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2015

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Articles 31 - 60 of 1139

Full-Text Articles in Physical Sciences and Mathematics

Late Pleistocene Glaciations And Paleoclimate Of Turkey, Mehmet Akif Sarikaya, Atilla Çi̇ner Dec 2015

Late Pleistocene Glaciations And Paleoclimate Of Turkey, Mehmet Akif Sarikaya, Atilla Çi̇ner

Bulletin of the Mineral Research and Exploration

Glaciers respond quickly to climatic changes and thus they are considered to be very accurate indicators of changes in atmospheric conditions. Similarly, the extent of past glaciers gives valuable insights into paleoclimatic changes. For this purpose, we reviewed the paleo-glaciated mountains where cosmogenic surface exposure dating was applied inTurkey. We also evaluated the paleoclimatic results obtained from these studies to provide a regional overview. Twenty-seven mountains in Turkey are high enough to support Quaternary valley glaciers or ice caps. The timing of glaciations was reported mainly by cosmogenic dating of moraines. We re-evaluated the dated sites and recalculated some of …

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Geological Features Of Neogene Basins Hosting Borate Deposits: An Overview Of Deposits And Future Forecast, Turkey, Cahit Helvaci Dec 2015

Geological Features Of Neogene Basins Hosting Borate Deposits: An Overview Of Deposits And Future Forecast, Turkey, Cahit Helvaci

Bulletin of the Mineral Research and Exploration

The geometry, stratigraphy, tectonics and volcanic components of the borate bearing Neogene basins in western Anatolia offer some important insights into on the relationship between basin evolution, borate formation and mode of extension in western Anatolia. Some of the borate deposits in NE-SW trending basins developed along the ‹zmir-Bal›kesir Transfer Zone (‹BTZ) (e.g. Bigadiç, Sultançay›r and Kestelek basins), and other deposits in the NE-SW trending basins which occur on the northern side of the Menderes Core Complex (MCC) are The Selendi and Emet basins. The K›rka borate deposit occurs further to the east and is located in a completely different …

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Geological Heritage And Framework List Of The Geosites In Turkey, Nizamettin Kazanci, Fuat Şaroğlu, Yaşar Suludere Dec 2015

Geological Heritage And Framework List Of The Geosites In Turkey, Nizamettin Kazanci, Fuat Şaroğlu, Yaşar Suludere

Bulletin of the Mineral Research and Exploration

Geosites and the special type of geosite called geological heritage are tangible materials such as rocks, fossils, minerals, sedimentary sequences, or structures about which there are results and/or documents of significant events in the geological history. A Framework List deciphers the geological events of the past without mentioning the localities or results. Ideally, there is only one Framework List for every country. The Framework List for Turkey proposed by this study includes 85 titles (frame) in 10 categories. The Stratigraphic and Volcanic-Metamorphic-Sedimentary Petrology categories are the richest for the Frameworks; however they two already contain the majority of the geosites …

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Late Permian Unconformity Around Ankara And New Age Data On The Basement Rocks, Ankara, Turkey, Mustafa Sevi̇n, Mustafa Dönmez, Gökhan Atici, Ender Sarifakioğlu, Serap Durmaz Arikan, Aysel Esatoğlu Vekli̇, Havva Soycan Dec 2015

Late Permian Unconformity Around Ankara And New Age Data On The Basement Rocks, Ankara, Turkey, Mustafa Sevi̇n, Mustafa Dönmez, Gökhan Atici, Ender Sarifakioğlu, Serap Durmaz Arikan, Aysel Esatoğlu Vekli̇, Havva Soycan

Bulletin of the Mineral Research and Exploration

At southwest of Gölbafl› (Ankara) there are two different sequences in tectonic contact. The one at the bottom with low-degree metamorphism is represented by phyllite, metabasite, crystallized limestone, schist and quartz porphyry veins. Above them are early Carboniferous-late Permian neritic and pelagic carbonates which are unconformably overlain by late Permian clastics and carbonates. Samples collected from neritic carbonates yielded early Carboniferous (Visian-Serpuhovian) to middle Carboniferous (Bashkirian- Moskovian) ages. These carbonates of shallow facies character are overlain by radiolarite-bearing pelagic deposits of middle Carboniferous-Permian age. Fossils from the upper most neritic carbonates gave Kubergandian-Murgabian age. This PermoCarboniferous sequence is unconformably overlain …

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Archaeological And Geological Concepts On The Topic Of Ancient Mining, Prentiss De Jesus, Gonca Dardeni̇z Dec 2015

Archaeological And Geological Concepts On The Topic Of Ancient Mining, Prentiss De Jesus, Gonca Dardeni̇z

Bulletin of the Mineral Research and Exploration

Geological and archaeological research on ancient mining and metallurgy are actually targeting the same goals: understanding the nature and value of a mining operation. Geologists are intent on locating and qualifying ores and minerals for future use, whereas archaeologists strive to link ores to relevant historic and prehistoric metal artifacts and activities. This article discusses research into ancient Anatolian metallurgy by underscoring the overlap between geological and archeological practices. The work of archaeologists and geologists can be mutually beneficial through a close collaboration on the collection and analysis of field data. Their accumulated and combined knowledge would accelerate the progress …

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Evaluation Of Asbestos Exposure In Dumanli Village (Çanakkale-Turkey) From A Medical Geology Viewpoint: An Inter-Disciplinary Study, Erdinç Yi̇ği̇tbaş, Arzu Mi̇ri̇ci̇, Uğur Gönlügür, Coşkun Bakar, İsmail Onur Tunç, Fırat Şengün, Özgür Işikoğlu Dec 2015

Evaluation Of Asbestos Exposure In Dumanli Village (Çanakkale-Turkey) From A Medical Geology Viewpoint: An Inter-Disciplinary Study, Erdinç Yi̇ği̇tbaş, Arzu Mi̇ri̇ci̇, Uğur Gönlügür, Coşkun Bakar, İsmail Onur Tunç, Fırat Şengün, Özgür Işikoğlu

Bulletin of the Mineral Research and Exploration

Biga Peninsula has many varied and interesting medical geologic problems, as well as being rich in natural geological resources. Mainly these problems are natural radioactivity, mineral dust, metal/mineral contamination in drinking water, acid rock/mine drainage, and problems related to geothermal and drinking water. With this view exposure to asbestos was surveyed and the results of this survey were evaluated by earth scientists and medical doctors. This inter-disciplinary study was done in Dumanl› village (Çanakkale-Turkey) in the Biga Peninsula, NW Turkey. Studies have been carried out in earth sciences and the health sciences simultaneously. The asbestiform minerals around Dumanl› village are …

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The Late Quaternary Tectono-Stratigraphic Evolution Of The Lake Van, Turkey, Naci Görür, M. Namık Çağatay, Cengiz Zabci, Mehmet Sakinç, Remzi Akkök, Hande Şi̇le, Sefer Örçen Dec 2015

The Late Quaternary Tectono-Stratigraphic Evolution Of The Lake Van, Turkey, Naci Görür, M. Namık Çağatay, Cengiz Zabci, Mehmet Sakinç, Remzi Akkök, Hande Şi̇le, Sefer Örçen

Bulletin of the Mineral Research and Exploration

No abstract provided.

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Review Of The Occurrence Of Two New Minerals In The Emet Borate Deposit, Turkey: Emetite, Ca7na3k(So4)9, And Fontarnauite, Na2sr(So4)[B5o8(Oh)](H2o)2, Cahit Helvaci̇ Dec 2015

Review Of The Occurrence Of Two New Minerals In The Emet Borate Deposit, Turkey: Emetite, Ca7na3k(So4)9, And Fontarnauite, Na2sr(So4)[B5o8(Oh)](H2o)2, Cahit Helvaci̇

Bulletin of the Mineral Research and Exploration

No abstract provided.

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Vertical And Horizantal Analysis Of Crustal Structure In Eastern Anatolia Region, Oya Pamukçu, Tolga Gönenç, Ayça Yurdakul Çirmik, Şevket Demi̇rbaş, Seyit Tosun Dec 2015

Vertical And Horizantal Analysis Of Crustal Structure In Eastern Anatolia Region, Oya Pamukçu, Tolga Gönenç, Ayça Yurdakul Çirmik, Şevket Demi̇rbaş, Seyit Tosun

Bulletin of the Mineral Research and Exploration

The tectonic regime of Eastern Anatolia is determined by Arabian-Eurasian continentcontinent convergence and the mechanism occurred with the convergence. North Anatolian Fault Zone (NAFZ), Eastern Anatolian Fault Zone (EAFZ), North Eastern Anatolian Faults and Bitlis Zagros Suture Zone are formed by this convergence, represent the characteristic of lithospheric structure of the region. In the scope of this study, the gravity anomalies of Eastern Anatolia were used for investigating the lithospheric structure. Firstly, second order trend analyses were applied to gravity data for examining the characteristic of the anomaly. Later, the vertical and horizontal derivatives methods were applied to the same …

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Data To Decisions For Cyberspace Operations, Steve Stone Dec 2015

Data To Decisions For Cyberspace Operations, Steve Stone

Military Cyber Affairs

In 2011, the United States (U.S.) Department of Defense (DOD) named cyberspace a new operational domain. The U.S. Cyber Command and the Military Services are working to make the cyberspace environment a suitable place for achieving national objectives and enabling military command and control (C2). To effectively conduct cyberspace operations, DOD requires data and analysis of the Mission, Network, and Adversary. However, the DOD’s current data processing and analysis capabilities do not meet mission needs within critical operational timelines. This paper presents a summary of the data processing and analytics necessary to effectively conduct cyberspace operations.

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Describing Images Using A Multilayer Framework Based On Qualitative Spatial Models, Tao Wang, Hui Shi Dec 2015

Describing Images Using A Multilayer Framework Based On Qualitative Spatial Models, Tao Wang, Hui Shi

Baltic International Yearbook of Cognition, Logic and Communication

To date most research in image processing has been based on quantitative representations of image features using pixel values, however, humans often use abstract and semantic knowledge to describe and analyze images. To enhance cognitive adequacy and tractability, we here present a multilayer framework based on qualitative spatial models. The layout features of segmented images are defined by qualitative spatial models which we introduce, and represented as a set of qualitative spatial constraints. Assigned different semantic and context knowledge, the image segments and the qualitative spatial constraints are interpreted from different perspectives. Finally, the knowledge layer of the framework enables …

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The Genesis Of A Lava Cave In The Deccan Volcanic Province (Maharashtra, India), Nikhil R. Pawar, Amod H. Katikar, Sudha Vaddadi, Sumitra H. Shinde, Sharad N. Rajaguru, Sachin V. Joshi, Sanjay P. Eksambekar Dec 2015

The Genesis Of A Lava Cave In The Deccan Volcanic Province (Maharashtra, India), Nikhil R. Pawar, Amod H. Katikar, Sudha Vaddadi, Sumitra H. Shinde, Sharad N. Rajaguru, Sachin V. Joshi, Sanjay P. Eksambekar

International Journal of Speleology

Lava tubes and channels forming lava distributaries have been recognized from different parts of western Deccan Volcanic Province (DVP). Openings of smaller dimension have been documented from the pāhoehoe flows around Pune, in the western DVP. A small lava cave is exposed in Ghoradeshwar hill, near Pune. Detailed field studies of the physical characteristics, structure and morphology of the flows hosting the lava tube has been carried out. This is the first detailed documentation of a lava cave from the DVP. The lava cave occurs in a compound pāhoehoe flow of Karla Formation, characterized by the presence of lobes, toes …

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Award To David Wuolu Dec 2015

Award To David Wuolu

The Compass: Earth Science Journal of Sigma Gamma Epsilon

No abstract provided.

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First Occurrence Of Lithostrotion (Diphyphyllum) From The Mississippian Redwall Limestone In The Beaver Dam Mountains, Washington County, Utah, Devin M. Mclemore, Jennifer E. Hargrave Dec 2015

First Occurrence Of Lithostrotion (Diphyphyllum) From The Mississippian Redwall Limestone In The Beaver Dam Mountains, Washington County, Utah, Devin M. Mclemore, Jennifer E. Hargrave

The Compass: Earth Science Journal of Sigma Gamma Epsilon

The Paleozoic stratigraphy of the Beaver Dam Mountains of southwestern Utah correlates well with the better known deposits of the Grand Canyon, Arizona. However, a detailed list of the fossil fauna from the Beaver Dam Mountains is lacking. Here we describe a rugose coral from the Mississippian Redwall Limestone from Washington Country, Utah. The rugose coral is highly recrystallized, but identified as Lithostrotion (Diphyphyllum) based on morphology and geographic extent. An analysis was conducted to determine conodont zonation, but proved inconclusive. This is the first documented case of Lithostrotion (Diphyphyllum) from the Beaver Dam Mountains.

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Pennsylvanian Stratigraphy Of Douglas County, Kansas: Glacioeustatically Modulated Cyclic Deposition On A Remarkably Smooth Shelf, Anthony W. Walton Dec 2015

Pennsylvanian Stratigraphy Of Douglas County, Kansas: Glacioeustatically Modulated Cyclic Deposition On A Remarkably Smooth Shelf, Anthony W. Walton

The Compass: Earth Science Journal of Sigma Gamma Epsilon

The Middle and Late Pennsylvanian succession of Kansas consists of two types of cyclothems, lithologic successions that consist of several members that repeat in a particular order. Cyclothems are a few meters to a few tens of meters thick. One type of cyclothem, the Kansas cyclothem, or here the limestone-rich cyclothem, consists of interbeds of limestone and shale, where the amounts of limestone are approximately equal to the amount of shale or dominate the succession. This trip will study one such cyclothem in the Oread Limestone at Stop 3 and possibly another cyclothem at the optional Stop 4. Siliciclastic cyclothems …

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Minerva 2015, The Honors College Dec 2015

Minerva 2015, The Honors College

Minerva

This issue of Minerva includes an interview with Honors alumnus and Nobel Peace Prize winner, Bernard Lown; a celebration of retiring Assistant Dean, Barbara Ouellette; and memorial articles celebrating the lives of notable Honors supporters, Betsy Leitch and Dennis Rezendes. Other highlights include a spread on Honors student travel and community engagement; and an article on Honors graduate, Jill Pelto, whose artwork graces the front and back covers of the 2015 Minerva.

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Approximate Solutions For The Flow And Heat Transfer Due To A Stretching Sheet Embedded In A Porous Medium With Variable Thickness, Variable Thermal Conductivity And Thermal Radiation Using Laguerre Collocation Method, M. M. Khader, Ahmed M. Megahed Dec 2015

Approximate Solutions For The Flow And Heat Transfer Due To A Stretching Sheet Embedded In A Porous Medium With Variable Thickness, Variable Thermal Conductivity And Thermal Radiation Using Laguerre Collocation Method, M. M. Khader, Ahmed M. Megahed

Applications and Applied Mathematics: An International Journal (AAM)

In this article, a numerical approach is given for studying the flow of a Newtonian fluid over an impermeable stretching sheet embedded in a porous medium with a power law surface velocity and variable thickness in the presence of thermal radiation. The flow is caused by a non-linear stretching of a sheet. Thermal conductivity of the fluid is assumed to vary linearly with temperature. The governing PDEs are transformed into a system of coupled non-linear ODEs which are using appropriate boundary conditions for various physical parameters. The proposed method is based on replacement of the unknown function by truncated series …

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Kaluza-Klein Type Cosmological Model Of The Universe With Inhomogeneous Equation Of State, G. S. Khadekar, Rajani Shelote Dec 2015

Kaluza-Klein Type Cosmological Model Of The Universe With Inhomogeneous Equation Of State, G. S. Khadekar, Rajani Shelote

Applications and Applied Mathematics: An International Journal (AAM)

In this paper we study Kaluza-Klein type cosmological model of the universe filled with an ideal fluid obeying an inhomogeneous equation of state depending on time. It is shown that there appears a quasi-periodic universe, which repeats the cycles of phantom type space acceleration.

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Solving A Class Of Linear Skorokhod Stochastic Differential Equations, Karl-Heinz Fichtner, Steffen Klaere, Volkmar Liebscher Dec 2015

Solving A Class Of Linear Skorokhod Stochastic Differential Equations, Karl-Heinz Fichtner, Steffen Klaere, Volkmar Liebscher

Communications on Stochastic Analysis

No abstract provided.

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Two-Dimensional 1-Meixner Random Vectors And Their Semi-Quantum Operators, Gabriela Popa, Aurel I Stan Dec 2015

Two-Dimensional 1-Meixner Random Vectors And Their Semi-Quantum Operators, Gabriela Popa, Aurel I Stan

Communications on Stochastic Analysis

No abstract provided.

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A Poisson Shot-Noise Process Of Pulses And Its Scaling Limits, Mine Çaglar Dec 2015

A Poisson Shot-Noise Process Of Pulses And Its Scaling Limits, Mine Çaglar

Communications on Stochastic Analysis

No abstract provided.

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On The Lévy-Khinchin Decomposition Of Generating Functionals, Uwe Franz, Malte Gerhold, Andreas Thom Dec 2015

On The Lévy-Khinchin Decomposition Of Generating Functionals, Uwe Franz, Malte Gerhold, Andreas Thom

Communications on Stochastic Analysis

No abstract provided.

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Doob's Decomposition Theorem For Near-Submartingales, Hui-Hsiung Kuo, Kimiaki Saitô Dec 2015

Doob's Decomposition Theorem For Near-Submartingales, Hui-Hsiung Kuo, Kimiaki Saitô

Communications on Stochastic Analysis

No abstract provided.

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Large Deviations For Stochastic Tidal Dynamics Equation, Murugan Suvinthra, Sivaguru S Sritharan, Krishnan Balachandran Dec 2015

Large Deviations For Stochastic Tidal Dynamics Equation, Murugan Suvinthra, Sivaguru S Sritharan, Krishnan Balachandran

Communications on Stochastic Analysis

No abstract provided.

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White Noise Analysis For The Canonical Lévy Process, Rolando D Navarro Jr., Frederi G Viens Dec 2015

White Noise Analysis For The Canonical Lévy Process, Rolando D Navarro Jr., Frederi G Viens

Communications on Stochastic Analysis

No abstract provided.

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Krylov-Veretennikov Formula For Functionals From The Stopped Wiener Process, Georgii V Riabov Dec 2015

Krylov-Veretennikov Formula For Functionals From The Stopped Wiener Process, Georgii V Riabov

Communications on Stochastic Analysis

No abstract provided.

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An M/G/1 Queue With Server Breakdown And Multiple Working Vavation, S. P. Bala Murugan, K. Santhi Dec 2015

An M/G/1 Queue With Server Breakdown And Multiple Working Vavation, S. P. Bala Murugan, K. Santhi

Applications and Applied Mathematics: An International Journal (AAM)

This paper deals with the steady state behavior of an M=G=1 multiple working vacation queue with server breakdown. The server works with different service times rather than completely stopping service during a vacation. Both service times in a vacation period and in a regular service period are assumed to be generally distributed random variables. The system may breakdown at random and repair time is arbitrary. Further, just after completion of a customer’s service the server may take a multiple working vacation. Supplementary variable technique is employed to find the probability generating function for the number of customers in the system. …

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Exact Implicit Solution Of Nonlinear Heat Transfer In Rectangular Straight Fin Using Symmetry Reduction Methods, M. S. Abdel Latif, A. H. Abdel Kader, H. M. Nour Dec 2015

Exact Implicit Solution Of Nonlinear Heat Transfer In Rectangular Straight Fin Using Symmetry Reduction Methods, M. S. Abdel Latif, A. H. Abdel Kader, H. M. Nour

Applications and Applied Mathematics: An International Journal (AAM)

In this paper, the exact implicit solution of the second order nonlinear ordinary differential equation which governing heat transfer in rectangular fin is obtained using symmetry reduction methods. General relationship among the temperature at the fin tip, the temperature gradient at the fin base, the mode of heat transfer, 𝑛 and the fin parameters 𝑁 and ℰ is obtained. Some numerical examples are discussed and it is shown that the temperature of fin increases when approaching from the heat source. The relationship between the fin efficiency and the temperature of fin tip is obtained for any value of the mode …

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Laminar Boundary Layer Flow Of Sisko Fluid, Manisha Patel, Jayshri Patel, M. G. Timol Dec 2015

Laminar Boundary Layer Flow Of Sisko Fluid, Manisha Patel, Jayshri Patel, M. G. Timol

Applications and Applied Mathematics: An International Journal (AAM)

The problem of steady two dimensional laminar boundary layer flow of non-Newtonian fluid is analyzed in the present paper. Sisko fluid model, one of the various fluid models of non- Newtonian fluid, is considered for stress-strain relationship. Similarity and numerical solutions obtained for the defined flow problem.

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F–Geometric Mean Graphs, A. D. Baskar, S. Arockiaraj Dec 2015

F–Geometric Mean Graphs, A. D. Baskar, S. Arockiaraj

Applications and Applied Mathematics: An International Journal (AAM)

In a study of traffic, the labelling problems in graph theory can be used by considering the crowd at every junction as the weights of a vertex and expected average traffic in each street as the weight of the corresponding edge. If we assume the expected traffic at each street as the arithmetic mean of the weight of the end vertices, that causes mean labelling of the graph. When we consider a geometric mean instead of arithmetic mean in a large population of a city, the rate of growth of traffic in each street will be more accurate. The geometric …

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