Radar HRRP Modeling using Dynamic System for Radar Target Recognition

High resolution range profile (HRRP) is being known as one of the most powerful tools for radar target recognition. The main problem with range profile for radar target recognition is its sensitivity to aspect angle. To overcome this problem, consecutive samples of HRRP were assumed to be identically independently distributed (IID) in small frames of aspect angles in most of the related works. Here, considering the physical circumstances of maneuver of an aerial target, we have proposed dynamic system which models the short dependency between consecutive samples of HRRP in segments of the whole HRRP sequence. Dynamic system (DS) is used to model the sequence of PCA (principal component analysis) coefficients extracted from the sequence of HRRPs. Considering this we have proposed a model called PCA+DS. We have also proposed a segmentation algorithm which segments the HRRP sequence reliably. Akaike information criterion (AIC) used to evaluate the quality of data modeling showed that our PCA+DS model outperforms factor analysis (FA) model. In addition, target recognition results using simulated data showed that our method based on PCA+DS achieves better recognition rates compared to the method based on FA

Cause of murder or normal variation, which one is true?

Background: Parietal hole is formed as a result of defect or delay in the ossifying one third of the posterior parietal in the fifth month of fetal in genetic transfer of mutated gene dominant autosomal genetic. Artery, vein, meningia or brain cortex is exited through it, as for as the equal with its size. Parietal foramen is located in syndromic frame. Case Presentation: The case is Iranian 34 years old woman, that was found in dead state in the motel. The positive findings in examination: - Abrasion in skin of left upper posterior area of parietal. - Scars of cosmetic surgery and numerous tattoos. - Purple bruises in the arms. The positive findings in necropsy: - A hematoma under the right and posterior site of parietal skin in 2˟ 2 cm, under parietal skin abrasion. - A hole that it was in the posterior of right parietal bone,1 mm in diameter ,near the sagittal suture .It was extended to the inner surface of skull. -Very mild desquamation in dura mater with very mild bleeding about 2 cc above arachnoid (under dural desquamation).- A hematoma with 1˟1 cm , between the cervical muscles - A 3˟3 cm hematoma under the skin of upper and anterior of chest wall.The serologic, Toxicologic and pathologic sample were negative.Conclusion: As for as wearing in the left posterior parietal and hematoma under the skin in this area and finding a holes in mentioned area, at first, it seemed that the lesion is created by a sharp object, hard edges or shot. But in closer examinations there was no rupture on scalp and edge of the hole was perfectly sharp and smooth. Hence in order to prevent confusion in similar cases, the physician is familiar with these variations.ith these variations

Measuring neural net robustness with constraints

Despite having high accuracy, neural nets have been shown to be susceptible to adversarial examples, where a small perturbation to an input can cause it to become mislabeled. We propose metrics for measuring the robustness of a neural net and devise a novel algorithm for approximating these metrics based on an encoding of robustness as a linear program. We show how our metrics can be used to evaluate the robustness of deep neural nets with experiments on the MNIST and CIFAR-10 datasets. Our algorithm generates more informative estimates of robustness metrics compared to estimates based on existing algorithms. Furthermore, we show how existing approaches to improving robustness "overfit" to adversarial examples generated using a specific algorithm. Finally, we show that our techniques can be used to additionally improve neural net robustness both according to the metrics that we propose, but also according to previously proposed metrics

The relative frequency, clinical and laboratory findings of adult glomerulonephritidies in Tehran

Background: Renal diseases information is population-based and has great geographic variability. Due to the lack of national renal data registry system, there is no information on the prevalence rate, and clinical and laboratory features of various glomerulonephritidies (GNs) in Iran. Methods: In a retrospective cross sectional study, we analyzed 462 adult renal biopsies in Hashemi Nejad hospital, Tehran, Iran. We determined the prevalence rate and the frequency of different clinical and laboratory findings in patients with different GNs. We also compared our results with the reports from other countries. Results: There were 267(57.8) males and 195(42.2) females. The mean age (± SD) was 33.6 ± 15.7 (range, 13-75) years old. After exclusion of 55 biopsies with pathologies other than GNs and in the remaining 407 biopsies, membranous glomerulopathy (MGN) was the most common GN (23.6), followed by IgAN (13.5), membranoproliferative GN (11.5), systemic lupus nephritis (10.6), focal segmental glomerulosclerosis (10.3), and minimal change disease (9.8). These 6 GNs comprised the majority (79.4) of all GNs. Conclusion: MGN is the most common form of GN, followed by IgAN, MPGN, SLE-GN, FSGS and MCD in adult patients in our study. The multi-center studies with a larger sample size are needed for more comprehensive data in Iranian population

Influence of B cells in liver fibrosis associated with hepatitis B virus harboring basal core promoter mutations

The development of the liver disease in chronic hepatitis B with common viral variants can be determined through the interaction between the virus and the host immune response. B cells constitute half of the intrahepatic lymphocyte population with an impact on fibrosis. A proliferation-inducing ligand (APRIL) has been shown to have a co-stimulatory activity on B cells. For this study HBV DNA was amplified and then sequenced to show the presence of the basal core promoter (BCP) mutations in the serum from 57 patients with chronic hepatitis B. The range of IgD-positive B cells was detected by immunohistochemistry in liver biopsies; and patients serum was assayed for APRIL levels by enzyme immunoassay. Twenty-seven patients (47.4) harbored the A1762T-G1764A BCP mutations. Coefficients of logistic regression showed that the effect of increasing IgD-positive B cells in rising odds of the liver disease is the same in the patients with BCP mutation A1762T-G1764A and in the patients without mutation, nevertheless the effect of APRIL is not similar in these two groups of patients. Logistic regression in patients with BCP A1762T-G1764A mutations demonstrated that increasing one score of APRIL decreased the odds of fibrosis stage about 8. These results suggest that in infection with viral variants of hepatitis B virus, the population of IgD-positive B cells may play a decisive role in later stages of the liver disease which is reduced by APRIL in chronic hepatitis patients with BCP mutations. J. Med. Virol. 84:18891896, 2012. (c) 2012 Wiley Periodicals, Inc

Family caregivers burden and its related factors among iranian elderly psychiatric patients' caregivers

Background: Providing care for an old person with a psychiatric disorder is a long-term and stressful process exerting negative outcomes on the caregivers' physical, psychological, and social health. Objectives: The aim of the study was to determine the burden among family caregivers of psychiatric elderly and its related factors. Methods: This descriptive study was conducted on 200 elderly psychiatric patients via convenient sampling, referring to the zare teaching psychiatric hospital of Sari, Iran. The sampling lasted from June tomid-November, 2015. Twoquestionnaires of demographics (the elderly and caregivers) and Zarit Burden Interview were used to collect the data. The data was analyzed using descriptive and inferential statistics, such as independent t-test, Analysis of Variance (ANOVA) and Scheffe Post Hoc test. Results: The results indicated that the mean of the caregivers' age was 51.24 ± 12.16. Ninety-four percent of the caregivers were married, and 49 had higher diploma education. Sixty-seven percent reported average economic status. The findings showed 68 of caregivers came up with mild to severe burden. According to the demographics, the hours of care per week (P = 0.001) and having other psychiatric patients in the family (P = 0.006) were related to the burden. Conclusions: Significantly high caregivers' burden can overshadow the risk of low quality of care the psychiatric elderly patients and expose their caregivers' psychological health to danger. Thus, it seems that community-oriented interventions are required to reduce the burden and boost long-term quality of care by informal caregivers, such as patients' families. ©2018, Iranian Journal of Psychiatry and Behavioral Sciences

Grossansätze zur Herstellung von α,α,α',α'-Tetraaryl-1,3-dioxolan-4,5-dimethanolen (TADDOLe): Nützliche Hilfsstoffe für die EPC-Synthese und ihre Struktur im Festkörper

The large-scale preparation of α,α,α',α'-tetraaryl-1,3-dioxolan-4,5-dimethanol derivatives is described. It consists of acetalization of dimethyl tartrate and Grignard addition. The diols 2–12 thus obtained are crystalline and stable. They are useful as versatile auxiliaries for enantioselective reactions and for resolutions by clathrate formation. The X-ray crystal structure of the inclusion compound from one of the TADDOLs and CCl4 is described (6·2 CCl4) and compared with the structures of analogous derivatives, including C2-symmetrical diphosphines. Reference is given to other chiral auxiliaries containing the diaryl-methanol group