Dužinsko-maseni odnos 47 ribljih vrsta iz Izmirskog zaljeva (istočni dio Egejskog mora, Turska)

Length-weight relationships were calculated for 47 fish species from the Izmir Bay in the Aegean Sea, Turkey. A total of 13243 fish specimens were sampled with several fishing gears in 1998-2001. The sample size ranged from 11 individuals for Nerophis ophidion to 1197 for Boops boops. The r2 values ranged from 0.82 for Nerophis ophidion to 0.99 for Scorpaena scrofa, and all regressions were highly significant (p<0.001). Values of the exponent b in the length-weight regression (W = aLb) ranged 1.970-3.727. The median was 3.042 and over 50% of the values were within 2.937- 3.186. Information from the present survey may be used for fisheries management or other practical purposes.Istraživan je dužinsko-maseni odnos za 47 vrsta u Egejskom moru (Izmirski zaljev). Ukupno je obrađeno 13243 jedinki uzorkovanim s nekoliko različitih ribarstvenih alata u razdoblju od 1998. do 2001. godine. Broj jedinki kolebao je od 11 za šilce gretenkljuno Nerophis ophidian do 1197 za bukvu, Boops boops. Vrijednosti koeficijenta determinacije r2 su kolebale u rasponu od 0.82 za šilce gretenkljuno N. ophidian do 0.99 za škrpinu, Scorpaena scrofa, dok su regresije bile statistički vrlo značajne (P<0.001). Vrijednosti eksponenata b kod dužinsko-masenih odnosa (W = aLb) su kolebale između 1.970-3.727. Srednja vrijednost je iznosila 3.042, dok se 50% svih vrijednosti kretalo u rasponu između 2.937 i 3.186. Dobiveni podatci iz ove studije mogu poslužiti svsishodno za potrebe gospodarenja ribljim bogatstvima kao i za neke druge praktične primjene

Dužinsko-maseni odnos 47 ribljih vrsta iz Izmirskog zaljeva (istočni dio Egejskog mora, Turska)

Length-weight relationships were calculated for 47 fish species from the Izmir Bay in the Aegean Sea, Turkey. A total of 13243 fish specimens were sampled with several fishing gears in 1998-2001. The sample size ranged from 11 individuals for Nerophis ophidion to 1197 for Boops boops. The r2 values ranged from 0.82 for Nerophis ophidion to 0.99 for Scorpaena scrofa, and all regressions were highly significant (p<0.001). Values of the exponent b in the length-weight regression (W = aLb) ranged 1.970-3.727. The median was 3.042 and over 50% of the values were within 2.937- 3.186. Information from the present survey may be used for fisheries management or other practical purposes.Istraživan je dužinsko-maseni odnos za 47 vrsta u Egejskom moru (Izmirski zaljev). Ukupno je obrađeno 13243 jedinki uzorkovanim s nekoliko različitih ribarstvenih alata u razdoblju od 1998. do 2001. godine. Broj jedinki kolebao je od 11 za šilce gretenkljuno Nerophis ophidian do 1197 za bukvu, Boops boops. Vrijednosti koeficijenta determinacije r2 su kolebale u rasponu od 0.82 za šilce gretenkljuno N. ophidian do 0.99 za škrpinu, Scorpaena scrofa, dok su regresije bile statistički vrlo značajne (P<0.001). Vrijednosti eksponenata b kod dužinsko-masenih odnosa (W = aLb) su kolebale između 1.970-3.727. Srednja vrijednost je iznosila 3.042, dok se 50% svih vrijednosti kretalo u rasponu između 2.937 i 3.186. Dobiveni podatci iz ove studije mogu poslužiti svsishodno za potrebe gospodarenja ribljim bogatstvima kao i za neke druge praktične primjene

Investigation of Electrical Properties of Au/Organometallic Complex/nSi MIS Structure at Low Temperatures

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A Tverberg type theorem for matroids

Let b(M) denote the maximal number of disjoint bases in a matroid M. It is shown that if M is a matroid of rank d+1, then for any continuous map f from the matroidal complex M into the d-dimensional Euclidean space there exist t \geq \sqrt{b(M)}/4 disjoint independent sets \sigma_1,\ldots,\sigma_t \in M such that \bigcap_{i=1}^t f(\sigma_i) \neq \emptyset.Comment: This article is due to be published in the collection of papers "A Journey through Discrete Mathematics. A Tribute to Jiri Matousek" edited by Martin Loebl, Jaroslav Nesetril and Robin Thomas, due to be published by Springe

İstanbul`da itfaiye istasyonu yerlerinin seçimi için yeni bir model - Fire station location selection for Istanbul

This Article is in Turkish and can be accessed from the link below.Özellikle acil hizmetler veren polis, hastane, itfaiye gibi kurumlar için yer seçimi büyük önem taşımaktadır. Uygun bir yer seçimi gerçekleştirilmediği takdirde bunun sonuçları insan hayatını tehlikeye atabilir niteliktedir. İstanbul gibi büyük metropollerde, artan nüfus ve trafik yoğunluğunun yanı sıra bir de metropolün deprem kuşağında olması durumunda, itfaiye araçlarının olay yerine en hızlı şekilde ulaşması hayati önem taşımakta; bu da itfaiye istasyonu yerinin etkin seçimine kritik bir rol yüklemektedir. Bu çalışma; İstanbul Büyükşehir Belediyesi tarafından kararlaştırıldığı gibi, itfaiye teşkilatının her bölgeye en çok beş dakikada erişebilmesi ve kapsama alanının %100 olması hedeflenerek yeni kurulacak olan itfaiye istasyonlarının küme kapsama modeli yardımıyla konumlandırılmasını içermektedir. Bu amaçla bir tamsayı programlama modeli kurulmuş, coğrafi bilgi sistemlerinden elde edilen verilerle model çözülmüş, seçilen yerler için itfaiye kurulması durumunda yangın hizmet düzeyinin değişimi incelenmiştir. - For emergency services such as ambulance systems and fire departments, location selection plays a critical role due to the direct impact of these services on human lives. Timeliness plays a primary role in location selection decision of fire stations for large metropolitan cities such as Istanbul with increasing population with a high level of congestion coupled with an imminent earthquake risk. This study is based on a set-covering model for locating new fire stations, which target to serve each area at most in five minutes and improve their coverage area to 100% for Istanbul Municipality Fire Department. Accordingly, a set-covering model is built and solved using the data retrieved from geographical information systems. Finally the change in service level with proposed fire station locations is investigated and further suggestions are provided

Probing the Southern African Lithosphere With Magnetotellurics-Part I: Model Construction

The Southern African Magnetotelluric Experiment (SAMTEX) involved the collection of data at over 700 sites in Archean to Proterozoic southern Africa, spanning features including the Kalahari Craton, Bushveld Complex, and voluminous kimberlites. Here, we present the first 3D inversions of the full SAMTEX data set. In this paper, we focus on assessing the robustness of the 3D models by comparing two different inversion codes, jif3D and ModEM, and two different subsets of the data, one containing all acceptable data and the other containing a smaller selection of undistorted, high-quality data. Results show that the main conductive and resistive features are imaged by all inversions, including deep resistive features in the central Kaapvaal Craton and southern Congo Craton and a lithospheric-scale conductor beneath the Bushveld Complex. Despite this, differences exist between the jif3D and ModEM inverse models that derive mainly from the differences in regularization between the models, with jif3D producing models that are very smooth laterally and with depth, while ModEM produces models with more discrete conductive and resistive features. Analysis of the differences between these two inversions can provide a good indication of the model resolution. More minor differences are apparent between models run with different subsets of data, with the models containing all acceptable data featuring higher wavelength conductivity variations than those run with fewer stations but also demonstrating poorer data fit

Dinamika populacije mediteranskog zelenog raka Carcinus aestuarii Nardo, 1847. (Crustacea: Portunidae)u delti rijeke Gediz (zaljev Izmir, Istočno Egejsko more)

A total of 6265 Mediterranean green crabs Carcinus aestuarii were sampled from the Gediz Delta in the eastern Aegean Sea (Turkey) during 24 sampling surveys with a 15-day interval from November 2014 to October 2015. The overall ratio of males to females was 1.8:1. Males were predominant in all sampling surveys, except in September 2015. The ranges of total weight (W) and carapace width (CW) for all crabs were 0.19–45.74 g and 8–53 mm. Male crabs were, on average, larger and heavier than females. The W–CW relationships were (W=0.0004×CW^{2.88}) for females, and (W=0.0003×CW^{2.96}) for males. The estimated von Bertalanffy growth parameters for females were: CW∞=49 mm, (K=0.82 year^{-1}) and (t_{0} =-0.9 year), and for males (CW_{∞} = 54 mm), (K=0.92 year^{-1}) and year. The total mortality rates were 2.25 and 2.27 year-1 for females and (t_{0} = -0,96) males, respectively. The breeding season spans from mid fall to early spring peaking in winter. The recruitment of juveniles to the lagoon happens predominantly in summer. The median size at first maturity was 30.6 mm for females and 41.5 mm for males. The average potential fecundity estimate was 63565±36519 oocytes per female crab while the average realized fecundity was 42810±33310 eggs.Sakupljeno je 6265 jedinki mediteranskog zelenog raka Carcinus aestuarii iz delte rijeke Gediz u istočnom Egejskom moru (Turska) tijekom 24 ispitivanja uzoraka u intervalima od 15 dana od studenog 2014. do listopada 2015. godine. Ukupni omjer mužjaka i ženki iznosio je 1:8. Mužjaci su bili prevladavajući u svim istraživanjima uzoraka, osim u rujnu 2015. Rasponi ukupne mase (W) i širine glavopršnjaka (CW) za sve rakove iznosili su 0,19–45,74 g i 8–53 mm. Mužjaci su bili u prosjeku veći i teži od ženki. Odnosi ukupne težine i širine glavopršnjaka su iznosili (W = 0,0004 × CW^{2,88}) za ženke, a (W = 0,0003 × CW^{2,96}) za mužjake. Procijenjeni parametri rasta ženki prema von Bertalanffy-jevoj jednadžbi iznosili su: (CW_{∞}) gdje je = 49 mm, (K = 0,82 godina^{-1}) i (t_{0 = -0,9}) godina, a za mužjake (CW_{∞} = 54 mm), (K = 0,92 godina ^{-1}) i (t_{0} = -0,96) godina. Ukupna smrtnost ženki iznosila je (2,25 godina^-1) dok je za mužjake iznosila (2,27 godina^{-1}). Razdoblje razmnožavanja seže od sredine jeseni do ranog proljeća, te dostiže vrhunac zimi. Novačenje mlađi u laguni se pretežito odvija u ljetnom periodu. Srednja veličina jedinki pri prvoj spolnoj zrelosti bila je 30,6 mm za žene i 41,5 mm za mužjake. Prosječna potencijalna procjena plodnosti iznosila je 63565 ± 36519 oocita po ženki rakova, dok je prosječna ostvarena plodnost iznosila 42810 ± 33310 jajašaca

Analyzing competitiveness of automotive industry through cumulative belief degrees

Ülengin, Füsun (Dogus Author) -- Önsel, Şule (Dogus Author) -- Kabak, Özgür (Dogus Author) -- Conference full title: 10th International Fuzzy Logic and Intelligent Technologies inNuclear Science Conference, FLINS 2012; Istanbul; Turkey; 26 August 2012 through 29 August 2012This study aims to analyze the automotive industry from competitiveness perspective using a novel cumulative belief degrees (CBD) approach. For this purpose, a mathematical model based on CBD is proposed to quantify the relations among the variables in a system. This model is used to analyze the Turkish Automotive Industry through scenario analysis.SEDEFED (Federation of Industrial Associations), REF (TÜSİAD Sabanci University Competitiveness Forum), and OSD (Automotive Manufacturers Association