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Bulunan: 29 Adet 0.001 sn
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Sürdürülebilir Şehirler ve TopluluklarŞehirleri ve insan yerleşimlerini kapsayıcı, güvenli, dayanıklı ve sürdürülebilir kılmak
Technical, Science and Applied SciencesKırgızistan-Türkiye Manas Üniversitesi Kurum Koleksiyonu
Erişime Açık

H-infinity-NORM EVALUATION FOR A TRANSFER MATRIX VIA BISECTION ALGORITHM

Ercan ÇELİK

In this paper, we compute H.-norm of a transfer matrix, via bisection algorithm. The algorithm is given and applied some problems. The problems are choosen from various areas of control theory such as aircraft models and decentralized interconnected systems.

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Potential Impacts of Climate Change on Plant Diversity of Sary-Chelek Biosphere Reserve in Kyrgyzstan

Nazgül İMANBERDİYEVA | Zeki SEVEROĞLU

The Sary-Chelek Nature Reserve established in 1959 with an area of 239 km2 and declared as a UNESCO-MAB Biosphere Reserve in 1978 is located on the southeast-facing slope of the northern Chatkal Range in central Jalalabad province. It is centered around the scenic Sary-Chelek Lake. The mountains immediately surrounding the lake abound in exceptionally diverse flora and fauna, what may be the widest variety found in the Tian Shan. The area is spread over varied ecosystems and habitats, which include the forests of spruce and juniper together with the forests of wild fruits and nuts and riparian ...Daha fazlası

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The inequalities on dual numbers and their topological structures

Olgun DURMAZ

Inequalities are frequently used in various fields of mathematics to prove theorems. The existence of inequalities contributes significantly to the foundations of such branches. In this paper, we study the properties of order relations in the system of dual numbers, which is inspired by order relations defined on real numbers. Besides, some special inequalities that are used in various fields of mathematics, such as Cauchy-Schwarz, Minkowski, and Chebyshev are studied in this framework. An example is also provided to validate our research findings. Keywords: dual numbers; dual absolute value; ...Daha fazlası

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A Multi-Objective Mathematical Programming Model for Transit Network Design and Frequency Setting Problem

İbrahim AKGÜN

In this study, we propose a novel multi-objective nonlinear mixed-integer mathematical programming model for the transit network design and frequency setting problem that aims at designing the routes and determining the frequencies of the routes to satisfy passenger demand in a transit network. The proposed model incorporates the features of real-life transit network systems and reflects the views of both passengers and the transit agency by considering the in-vehicle travel time, transfers, waiting times at the boarding and transfer stops, overcrowding and under-utilization of vehicles, and v ...Daha fazlası

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Ecological aspects in the use of soil enzymes as indicators of anthropogenic soil pollution

Nurzat TOTUBAYEVA

In the contemporary era, with rapid industrial growth and urbanisation, analysing the impact of human activities on soil enzyme activity becomes crucial. The purpose of this study is to assess the influence of anthropogenic pollution on enzyme activity in soil. Research on enzyme activity levels in the soil in the city of Kara-Balta, Chuy Region, Kyrgyz Republic, was conducted using biochemical analyses and specific enzymatic tests. The results revealed significant diversity in catalase activity in different soil samples. Some samples exhibited high activity, while others showed low activity. ...Daha fazlası

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Assessment of Cd-induced genotoxic damage in Urtica pilulifera L. using RAPD-PCR analysis

İlhan DOĞAN

Plants can be used as biological indicators in assessing the damage done by bioaccumulation of heavy metals and their negative impact on the environment. In the present research, Roman nettle (Urtica pilulifera L.) was employed as a bioindicator for cadmium (Cd) pollution. The comparisons between unexposed and exposed plant samples revealed inhibition of the root growth (∼25.96% and ∼45.92% after treatment with 100 and 200 µmol/L Cd concentrations, respectively), reduction in the total soluble protein quantities (∼53.92% and ∼66.29% after treatment with 100 and 200 µmol/L Cd concentrations, re ...Daha fazlası

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Detection of physiological and genotoxic damages reflecting toxicity in Kalanchoe clones

İlhan DOĞAN

In order to make assessments in understanding of physiological and genotoxic effects of imposing cadmium (Cd) on photosynthetic pigment contents along with the changes occurring in genetic material of Kalanchoe plants were used in relation to various Cd-treatments. Young plantlets were originated from a single host plant as clones, and developed in vitro. Developed clones were grown in standard pots with daily watering of Hoagland solution (20 ml) containing different concentrations of cadmium chloride for two months. Cd concentrations of the collected samples were measured by employing ICP-OE ...Daha fazlası

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The usability of Juniperus virginiana L. as a biomonitor of heavy metal pollution in Bishkek City, Kyrgyzstan

Zeki SEVEROĞLU | İlhan DOĞAN | Gülbübü KURMANBEKOVA

Uncontrolled and unplanned urbanization and industrialization due to increase of population and rapid industrial development have created severe environmental problems in Kyrgyzstan during the last few decades. In this study, Juniperus virginiana, a dioecious species, was employed in order to make assessment of the heavy metal pollution rate in the area and of the heavy metal pollution impact on the mineral nutrient status of the plant. For this study, leaf (washed and unwashed) and bark samples of J. virginiana, and its co-located soil samples were collected from eight different stations, all ...Daha fazlası

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Microbiological quality of water buffalo yoghurts retailed in Kayseri = Kayseri İlinde Satışa Sunulan Manda Yoğurtlarının Mikrobiyolojik Kalitesi

Zafer GÖNÜLALAN

Bu çalışmada Kayseri'de satışa sunulan manda yoğurtlarının mikrobiyolojik kalitesinin ortaya konulması amaçlandı. Bu amaçla Kayseri ili ve ilçelerindeki halk pazarlarından temin edilen 100 adet manda yoğurdu örneği materyal olarak kullanıldı. Toplanan örnekler Koliform grubu bakteriler, Escherichia coli, Staphylococcus aureus, Salmonella spp., maya-küf, toplam aerobik mezofilik bakteri (TAMB) ve laktik asit bakterileri (LAB) yönünden incelendi. İncelenen 100 adet yoğurt numunesinin 18'inde (%18) ortalama 14,8±0,24 EMS/g koliform bakteri, 9'unda (%9) 1,85±0,18 EMS/g E. coli ve 7'sinde (%7) 4,9± ...Daha fazlası

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The Problem of Terrorism in Central Asia and Countering Terrorist Activities in Kyrgyzstan

Bakıt BORKOYEV

This article discusses the sources and characteristics of terrorism in Central Asia, particularly in Kyrgyzstan as well as the scope and effectiveness of counter-terrorism measures in the region. The article analyzes the threats to regional security, nature of radicalism, reasons of population's involvement in radical politics and the impact of Afghanistan on the problem of terrorism in the region. The article also focuses on the phenomenon of terrorism in Kyrgyzstan by identifying its main causes, such as weak political institutions, the crisis of ideology in the post-Soviet era and Kyrgyzsta ...Daha fazlası

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Cadmium-induced physiological and genotoxic alterations in Bryophyllum daigremontianum

Zeki SEVEROĞLU

When evaluating the negative impacts of heavy metals in the environment, plants can be used as biological indicators in assessing damage done by bio-accumulation of heavy metals. For detecting the genotoxic effects of heavy metals, the RAPD-PCR technique is applied in plants. In this study, Blyophyllum daigremontianum was used as a bio-indicator for Cadmium (Cd) pollution. B. daigremontianum plantlets were obtained from bulbiliferous spurs. They were grown singly in standard pots and each of the experimental groups of 5 replicates were watered daily with Hoagland solution (20 ml) containing 0, ...Daha fazlası

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Method of spherical harmonic series in the problem of minimization of atmosphere pollution by fractions of harmful admixtures

Ramiz RAFATOV

The problem of minimization of atmosphere pollution by fractions of harmful admixtures is studied. It is supposed that a controlled object is described by non-stationary integral–differential transfer equation with special boundary conditions and control parameters, which are included in the right part of equation as delta-functions. Minimized integral quadratic functional characterizes energy expenditure for control and depends on the average squared deflection of fraction concentration from the desired final state. Optimal conditions are obtained with the help of Pontryagin’s maximum princip ...Daha fazlası

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