1,793 research outputs found
Electromagnetic and Weak Nuclear Structure Functions in the Intermediate Region of
We have studied nuclear structure functions and
for electromagnetic and weak processes in the region of . The nuclear medium effects arising due to Fermi motion,
binding energy, nucleon correlations, mesonic contributions and shadowing
effects are taken into account using a many body field theoretical approach.
The calculations are performed in a local density approximation using a
relativistic nucleon spectral function. The results are compared with the
available experimental data. Implications of nuclear medium effects on the
validity of Callan-Gross relation are also discussed.Comment: Published in Journal of the Physical Society of Japan (NuInt-2015
Nucleon and nuclear structure functions with non-perturbative and higher order perturbative QCD effects
We have studied the nucleon structure functions ,
by including contributions due to the higher order perturbative QCD effect up
to NNLO and the non-perturbative effects due to the kinematical and dynamical
higher twist (HT) effects. The numerical results for are
obtained using Martin, Motylinski, Harland-Lang, Thorne (MMHT) 2014 NLO and
NNLO nucleon parton distribution functions (PDFs). The dynamical HT correction
has been included following the renormalon approach as well as the
phenomenological approach and the kinematical HT effect is incorporated using
the works of Schienbein et al. These nucleon structure functions have been used
as an input to calculate the nuclear structure functions .
In a nucleus, the nuclear corrections arise because of the Fermi motion,
binding energy, nucleon correlations, mesonic contribution, shadowing and
antishadowing effects. These nuclear corrections are taken into account in the
numerical calculations to obtain the nuclear structure functions , for the various nuclear targets like , , ,
, , and which are of experimental
interest.
The effect of isoscalarity correction for nonisoscalar nuclear targets has
also been studied.
The results for the are compared with nCTEQ nuclear
PDFs parameterization as well as with the experimental results from JLab, SLAC
and NMC in the kinematic region of for several nuclei.Comment: arXiv admin note: text overlap with arXiv:1705.0990
Performance of Silicon Solar Cell with Various Surface Textures
The performance of solar cell with various surface texture patterns was reported. Wet, RIE, one and two dimensions texturing with and without the nitride antireflection coating were compared. An I-V tester calibrated by Sandia National Laboratory was used. The surface texture of the solar cells were as follows (a) solar cell with 2D texturing without nitride antireflection, (b) solar cell with 1D texturing with nitride antireflection (c) solar cell with 1D texturing without nitride antireflection, (d) solar cell with wet texturing without nitride antireflection, (e) solar cell with wet texturing with nitride antireflection (f) solar cell with RIE texturing with nitride antireflection. RIE and two dimension surface texturing showed the best output with maximum short density current of 0.042 mA/cm2 and of 0.045 mA/cm2 respectively
A rapid method for preparation of sarcolemma from frog skeletal muscle
A rapid method for the preparation of sarcolema from frog skeletal muscle has been described. The purified cell segments were transparent and devoid of contractile material. The Na+, K+ -ATPase and 5'-nucleotidase activities in sarcolemma purified by this method were comparable to those reported for sarcolemmal preparations purified by density gradient centrifugation. The preparation also possessed acid phosphatase, alkaline phosphatase and K+ -activated, ouabain-sensitive p-nitrophenyl phosphatase activities. The cholesterol to phospholipid ratio of the sarcolemma was 0.33, indicating its high purity; further, the preparation was free from mitochondria and contractile proteins
Analysis on Wearable Antenna Performance on Different Radiating Elements for GPS Application
This paper presents a study on the performance of self-manufactured electro-textile (SME-T) antenna that was designed at 1.575 GHz based on the allocated spectrum for Global Positioning System (GPS) application. However, due to its known low-conductivity characteristic, the ability of the newly developed material to perform as a good antenna shall be verified. Therefore, the performance of the antennas are compared and studied with respect to established materials such as adhesive copper tape and commercial conductive fabric named SHIELDITTM as the radiating elements. Here, four e-textile antennas having approximately the same size are fabricated and tested. The performance of all antennas, in terms of return loss, radiation pattern, gain, and efficiency; manufactured by using different radiating elements, such as copper, SHIELDITTM and SME-T fabricated on polyester fabric as the substrate are analyzed. The measured return loss and radiation pattern of SME-T antenna has proven that the antenna is well suited for wearable application. The measured antenna gain and efficiency of 0.61 dB and 25.95% are obtained and it is proven that the fabricated SME-T antenna can act as a receiving antenna designed for GPS applications which requires low gain antenna for passive monitoring
Target strength measurements on six commercially important species caught in Terengganu waters
Cancer Patterns in Karachi Division (1998-1999)
Objective: A minimal cancer incidence data for Karachi, the largest city of Pakistan, is being presented here, for the years 1998-1999. The city has a population of 9,802,134; males 5,261,712 (52.6%) and females 4,540,422 (47.4%); census 19981.
Methodology: A predominantly mixed (passive and active) registration system has evolved in Karachi, the data sources being the hospitals within the Karachi Division. The reported/retrieved cancer data sets at the Karachi Cancer Registry are checked, coded, computerised in an analytical format and analysed.
Results: The incident cancer cases registered in Karachi, during the 2-year period, 1st January 1998 to 31st December 1999 were analysed. The age-standardised incidence rate (ASR) of cancer, all sites was 132.4/100,000 for the males. Cancer of the lung 10.8%; ASR 17.3 was the most frequently recorded malignancy, followed by oral cavity 10.5%; ASR 13.2 and larynx 5.0%; ASR 7.4. The age-standardised incidence rate (ASR) of cancer, all sites was 133.0/100,000 in the females. Cancer of the breast, 32.0%; ASR 40.7 was the most frequently recorded malignancy, followed by oral cavity 8.1%; ASR 11.7 and gall bladder 3.6%; ASR 5.5.
Conclusion: The present data has been calculated with an estimated 15-20% probable under ascertainment. Tobacco-associated cancers in Karachi were responsible for 38.3% of the tumours diagnosed amongst the males. Two principal cancers, breast and oral cavity were responsible for 40.1% of the cancers in females. A rare finding was the high incidence of gall bladder cancer in the females. At present it is difficult to determine whether this indicates a genuine high risk or a selection bias. A continuous process of cancer registration to study the trends in the incidence and an adequate cancer control program are possible and essential for Pakistan and can be based on the pattern being practiced in Karachi
Deep Learning based Segmentation for Multi MR Imaging Protocols using Transfer Learning for PET Attenuation Correction.
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