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Shift generated dual frames for locally compact abelian groups
Ahmad Ahmadi,Ataollah Askari-Hemmat 대한수학회 2012 대한수학회지 Vol.49 No.3
Let G be a metrizable, σ-compact locally compact abelian group with a compact open subgroup. In this paper we dene the Gramian and the dual Gramian operators for shift invariant subspaces of L2(G)and we use them to characterize shift generated dual frames for shift in-variant spaces, which forms a frame for a subspace of L2(G). We present necessary and sufficient conditions for which standard dual is a unique SG-dual frame of type I and type II.
SHIFT GENERATED DUAL FRAMES FOR LOCALLY COMPACT ABELIAN GROUPS
Ahmadi, Ahmad,Askari-Hemmat, Ataollah Korean Mathematical Society 2012 대한수학회지 Vol.49 No.3
Let $G$ be a metrizable, ${\sigma}$-compact locally compact abelian group with a compact open subgroup. In this paper we define the Gramian and the dual Gramian operators for shift invariant subspaces of $L^2(G)$ and we use them to characterize shift generated dual frames for shift in- variant spaces, which forms a frame for a subspace of $L^2(G)$. We present necessary and sufficient conditions for which standard dual is a unique SG-dual frame of type I and type II.
Ahmad Jonidi Jafari,Babak Kakavandi,Nemat Jaafarzadeh,Roshanak Rezaei Kalantary,Mehdi Ahmadi,Ali Akbar Babaei 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.45 No.-
Fenton-like catalytic degradation of tetracycline (TC) was studied by using ferro–ferric oxide (Fe3O4)nanoparticles coated on activated carbon (AC@Fe3O4) which acts as a peroxidase mimetic and persulfate(PS) as a green oxidant. Adsorption and degradation experiments were carried out in a batch system asfunctions of pH, PS, catalyst and TC concentrations. Kinetic and pathway of TC degradation by AC@Fe3O4/PS system was also investigated. Under the optimum conditions, the removal efficiency of TC and totalorganic carbon (TOC) were 99.8 and 50.6%, respectively. AC@Fe3O4 retained its activity and degradationefficiency remained even afterfive concessive cycles of use
Ameri, Ahmad,Mortazavi, Nafiseh,Ahmadi, Helaleh Khoshbakht,Novin, Kambiz Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.no.sup3
To investigate whether excision repair cross complementing-group1 (ERCC1) expression status could serve as a bio-predictor of response to platinum-based induction chemotherapy for head and neck cancers (HNCs) patients with a diagnosis of epithelial HNC were studied retrospectively. Paraffin embedded tumor samples of the patients were analyzed by reverse transcription-polymerase chain reaction (RT-PCR) to determine ERCC1 expression status and its correlation with response to platinum-based induction chemotherapy was investigated. Of 44 included patients, 33 were male (75%) and 11 were female (25%) with a mean age of 53 years. Some 36% of patients whose tumor samples had high ERCC1 expression showed no response to induction chemotherapy. The value for patients with low ERCC1 expression was 9% and the difference was statistically significant (p=0.03). The ERCC1 expression state did not significantly vary between patient groups according to sex, age, primary tumor site, and tumor and node stage. Our study indicates that ERCC1 expression status detected by RT-PCR might serve as a bio-predictor of response to platinum-based induction chemotherapy for epithelial HNCs.
Pre-pregnancy Body Mass Index and Maternal Nutrition in Relation to Infant Birth Size
Shabbou Ahmadi Bonakdar,Ahmad Reza Dorosty Motlagh,Mohammad Bagherniya,Golnaz Ranjbar,Reza Daryabeygi-Khotbehsara,Seyed Amir Reza Mohajeri,Mohammad Safarian 한국임상영양학회 2019 Clinical Nutrition Research Vol.8 No.2
This cross-sectional study examined the relationship between maternal pre-pregnancy body mass index (BMI) and dietary intake on birth size in the north-east part of Iran. Maternal information including BMI and dietary intake from 453 healthy pregnant women were collected in 2013–2014. Maternal pre-pregnancy BMI were obtained from health records and dietary intakes in third trimester were collected by using a validated food frequency questionnaire (FFQ), which consisted of 160 Iranian foods. Anthropometric measurements of neonates including weight, height, and head circumference were 3.19 ± 0.49 kg, 50.24 ± 2.1 cm, and 34.61 ± 1.5 cm, respectively. A significant difference was found in neonatal birth weight (p < 0.001) and head circumference (p = 0.002) between underweight and obese mothers. Furthermore, maternal intake of fat had a direct correlation with birth size. There was a positive relationship between vitamin A and potassium intake and birth height. The article concludes that normal maternal pre-pregnancy weight and appropriate diet are likely essential for healthy babies.
( Reza Talebi ),( Ahmad Ahmadi ),( Fazlollah Afraz ) 한국축산학회(구 한국동물자원과학회) 2018 한국축산학회지 Vol.60 No.6
After pubertal, cohort of small antral follicles enters to gonadotrophin-sensitive development, called recruited follicles. This study was aimed to identify candidate genes in follicular cyclic recruitment via analysis of protein-protein interaction (PPI) network. Differentially expressed genes (DEGs) in ovine granulosa cells of small antral follicles between follicular and luteal phases were accumulated among gene/protein symbols of the Ensembl annotation. Following directed graphs, PTPN6 and FYN have the highest indegree and outdegree, respectively. Since, these hubs being up-regulated in ovine granulosa cells of small antral follicles during the follicular phase, it represents an accumulation of blood immune cells in follicular phase in comparison with luteal phase. By contrast, the up-regulated hubs in the luteal phase including CDK1, INSRR and TOP2A which stimulated DNA replication and proliferation of granulosa cells, they known as candidate genes of the cyclic recruitment.
Robin Eelsing,Ahmad Masih Ahmadi,Jens Anthony Halm,Tim Schepers 대한정형외과학회 2024 Clinics in Orthopedic Surgery Vol.16 No.1
Background: The sinus tarsi approach (STA) has gained popularity for the treatment of displaced intra-articular calcaneal fractures. No large studies comparing wound complications worldwide after STA surgery are available. The aim of this systematic review was to compare postoperative wound complication (POWC) and postoperative wound infection (POWI) rates following STA surgery between continents and countries and their differences in climate. Methods: A literature search was performed using the databases of PubMed, Embase, and the Cochrane Library. Studies published before January 1, 2000, including < 10 patients and written in a language other than English were excluded. Results: In total, 86 studies containing 4,392 surgeries via STA from 20 different countries were included. The mean POWC was 5.9% and the mean POWI was 4.4%. The highest median POWC rate was in North America (8.5%) and the lowest in South America (2.0%). No significant differences were found in the POWC and POWI rates between countries (p = 0.178 and p = 0.570, respectively), but significant differences were found between the POWC and POWI rates between continents (p = 0.011 and p = 0.036, respectively). The number of surgeries per year and climate differences, as represented by mean local temperature, were not correlated with both the POWC/POWI rates and functional outcome scores. Conclusions: Significant differences between the POWC and POWI rates were found between continents but not between individual countries. With a mean POWC of 5.9% and a mean POWI rate of 4.4%, STA has an intrinsic low risk for complications given the minimally invasive nature of the approach and is inevitably becoming the gold standard for calcaneal surgery.