on mechanical properties of non-simplified adhesives.

Rhodamine B (RB) is commonly used to evaluate dental polymers, including dental bonding systems (DBS). For reliability assessments, its effect should not only allow visualization of the dentin-polymer interface but also must not interfere with the bonding of the DBS to dentin as measured by the microtensile bond strength and hardness tests. Flat human dentin surfaces were prepared and randomly distributed (n = 10) into six groups: Adper Scotchbond Multi-Purpose (MP) or Clearfil SE Bond (SE) in concentrations of none/control, 0.02 or 0.1 mg/mL. These combinations were prepared through ethanol dissolution to improve their penetration into the dentin. All specimens were fabricated with Filtek Z250 (n = 10) and prepared for a microtensile bond test (μTBS) (0.5 mm/min) after 7 days and 6 months. The failure modes were determined using a stereomicroscope (×40). For the hardness test, flat human dentin blocks were prepared and treated as previously described (n = 6). The specimens were stored at 37 °C/48 h and were tested (Knoop indenter - 25 gF/10 s). Data were analyzed with two-way ANOVA and Tukey tests for multiple comparisons (α = 0.05). The effect of time was evaluated using the Student t-test. For 7-day μTBS, both the DBS and RB concentrations were significant factors (p < 0.01). After 6 months, only the RB concentration was significantly different. Adhesive failures were prevalent for all groups. Regarding hardness, the DBS differed only with the use of 0.10 mg/mL of RB. Ethanol-dissolved rhodamine B in concentrations of 0.02 and 0.10 mg/mL in non-simplified adhesives can affect the physical-mechanical properties of functional monomer-based systems rather more than those of BisGMA systems.

Design Of Dry Cask Storage For Serpong Multipurpose Reactor Spent Nuclear Fuel

DESIGN OF DRY CASK STORAGE FOR SERPONG MULTI PURPOSE REACTOR SPENT NUCLEAR FUEL. The spent nuclear fuel (SNF) from Serpong Multipurpose Reactor, after 100 days storing in the reactor pond, is transferred to water pool interim storage for spent fuel (ISFSF). At present there are a remaining of 245 elements of SNF on the ISSF,198 element of which have been re-exported to the USA. The dry-cask storage allows the SNF, which has already been cooled in the ISSF, to lower its radiation exposure and heat decayat a very low level. Design of the dry cask storage for SNF has been done. Dual purpose of unventilated vertical dry cask was selected among other choices of metal cask, horizontal concrete modules, and modular vaults by taking into account of technical and economical advantages. The designed structure of cask consists of SNF rack canister, inner steel liner, concrete shielding of cask, and outer steel liner. To avoid bimetallic corrosion, the construction material for canister and inner steel liner follows the same material construction of fuel cladding, i.e. the alloy of AlMg2. The construction material of outer steel liner is copper to facilitate the heat transfer from the cask to the atmosphere. The total decay heat is transferred from SNF elements bundle to the atmosphere by a serial of heat transfer resistance for canister wall, inner steel liner, concrete shielding, and outer steel liner respectedly. The rack canister optimum capacity of 34 fuel elements was designed by geometric similarity method basedon SNF position arrangement of 7 x 6 triangular pitch array of fuel elements for prohibiting criticality by spontaneous neutron. The SNF elements are stored vertically on the rack canister. The thickness of concrete wall shielding was calculated by trial and error to give air temperature of 30 oC and radiation dose on the wall surface of outer liner of 200 mrem/h. The SNF elements bundles originate from the existing racks of wet storage, i.e. rack canister no 3, 8 and 10. The value of I0 from the rack no 3, 8 and 10 are 434.307; 446.344; and 442.375 mrem/h respectively. The total heat decay from rack canister no 3,8 and 10 are 179.640 ; 335.2; and 298.551 watts. The result of the trial and error calculation indicates that the rack canister no 3, 8 and 10 need the thickness of concrete shielding of 0.1912, 0.1954 and 0.1940 m respectively.Keywords: heat and radiation decay, spent fuel , storage cask.

Circulation of Fungi of the Genus Candida in Children's and Adult Multi Purpose Hospitals

The aimof the work is to study the circulation of fungi of the genus Candida in children's and adult multi purpose hospitals.Materials and methods.A total of 61,226 studies of material obtained from patients in the children's hospital were performed. A positive result was registered in 27 060 cases (44.2%). In an adult hospital, 8647 samples were tested, of which 1988 (23.0%) were positive.Results and discussion.Among the representatives of the fungi of the genus Candida, C. albicans 752 strains (61.3%) were isolated in the overwhelming number of patients of the children's hospital, C. papapsilosis – 15.1%, C. famata – 11.6%, and C. glabrata – 8.0%. Other representatives of the genus were rare enough, in particular: C. krusei and C. gullermondii – 1.1%, respectively. The greatest number of fungi of the genus – was allocated from patients in the Department of Resuscitation and Intensive Care – 467 strains (38.1% of all the fungi isolated), 186 strains (15.2%) in the Otorhinolaryngological department, 87 out of 87 (7.1%), in the Departments of Planned Surgery and Urology – 86 (7.0%), Surgical Intensive Care Unit – 72 (5.9%), in The Department of Infectious Diseases with Surgical Pathology – 65 (5.3%). C. albicans was sown both in monoculture – 47.4%, and in associations – 52.6%. Other representatives of fungi were also approximately equally found in mono- and in microcultures. In the children's multi purpose hospital, 11 species of Candida fungi with a predominance of C. albicans circulated. In the adult multi purpose hospital for two years was isolated from the patients 137 cultures of Candida fungi.Conclusions.The probability of isolating fungi from a locus is determined by the profile of the Department, as well as by the primary pathology with which patients entered the hospital. In both children's and adult hospitals, the most common Candida fungi have been isolated from the Department of Resuscitation and Intensive Care patients mainly from sputum and urine, less often from blood, separated wounds, abdominal cavity and from cerebrospinal fluid (only in children). Against the background of a wide circulation of fungi in the hospital, colonization of patients is possible with the subsequent development of the infectious process, mainly in people at risk.

Neutron Radiation Damage Estimation in the Core Structure Base Metal of RSG GAS

Radiation damage in core structure of the Indonesian RGS GAS multi purpose reactor resulting from the reaction of fast and thermal neutrons with core material structure was investigated for the first time after almost 30 years in operation. The aim is to analyze the degradation level of the critical components of the RSG GAS reactor so that the remaining life of its component can be estimated. Evaluation results of critical components remaining life will be used as data ccompleteness for submission of reactor operating permit extension. Material damage analysis due to neutron radiation is performed for the core structure components made of AlMg3 material and bolts reinforcement of core structure made of SUS304. Material damage evaluation was done on Al and Fe as base metal of AlMg3 and SUS304, respectively. Neutron fluences are evaluated based on the assumption that neutron flux calculations of U3Si8-Al equilibrium core which is operated on power rated of 15 MW. Calculation result using SRAC2006 code of CITATION module shows the maximum total neutron flux and flux >0.1 MeV are 2.537E+14 n/cm2/s and 3.376E+13 n/cm2/s, respectively. It was located at CIP core center close to the fuel element. After operating up to the end of #89 core formation, the total neutron fluence and fluence >0.1 MeV were achieved 9.063E+22 and 1.269E+22 n/cm2, respectively. Those are related to material damage of Al and Fe as much as 17.91 and 10.06 dpa, respectively. Referring to the life time of Al-1100 material irradiated in the neutron field with thermal flux/total flux=1.7 which capable of accepting material damage up to 250 dpa, it was concluded that RSG GAS reactor core structure underwent 7.16% of its operating life span. It means that core structure of RSG GAS reactor is still capable to receive the total neutron fluence of 9.637E+22 n/cm2 or fluence >0.1 MeV of 5.672E+22 n/cm2.

Projective geometry for the NICA/MPD Electromagnetic Calorimeter

A Multi Purpose Detector (MPD) is being constructed for the Heavy-Ion Collider at Dubna (NICA). One of the important components of MPD setup is an Electromagnetic Calorimeter, which will operate in the magnetic field of MPD solenoid 0.5 T and provide good energy and space resolution to detect particles in the energy range from ∼20 MeV to few GeV . For this purpose the, so-called, “shashlyk” sampling structure with the fiber readout to the silicon Multi Pixel Avalanche Photodetector is used. Serious modifications in comparison to conventional “shaslyk” calorimeter are proposed to improve the properties of device. These modifications are presented in the report along with the beam test results obtained with the MPD/NICA module prototypes.

Structure and Conformational Dynamics of the Splicing Factor hnRNP H

Members of the heterogeneous nuclear ribonucleoprotein (hnRNP) H/F family are multi purpose RNA binding proteins that participate in most stages of RNA metabolism. Despite having similar RNA sequence preferences, hnRNP H/F proteins function in overlapping but distinct cellular processes. The domain organization of hnRNP H/F proteins is modular consisting of N-terminal tandem quasi-RNA Recognition Motifs (H/FqRRM12) and a third C-terminal qRRM3 embedded within glycine-rich repeats. The tandem qRRMs are connected through a 10-residue linker with most of the amino acids strictly conserved between hnRNP H and F. A significant difference occurs at position 99 of the linker where hnRNP H contains a proline and hnRNP F an alanine. To investigate the influence of P99 on the conformational properties of hnRNP H, we probed the structural dynamics of its HqRRM12 domain with x-ray crystallography, NMR spectroscopy, and Small Angle X-ray Scattering (SAXS). We observed in the HqRRM12 contains multiple structures in solution by SAXS. These exchangeable conformations that located on the linker region and RNA recognition sites reach certain equilibrium in different temperature by NMR relaxation dispersion. The collective results best describe that HqRRM12 exists in a conformational equilibrium between compact and extended structures. The compact structure displays an electropositive surface formed at the qRRM1-qRRM2 interface; the surface is abrogated within the extended structure. Comparison of NMR relaxation parameters between HqRRM12 and FqRRM12 indicate that FqRRM12 primarily adopts an extended conformation. Introducing the P99A mutation into HqRRM12 alters its conformational dynamics to favor the more extended structure. Thus, our work demonstrates that the linker compositions confer different structural properties between hnRNP H/F family members that might contribute to their functional diversity.

How proteolytic inhibitors interact with dentin on glass-fiber post luting over 6 months

Enzyme inhibitors minimize the degradation of unprotected collagen of dentin promoted by matrix metalloproteinases (MMPs) and cysteine cathepsins (CCs). As the evidence of their effect on the root canal is limited, this study aimed to evaluate the role of EDTA, chlorhexidine and E-64 as antiproteolytic agents on the bond strength (BS) of glass-fiber posts in root canals. Ninety-six bovine roots were distributed in groups for each time point (n = 8). Adper Scotchbond Multipurpose (MP)/ RelyX ARC system was used to lute the post according to the treatment: negative control (NC)- water, EDTA- 17% ethylenediaminetetraacetic acid, CHX- 2% digluconate chlorhexidine, E-64-5- 5μM E-64, E-64-10- 10μM E-64 and positive control (PC)- MP associated with activator/ catalyst. Then, slices were subjected to push-out test (0.5mm/min) after 24h/6 mons. Data were analyzed by three-way ANOVA/Tukey tests. Failure modes were analyzed (40×). The factors treatment, time, root canal third and the interaction between treatment and time were statistically significant. At 24h, no negative interactions were observed among the root dentin, bonding system and post. At 6 mons, CHX improved the BS for middle and apical root thirds. CHX was able to promote beneficial BS after 6 mons, which was not noted for any other tested enzyme inhibitors.

Percutaneous retrieval of a shard of metal from the right ventricular apex after an industrial accident

A 29-year-old man suffered from an industrial accident as a piece of metal of a die-cutter burst and shards of metal penetrated his right upper arm. One shard was localized via x-ray and computer tomography within the apex of the right ventricle. Here we report on a successful retrieval of this shard of metal by aspirating it via a 6F multipurpose (MP) catheter.