A general quantum difference calculus Hamza, Alaa E; Sarhan, Abdel-Shakoor M; Shehata, Enas M ...
Advances in difference equations,
06/2015, Volume:
2015, Issue:
1
Journal Article
Peer reviewed
Open access
In this paper, we consider a strictly increasing continuous function
β
, and we present a general quantum difference operator
D
β
which is defined to be
D
β
f
(
t
)
=
(
f
(
β
(
t
)
)
−
f
(
t
)
)
/
(
...β
(
t
)
−
t
)
. This operator yields the Hahn difference operator when
β
(
t
)
=
q
t
+
ω
, the Jackson
q
-difference operator when
β
(
t
)
=
q
t
,
q
∈
(
0
,
1
)
,
ω
>
0
are fixed real numbers and the forward difference operator when
β
(
t
)
=
t
+
ω
,
ω
>
0
. A calculus based on the operator
D
β
and its inverse is established.
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IZUM, KILJ, NUK, PILJ, PNG, SAZU, UL, UM, UPUK
A core 30.17 m in length representing the Bahariya Formation (Cenomanian) from the Salam-IX well in the northern Western Desert of Egypt was studied. The study includes a lithologic description of ...the rock varieties, primary sedimentary structures, petrography, and surface texture of quartz grains. Fourteen lithofacies (four facies associations) in addition to six microfacies were defined. The data indicate a shallow marine depositional suite (beach, barrier island, and lagoon).
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BFBNIB, GIS, IJS, KISLJ, NUK, PNG, UL, UM, UPUK
Hypospadias is a common congenital anomalies, yet its molecular basis remains unknown. Recent studies have linked perturbations in the Hedgehog signaling pathway to hypospadias. However, the ...expression of Sonic hedgehog (Shh) has not been reported during genital development. Immunohistochemical staining for Shh and its receptors was applied to 10 human fetal penises ranging from 12 to 29 weeks gestation. The intensity of Shh staining was greatest in the urethral epithelium at 14 weeks gestation, correlating with the time of urethral tubularization. Results suggest a role for Shh in human male genital development.
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DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
In this article, we introduce a new generalization of the Exponentiated Exponential distribution. Various structural mathematical properties are derived. Numerical analysis for mean, variance, ...skewness and kurtosis and the dispersion index are performed. The new density can be right skewed and symmetric with "unimodal" and "bimodal" shapes. The new hazard function can be "constant", "monotonically decreasing", " monotonically increasing", "increasing-constant”, “upside-down-constant", "decreasing-constant". Many bivariate and multivariate type model have been also derived. We assess the performance of the maximum likelihood method graphically via the biases and mean squared errors. The applicability of the new life distribution is illustrated by means of two real data sets.
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DOBA, IZUM, KILJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
The Paleozoic rocks in North Africa are prolific with source rocks that contribute petroleum to giant fields especially in Algeria and Libya. The coeval subsurface source rocks from the Devonian and ...Carboniferous in the Western Desert of Egypt have been evaluated in the present study. The rocks from Zeitoun, Desouqy, and Dhiffah formations have been evaluated based on integration of the palynofacies, organic geochemical analysis, and well logging. The study depends on samples from five wells that are Buchis-1X, Phiops-1X, Siwa-D-1X, Tayim West-1X, and WKAL C-1XST. The distribution of palynofacies categories are statistically investigated by the principal component analysis (PCA) that specified the proximal-distal environmental trends by the values of component 1 that attributed to the terrestrial organic sources. The analyses revealed mostly poor, fair to good organic enrichments and poor to fair source potential in the studied rocks. The samples are mostly thermally mature, uncontaminated, and of gas prone type III and mixed oil/gas prone type II/III kerogen. The geological conditions that lead to the large difference in the hydrocarbon source potentiality between western North Africa and source rocks evaluated in this study from Egypt have been discussed. It is suggested that these differences resulted from the larger thickness of Paleozoic rocks and the increase in burial depths of the depocenters in the western side that lead to higher maturity levels that are responsible for the organic conversions and hydrocarbon expulsion.
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EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, KILJ, KISLJ, MFDPS, NLZOH, NUK, OBVAL, OILJ, PNG, SAZU, SBCE, SBJE, SBMB, SBNM, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
Hirschsprung disease (HSCR) can be diagnosed using a variety of histological and immunohistochemical methods and stains. Because of the nature of the condition and the need for a rapid diagnostic ...confirmation, those methods with high accuracy and fast turnaround times are preferred. The authors of this paper have used rapid acetylcholinesterase (AChE) immunohistochemistry in conjunction with standard H&E in order to optimize diagnostic accuracy, and present a modified rapid AChE method (MRAM) that has been successfully utilized for over 20 years. The authors also present a list of over 30 different methods and stains that have been proposed for Hirschsprung disease diagnosis.
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DOBA, IJS, IZUM, KILJ, NUK, PILJ, PNG, SAZU, SIK, UILJ, UKNU, UL, UM, UPUK
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Is to investigate the clinical significance of pulmonary shadows in these patients, and to distinguish malignant from benign opacities and attention should be paid to the pathological diagnosis of those opacities in order to avoid over or under treatment.
Prospective, observational study conducted in Chest and Oncology departments, Zagazig University Hospitals, in the period from October 2014 to September 2016. The study was carried out on 100 patients with pathologically and clinically proved extrapulmonary malignant neoplasm and different radiological pulmonary lesions undiagnosed. CT chest and bronchoscopy were done for all patients and Samples were subjected to cytology, histopathology, AFB staining, fungal smear and culture/sensitivity, depending upon the findings.
The results of pathological types of lung lesions revealed that metastatic lesions (69%) were the commonest followed by benign lesions (18%) and primary lung cancer (13%). Patients with current smoking history and advanced stage of primary tumor have significant liability to have lung malignancy. Also, patients who showed multiple pulmonary nodules, ground glass opacities and mass in their CT finding have higher liability to have lung malignancy rather than other findings with high statistical significance (P value <0.001).
Patients presented with advanced stages of primary extrapulmonary malignancy, current or former smokers, with multiple pulmonary nodules or mass in computed tomography of the chest, were more liable for being malignant and needs diagnostic biopsies.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Oligodendrocyte progenitor cells (OPCs) are widely distributed cells of ramified morphology in adult brain that express PDGFRα and NG2. They retain mitotic activities in adulthood and contribute to ...oligodendrogenesis and myelin turnover; however, the regulatory mechanisms of their cell dynamics in adult brain largely remain unknown. Here, we found that global Pdgfra inactivation in adult mice rapidly led to elimination of OPCs due to synchronous maturation toward oligodendrocytes. Surprisingly, OPC densities were robustly reconstituted by the active expansion of Nestin+ immature cells activated in meninges and brain parenchyma, as well as a few OPCs that escaped from Pdgfra inactivation. The multipotent immature cells were induced in the meninges of Pdgfra-inactivated mice, but not of control mice. Our findings revealed powerful homeostatic control of adult OPCs, engaging dual cellular sources of adult OPC formation. These properties of the adult oligodendrocyte lineage and the alternative OPC source may be exploited in regenerative medicine.
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•Oligodendrocyte progenitor cells (OPCs) disappeared and then repopulated in CAGG-iKO mice•Repopulated OPCs are partly derived from pericyte and/or mesenchymal cell population (PC/MC)•PC/MC-derived OPCs differentiate into MBP-expressing mature oligodendrocytes
Đặng et al. show that oligodendrocyte progenitor cells (OPCs) are repopulated from pericyte and/or mesenchymal cell population (PC/MC) and from OPCs that escape Pdgfra inactivation. PC/MC-derived OPCs can differentiate into MBP-expressing mature oligodendrocytes. Our findings reveal a mechanism of homeostatic control of adult OPCs engaging dual cellular sources of adult OPC formation.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NLZOH, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UILJ, UL, UM, UPCLJ, UPUK, ZAGLJ, ZRSKP
Abstract
OnBehalf
YIG-CVR
Introduction
Increased left atrial (LA) size was associated with poor cardiovascular outcomes such as the development of heart failure, atrial fibrillation (AF), and stroke ...in the elderly.
Aim of the work
To determine the relation between left atrial volume index (LAVI) and the occurrence of ischemic cerebrovascular stroke (CVS) in patients with sinus rhythm.
Patients and Methods
A prospective analysis of the data of patients admitted to a tertiary care center. Left atrial volume index (LAVI) was measured in 1222 patients admitted to our center with first attack of acute ischemic cerebrovascular stroke (CVS) and the data was matched with 1222 patients admitted by diagnoses other than acute ischemic stroke.
Patients with valvular heart diseases, history of AF and with known cardio-embolic source of stroke as left ventricular thrombi or masses were excluded from both groups.
Results
The mean age was 61.1 ± 14.4 years in the CVS group and 61.5 ± 12.4 years in the control group, males were 806 (71.43%) in the CVS group and 852 (73.47%) in the control group. LAVI was 35 ± 10.3 ml/m2 in the CVS group while it was only 25.8 ± 6.4 ml/m2 in the control group which was statistically significant (P value= 0.002).
Conclusion
LAVI is a strong parameter that can be used to predict the occurrence of CVS in patients with sinus rhythm.
Total (n = 2444) Acute CVS (n = 1222) No CVS (n = 1222) P-value Age (years) 61.1 ± 14.4 61.5 ± 12.4 0.75 Sex (Males) 806 (66%) 852 (70%) 0.65 Diabetes 655 (53.6%) 603 (49.3%) 0.6 Hypertension 702 (57.5%) 675 (55.2%) 0.55 Smoking 599 (49%) 564 (46.2%) 0.71 Dyslipidemia 310 (25.4%) 299 (24.5%) 0.81 Mean BP (mmHg) 122 ± 15 119 ± 17 0.88 Heart rate (bpm) 82 ± 16 85 ± 18 0.76 Hemoglobin (g/dl) 12.3 ± 1.3 12.9 ± 1.7 0.61 Platelets (103/l) 255 ± 110 235 ± 95 0.35 INR 1.15 ± 0.11 1.09 ± 0.18 0.75 Ejection fraction (%) 55 ± 12 51 ± 11 0.41 LAVI (ml/m2) 35 ± 10.3 25.8 ± 6.4 0.002* Results are represented as number (%) or mean ± standard deviation, BP = Blood Pressure, INR = International Normalization Ratio, * significant P value < 0.05
Abstract P1506 Figure. Comparison between both groups
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