Murat Kaçar

Murat Kaçar
Vēstures un filozofijas fakultāte · Computer Sciencejl

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50
Publications
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Publications

Publications (50)
Article
Full-text available
Pumpkin (Cucurbita pepo L.) has been growth in most parts of Turkey. Almost none study was performed about irrigation water requirement or evapotranspiration of pumpkin plant in Turkey. This study, therefore, was conducted to determine different irrigation strategies affect on seed yield and quality parameters of drip irrigated pumpkin during perio...
Article
Full-text available
In this study, some yield components of forage kochia (Kochia prostrata (L.) Schrad.) with different stem colour was investigated at Bahri Dagdas International Agricultural Research Institute in Konya province of Turkey. In research, red, green-red and green stem kochia were used as the plant materials. Growing seedlings in the greenhouse were plan...
Article
Partial root-zone drying (PRD), a water-saving irrigation strategy, is being tested in many field crops species. In this study, the effects of PRD on root yield, sugar yield, water use efficiency (WUE), and fertilizer-nitrogen use efficiency (FNUE) of field-grown sugar beet were compared with those of conventional deficit irrigation (CDI) and full...
Article
Full-text available
Objective: Hypertension is associated with increased platelet function. Some antihypertensive drugs have antiplatelet activity. In this study, we aimed to investigate the effects of losartan on platelet aggregation induced by adenosine diphosphate (ADP), collagen, epinephrine, ristocetin, other hematological and, inflammatory parameters. Materials...
Article
Background Tularemia is a serious and potentially life-threatening zoonosis caused by Francisella tularensis, a highly infective, gram-negative coccobacillus. Although there are plenty of case reports and studies of tularemia outbreaks, the literature is lacking in reports on dermatologic manifestations of the disease.Objectives This study aimed to...
Article
Hemoglobin A1c (HbA1c) has been used as a clinically significant evaluation tool for analyses regarding glycemic control. Guidelines recommend patients with type 2 diabetes mellitus (T2DM) should aim for an A1C≤7.0%, but real world data is limited in the elderly regarding outcomes associated with different A1C levels. A thousand six hundred Turkish...
Article
This study was conducted to evaluate trickle irrigation system performance under greenhouse conditions in Antalya Province of Turkey. For this purpose, uniformity coefficient (UC) by graphical method as well as emission uniformity (EU) was researched. The UC varied from 56% (unacceptable) to 90 % (perfect) and EU varied from 41% (poor) or (unaccept...
Article
This study analyzed the effect of three levels of drip irrigation in sugar beet (Beta vulgaris L.) production in the Middle Anatolian region of Turkey. Two deficit irrigation treatments 75% and 50% of measured soil water depletion were compared with a full irrigation control treatment. In this paper, root yield, NEY (net energy yield), EEP (efficie...
Article
Full-text available
Global warming, population increase and environmental pollution have adversely affected water resources in most countries as well as Turkey. As we all know that there is a strong relationship between sustainable water management and economic development. Approximately 90% of total area is irrigated by surface irrigation methods and about 75% of the...
Article
Full-text available
Performance evaluation of irrigation has been an important area of research for better management of water resources. The present study was carried out to evaluate the performance of pressurized irrigation systems by using the previous researches conducted by our team in the Konya Basin of Turkey. The uniformity coefficient, UC and distribution uni...
Article
Full-text available
Objective: The aim of the study is to evaluate the platelet functions with platelet aggregation tests in patients with pseudothrombocytopenia (PTCP). Methods: Fifteen (9 female and 6 male) patients with a mean age of 48 ± 4 years with PTCP (platelet count below 150 × 103/μL) and 19 (13 female and 6 male) healthy controls with a mean age of 55 ± 2 y...
Article
Full-text available
Water, a vital source for humanity and all living things throughout the history, has contributed to the formation of civilizations. It has the economical value as well as social and cultural characteristics. The land and water potentials have reduced due to rapid growing in urbanization and industrialization in Turkey. Water quality has begun to de...
Article
Agricultural production has forced researchers to focus on increasing water use efficiency by improving either new drought-tolerant plant varieties or water management for arid and semi-arid areas under water shortage conditions. A field study was conducted to determine effects of seasonal deficit irrigation on plant root yield, quality and water u...
Article
The objective of this study was to determine the energy use and input costs for irrigation in field crop production of winter wheat, maize, sugar beet, dry bean, potato, and carrot. For this purpose, irrigation data for the production of six field crops were collected through a survey of 72 farms. According to the results, the carrot crop used the...
Article
The aim of the study was to determine the effects of organic fertilizers on yield components in furrow irrigated some tomato cultivars in Konya, Turkey. As plant materials; H-2274, Olga F1, Abundance, V-200 F1, Topkapi F1, ACN-55 F1, ACN-112 F1, Porsuk F1, H-12-63-208 F1 and ACN-90 F1 tomato cultivars were used. Two different organic fertilizers na...
Article
Dry bean (Phaseolus vulgaris L.) is widely planted in the Middle Anatolian Region of Turkey, especially in the Konya-Karaman-Aksaray-Nigde districts where 20% of the total dry bean growing area is located and produces 22% of the total yield. In recent years, the farmers in the Konya basin have been applying high amounts of irrigation water in order...
Article
The clogging of emitters is a common problem in trickle irrigation systems. Partial or complete clogging adversely affects uniform water distribution, as well crop yield. Despite the quantity of research cited in previous studies about the quality treatment and distribution uniformity of irrigation water, the problem still present. The research was...
Article
Full-text available
This study was conducted to investigate the effect of different irrigation and nitrogen levels on lettuce yield characteristics in greenhouse condition from December 2006 to March 2007. Irrigation levels of 100% of total class A pan (S1), 80% of total class A pan (S2), 60% of total class A pan (S3) and nitrogen levels of 0 kg ha -1 (N1), 100 kg ha...
Article
Full-text available
-1 was selected in irrigation treatments. The parameters affected the wetted soil volume of vertical wetting front advance Zf, lateral wetting front advance within the soil profile Rs or at the surface Rf, were researched. The Zf and Rs varied 43 to 58 cm and 54 to 60 cm, respectively. Different emitter discharges had no significant effects on Zf,...
Article
Elevation in hepatic enzymes during the course of malignant hematological diseases may cause diagnostic difficulty. Here we present a patient who developed severe hepatotoxicity due to cytosine arabinoside (Ara-C) for treatment of acute myeloid leukemia. In the majority of patients, several drugs were used together with Ara-C during the course of t...
Article
The objective of the present experiment was set to investigate the effects of temperature variations on egg production, feed intake, number of cracked eggs, egg shell strength, egg weight, body weight, mortality rates, and manure moisture content in caged layers. The experiment was conducted in three different environmental temperatures, namely coo...
Chapter
Full-text available
Boron toxicity may occur in semi-arid regions due to high levels of B in soils, in the ground water, in fertilisers or in irrigation water (U.S. Salinity Lab. Staff, 1954; Nable et al., 1997).
Article
The study investigated the differences in T-wave morphology between normal controls, patients with an uncomplicated follow-up after a myocardial infarction (MI), and patients with ischaemic heart disease and a history of ventricular tachycardia/fibrillation (VT/VF). The study population consisted of 164 healthy patients (age 53.4 +/- 18.7 years old...
Conference Paper
Full-text available
This study investigated the effect of posture on the T-wave morphology in healthy subjects. Standard 12-lead ECGs were digitally recorded from 70 healthy subjects. From each subject, 10 consecutive ECGs were taken in each of the supine, sitting, and standing positions. T-wave morphology indices included: the total cosine R-to-T (TCRT), normalized T...
Conference Paper
Full-text available
This study examined the reproducibility of T-wave morphology assessment in 54 patients with hypertrophic cardiomyopathy (HC) and 70 healthy subjects (HS). Studied indices included: the total cosine R-to-T (TCRT), T-wave morphology dispersion (TMD) and normalized T-wave loop area (TLA). The reproducibility was assessed by coefficient of variance (CV...
Article
Available descriptors of irregularities of ventricular repolarization are of limited clinical value. We studied the effect of autonomic variations on several new descriptors of the three-dimensional T loop. Twelve-lead digital ECGs were recorded continuously in 40 healthy subjects at baseline in the supine position, during postural changes (supine-...
Article
Our studies deal with fully automatic measurement of heart rate variability (HRV) in short term electrocardiograms. Presently, all existing HRV analysis programs require user intervention for ectopic beat identification, especially of supraventricular ectopic beats (SVE). This makes the HRV measurement in large, e.g. epidemiological studies problem...
Article
Full-text available
The stratification of post-myocardial infarction (MI) patients at risk of sudden cardiac death remains important. The aim of the present study was to assess the prognostic value of novel T-wave morphology descriptors derived from resting 12-lead ECGs. In 280 consecutive post-MI patients, a 12-lead ECG was recorded before discharge, optically scanne...
Article
QT dispersion (QTd, range of QT intervals in 12 ECG leads) is thought to reflect spatial heterogeneity of ventricular refractoriness. However, QTd may be largely due to projections of the repolarization dipole rather than "nondipolar" signals. Seventy-eight normal subjects (47+/-16 years, 23 women), 68 hypertrophic cardiomyopathy patients (HCM; 38+...
Article
Background: Heterogeneity of ventricular repolarisation is important in arrhythmogenesis. However, no information is available on the mechano-electrophysiological coupling of left ventricular (LV) function and myocardial repolarisation. Method: Ten 12-lead ECGs were recorded on each of the 69 patients (41M, age: 47.9±14.5) with idiopathic dilated c...
Article
Background: It remains unclear whether current repolarisation parameters are capable of quantifying repolarisation abnormality. We hypothesised that QTc interval, QT dispersion (QTd), principal component analysis (PCA) ratio and T wave alternans (TWA) are fundamentally different in their capabilities to quantify ventricular repolarisation. Method:...
Article
Background: Risk stratification in post-myocardial infarction patients using ECG repolarisation parameters remains unreliable in recent studies. We report the prognostic value of novel T wave morphology (TWM) descriptors from ECGs in a prospective cohort of myocardial infarction (MI) patients. Method: Ten ECGs were recorded on each of the 78 patien...
Article
The most common method of assessing the ventricular repolarisation heterogeneity has been the QT disper- sion (QTd). Although QTd was shown to be associated with heterogeneity, it does not provide a full picture and suffers from some technical drawbacks, mainly the T-end detection. Several new methods have been pro- posed as an alternative and/or a...
Article
Three new approaches for the analysis of ventricular repolarisation in 12-lead electrocardiograms (ECGs) are presented: the spatial and temporal variations in T-wave morphology and the wavefront direction difference between the ventricular depolarisation and repolarisation waves. The spatial variation characterises the morphology differences betwee...
Article
Full-text available
An orthogonalization method to eliminate unwanted signal components in standard 12-lead exercise electrocardiograms (ECG's) is presented in this work. A singular-value-decomposition-based algorithm is proposed to decompose the signal into two time-orthogonal subspaces; one containing the ECG and the other containing artifacts like baseline wander a...
Conference Paper
The detection of ventricular repolarisation abnormalities is widely being done using the QT interval measurements. However there are both technical and theoretical problems with QT measurements. We propose two robust methods for the quantification of the ventricular repolarisation abnormalities: (i) the quantification of the inter-lead morphology d...
Article
Full-text available
Fertiiizers contained main crop nutritions are commonly used for increasing the crop yields. in general, use of fertilizers are much more than crop needs so that, groundwater, streams, soil, agricultural products, and atmosphere are polluted by excess fer- tilizers. Therefore, it is essential to determine the process how the chemİcal inaterials lea...
Conference Paper
Full-text available
A new machine learning algorithm for the diagnosis of cardiac arrhythmia from standard 12 lead ECG recordings is presented. The algorithm is called VF15 for Voting Feature Intervals. VF15 is a supervised and inductive learning algorithm for inducing classification knowledge from examples. The input to VF15 is a training set of records. Each record...
Conference Paper
Full-text available
An efficient method of making use of the redundancy in standard 12 lead ECG signals to eliminate noise is described. The method is based on orthogonalization via online singular value decomposition (SVD). Its application as a filter to remove EMG noise and baseline wander are explained. A comparative study of ST analysis results of original and pro...
Article
Soil and water resources have to be used efficiently due to the having agricultural potential in Konya Basin. In this study, soil and water potential of Konya Basin, its use in agriculture and problems resulted from the agriculture and sustainability were analyzed with detail. Nowadays in such basin, some problems have observed about the sustainabl...
Article
Full-text available
This study was conducted to evaluate randomly selected 11 trickle irrigation systems, 4 in plastic greenhouses and 7 in open fields, for some vegetable plants at Konya province of Turkey. The present work covered mainly determinations of uniformity coefficient (UC), root lengths of vegetables, evaluation of working pressures of systems and also sys...
Article
In this study, available water potential, excess water use in agriculture was briefly analyzed first and then sustainability of irrigation and importance of pressurized irrigation methods for efficient water resources use were discussed in Konya basin of Turkey. Basin water resources are scant with 2.5% of total available water potential of Turkey....
Article
Full-text available
The average annual rainfall of Turkey is almost 643mm. However, it is almost 350-500mm in Central and South-East Anatolia Regions. The annual lowest rainfall occurs in Salt Lake as 250-300 mm and Karapınar Provinces of Konya in that both are arid areas of Turkey. In recently, rainfall is far from the average of long term annual meteorological recor...

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