Trouble shooting the problems of Dry Gas Seals and Systems in Centrifugal Compressors

Case Stud

A cross sectional study of sociodemographic profile, disability and family burden in patients with obsessive compulsive disorder

Background: Obsessive compulsive disorder (OCD) is characterized by the presence of obsessions (intrusive and unwanted repetitive thoughts, urges, or impulses that often lead to a marked increase in anxiety or distress) and/ or compulsions (repeated behaviours or mental acts that are done in response to obsessions). OCD patients report general impairment in their functioning and family burden. They also suffer from disability in several areas of daily life.Methods: This study has a cross-sectional design, and author included total 200 consecutive selected OCD patients diagnosed according to International Classification of Disease (ICD)-10.Results: Most of respondent included in this study were married male (74%), belonged to Hindu religion and urban background (68%) with mean age of 33 year (SD=9.91), 88% subjects were found to be employed in this study, educated middle standard and above. In this study, maximum disability was noted in domains of work (mean score 1.10) and communication and understanding (mean score 0.70), the impairment in interpersonal activity was lesser (mean score 0.34). The domain in which the maximum burden was found among family members is disruption of routine/ family activities overall (52%).Conclusions: The study aimed at assessing the burden in families and disability in subjects having OCD. Subjects were of either sex having age 16 and above. All subjects were assessed using following structured clinical instruments, Yale-brown symptom check list, Yale-brown obsessive-compulsive symptom severity scale, family burden interview, and Indian disability evaluation and assessment scale.

Trouble shooting the problems of Dry Gas Seals and Systems in Centrifugal Compressors

Case Stud

Energy-Dependent Timing of Thermal Emission in Solar Flares

We report solar flare plasma to be multi-thermal in nature based on the theoretical model and study of the energy-dependent timing of thermal emission in ten M-class flares. We employ high-resolution X-ray spectra observed by the Si detector of the "Solar X-ray Spectrometer" (SOXS). The SOXS onboard the Indian GSAT-2 spacecraft was launched by the GSLV-D2 rocket on 8 May 2003. Firstly we model the spectral evolution of the X-ray line and continuum emission flux F(\epsilon) from the flare by integrating a series of isothermal plasma flux. We find that multi-temperature integrated flux F(\epsilon) is a power-law function of \epsilon with a spectral index (\gamma) \approx -4.65. Next, based on spectral-temporal evolution of the flares we find that the emission in the energy range E= 4 - 15 keV is dominated by temperatures of T= 12 - 50 MK, while the multi-thermal power-law DEM index (\gamma) varies in the range of -4.4 and -5.7. The temporal evolution of the X-ray flux F(\epsilon,t) assuming a multi-temperature plasma governed by thermal conduction cooling reveals that the temperature-dependent cooling time varies between 296 and 4640 s and the electron density (n_e) varies in the range of n_e= (1.77-29.3)*10^10 cm-3. Employing temporal evolution technique in the current study as an alternative method for separating thermal from non-thermal components in the energy spectra, we measure the break-energy point ranging between 14 and 21\pm1.0 keV.Comment: Solar Physics, in pres

Probing the Role of Magnetic-Field Variations in NOAA AR 8038 in Producing Solar Flare and CME on 12 May 1997

We carried out a multi-wavelength study of a CME and a medium-size 1B/C1.3 flare occurring on 12 May 1997. We present the investigation of magnetic-field variations in the NOAA Active Region 8038 which was observed on the Sun during 7--16 May 1997. Analyses of H{\alpha} filtergrams and MDI/SOHO magnetograms revealed continual but discrete surge activity, and emergence and cancellation of flux in this active region. The movie of these magnetograms revealed two important results that the major opposite polarities of pre-existing region as well as in the emerging flux region (EFR) were approaching towards each other and moving magnetic features (MMF) were ejecting out from the major north polarity at a quasi-periodicity of about ten hrs during 10--13 May 1997. These activities were probably caused by the magnetic reconnection in the lower atmosphere driven by photospheric convergence motions, which were evident in magnetograms. The magnetic field variations such as flux, gradient, and sunspot rotation revealed that free energy was slowly being stored in the corona. The slow low-layer magnetic reconnection may be responsible for this storage and the formation of a sigmoidal core field or a flux rope leading to the eventual eruption. The occurrence of EUV brightenings in the sigmoidal core field prior to the rise of a flux rope suggests that the eruption was triggered by the inner tether-cutting reconnection, but not the external breakout reconnection. An impulsive acceleration revealed from fast separation of the H{\alpha} ribbons of the first 150 seconds suggests the CME accelerated in the inner corona, which is consistent with the temporal profile of the reconnection electric field. In conclusion, we propose a qualitative model in view of framework of a solar eruption involving, mass ejections, filament eruption, CME, and subsequent flare.Comment: 8 figures, accepted for publication in Solar Physic