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Predetermination of potential plastic hinges on reinforced concrete frames using GFRP reinforcement

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Frontiers of Structural and Civil Engineering 2022年第5期16卷 624-637页

作者： Dominik KUERES dritan TOPUZI Maria Anna POLAK Department of Civil and Environmental Engineering University of WaterlooWaterlooON N2L 3G1Canada Schoeck Canada Inc. OttawaON K1P 5G3Canada

In the past,glass fiber-reinforced polymer(GFRP)-reinforcement has been successfully applied in reinforced concrete(RC)structures where corrosion resistance,electromagnetic neutrality,or cuttability were *** investigations suggest that the application of GFRP in RC structures could be advantageous in areas with seismic activity due to their high deformability and ***,especially the low modulus of elasticity of GFRP limited its wide application as GFRP-reinforced members usually exhibit considerably larger deformations under service loads than comparable steel-reinforced *** overcome the aforementioned issues,the combination of steel and GFRP reinforcement in hybrid RC sections has been investigated in the *** on this idea,this paper presents a novel concept for the predetermination of potential plastic hinges in RC frames using GFRP *** analyze the efficiency of the concept,nonlinear finite element simulations were *** results underscore the high efficiency of hybrid steel-GFRP RC sections for predetermining potential plastic hinges on RC *** results also indicate that the overall seismic behavior of RC structures could be improved by means of GFRP as both the column base shear force during the seismic activity as well as the plastic deformations after the earthquake were considerably less pronounced than in the steel-reinforced reference structure.

关键词： glass fiber-reinforced polymer GFRP hybrid section plastic hinge seismic design reinforced concrete

The effect of chemical structure of carboxylate molecules on hydroxyapatite nanoparticles.A structural and morphological study

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Bioactive Materials 2021年第8期6卷 2360-2371页

作者： Lorenzo Degli Esposti Alessio Adamiano dritan Siliqi Cinzia Giannini Michele Iafisco Institute of Science and Technology for Ceramics(ISTEC) National Research Council(CNR)Via Granarolo 6448018FaenzaItaly Institute of Crystallography(IC) National Research Council(CNR)Via Amendola 122/O70126BariItaly

Being the most abundant non-macromolecular organic component of bone,the role of citrate(Cit)in hydroxyapatite(HA)crystallization is of high *** this work we have investigated the influence of hydroxycitrate(CitOH)and glutarate(Glr)on HA crystallization in terms of particle growth,composition,and morphology in comparison to *** and Glr have been selected for this work because they share the same backbone structure of Cit but bear different functional groups in the central *** data has revealed that CitOH strongly inhibits HA crystallization more efficiently than ***-HA nanoparticles are composed of platy,elongated particles similar to those of Cit-HA but they are *** smaller and have a lower crystal *** the other hand,Glr does not inhibit HA crystallization as Cit,but leads to the formation of OCP platelets that convert with maturation time to HA nanorods with larger aspect ratio than *** comparison to Cit-HA samples,Glr-HA nanoparticles have bigger dimensions,and higher structural ***,our data reveal that the central carboxyl group of Cit is involved in the selective binding with HA crystal surface and in regulating HA crystal *** results of this work highlight new possibilities to control the formation of HA for designing advanced bioactive materials and give new insights on the role of the structure of Cit in regulating the HA morphology.

关键词： Hydroxyapatite Nanoparticles Biomineralization Citrate Carboxylates Hydroxycitrate Glutarate

Regulating Aspects and Geologic Solutions of the Natural Gas Building Capacities to a Gas Market Model in Albania

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Journal of Earth Science and Engineering 2014年第12期4卷 709-717页

作者： Puka Vladimir Spahiu dritan Department of Natural Sources Faculty of Geology and Mining Polytechnic University of Tirana Tirana 1003 Albania Directorate of Policies and Development of Hydrocarbons at Ministry of Energy & Industry Tirana 1001 Albania

Caspian Gas into Balkans over medium to long term becames Albanian case on June 2013 when TAP route was selected. After Albanian National Territory Council approved TAP AG＇s Compound Development Permit, the project should start Construction Phase 1. Existing gas pipeline connections of Albania within the European network via TAP, is highly estimated by energy authorities in both technical and regulating aspects. New pipelines are projected to be build in order to meet local energy consume and seasonal fluctuations, as well as needs of Kosovo and FYROM. Some of important points： determination on the capacity sector building for a due Albanian Gas Market Model, supply options on the future gasification, alternatives of opening underground gas storages in the salt domes of Dumre region and extending pipelines to neighboring countries. By assistance of the Secretariat of Energy Community, MEI starts drafting the new gas law to meet Third Energy Package. TAP project, IAP project, Albania-Kosovo Pipeline, an LNG plant and terminals coastal construction, can contribute on the diversification of gas supply. Underground Gas Storage potentials are geologic solution target, considering the Upper Miocene depleted sandstone gas fields of Divjaka, as well as the Dumre evaporitic deposits diapir of the Upper Triassic.

关键词： Natural gas supply demand capacity build storage.

Use of Cholesterol-Lowering Medications of Patients with Myocardial Infarction from 2007-2015 in Cardiology Clinic to “Mother Teresa” University Hospital in Albania

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Pharmacology & Pharmacy 2016年第6期7卷 236-245页

作者： Kleva Shpati Rudina Prifti dritan Shpati Zana Bruci Erina Hilaj Department of Pharmacy Albanian University Tirana Albania Hospital Mbreteresha Geraldine Tirana University Tirana Albania Faculty of Medicine Tirana University Tirana Albania

Background: Coronary Heart Disease (CHD) remains the leading cause of morbidity and mortality in Albania. According to Institute of Statistics of Albania (ISA), CHD remains in the 5 first places caused mortality and morbidity in our country. Currently, all the protocol treatments to Mother Teresa University Hospital (MTUH) are focused on low-density lipoprotein cholesterol (LDL-C) as the primary target for risk reduction therapy, followed by triglycerides (TG) and high-density lipoprotein cholesterol (HDL). Our clinicians recommend that the intensity and target goals of LDL-C-lowering therapy should be adjusted to individual treatment. The choice of a specific drug from anti hypercholesterolemia class depends on several factors which need to be evaluated better from our health providers. Methods and Findings: Data was collected between 2007 to 2015 at Mother Teresa University Hospital (MTUH), Intensive Care Unit in Cardiology Clinic. 700 patients were treated with statins as follows: Fluvastain 40 mg and 80 mg, Atorvastatin 10 mg and 20 mg, Simvastatin and Rosuvastatin 20 mg. Statins are increased significantly during the years compared with fibrates. Their use grew from 87% of all statin types to 95% in 2015, with different types from fluvastatin in 2007 to atorvastatin being the leading medication in 2015. Coronary Heart Disease, especially Myocardium Infarct, were studied as diseases when meanly the hypolipidic drugs were usually used in medical protocol treatment. Statins and fibrates were the therapy target to be studied when statin dominated the patients’ treatment and fibrates were used in limited quantity. Atorvastatin is now dominating the market, while fluvastatin was on the first statin therapy for several years in the past. Fibrate were used in the modest quantities in value from 2% to 1.5% in years 2007 to 2015. The use of statins in moderate-risk and high-risk patients showed continued growth subsequently, but stable with dosage of atorvastatin 20 mg.

关键词： Statins Fibrate Coronary Heart Disease Risk Factors Adverse Drug Events Etc.

Impact of Bacterial and Somatic Cells Content on Quality Fresh Milk in Small-Scale Dairy Farms in Kosovo

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Food and Nutrition Sciences 2013年第10期4卷 1014-1020页

作者： Hysen Bytyqi Idriz Vehapi Sejdi Rexhepi Mentor Thaqi dritan Sallahi Ibrahim Mehmeti Faculty of Agriculture and Veterinary University of PrishtinaPrishtinaKosovo Norwegian University of Life Sciences(UMB) AsNorway

The basic goal of this research was to determine the impact of the presence of bacterial (CFU) and somatic cells count content (SCC) in quality of fresh milk in some small cattle farms in Kosovo. The survey was based on existing standards for milk quality in Kosovo placed under administrative guidance MA-no. 20/2006. The study was based on fresh milk analysis of 150 farms performed during the period September-December 2012, which was obtained in 9 different localities (collection points) of the Kosovo. Our study reveals that CFU and SCC in fresh milk were significantly affected by a number of factors, as: sampling period (repetition), locality, breed, and time of sampling (evening or/and morning). According to the results for CFU and SCC, there were big differences between the farms (milk collection points) included in the study (P < 0.0403) and (P < 0.0293). The results show that small size breed like Busha and its crosses tend to be less exposed to SCC/mL in milk (72.840) and (293.592), compared to Black Holstein (613.462), Simmental (521.519) and Brown Swiss (418.44). Milk produced in evening tended to be of better quality (259.854 CFU/mL) compared to the one from morning milking (576.689 CFU/mL). Fresh milk quality analyzed in the third repetition was better for about 33.3% compared with the repletion first. For CFU and SCC, the analyses show that about 74.7% and 64.7% of milk produced belongs to extra quality, while lower quality of milk of category three is 12.0% and 23.3%, respectively. Considering that about 85% of milk produced in Kosovo comes from small-scale dairy farms, the current study sets out that small-scale milk production system cannot be neglected by interest parties in dairy sector and needs permanent following up and improvement.

关键词： Fresh Milk Bacteria Content Somatic Cell Milk Quality Standards