Physical Sciences and Mathematics Commons^™

Will Lee-Side Cyclones Become More Intense In A Warming Climate?, Samuel Scoleri

Ursidae: The Undergraduate Research Journal at the University of Northern Colorado

The generation of lee-side low pressure systems, or lee-side cyclogenesis, commonly occurs in areas downwind of mountain ranges, such as eastern Colorado. Cyclones that form east of the Rockies tend to evolve into larger storm systems that travel eastward into the Great Plains region. Previous studies have found that diabatic heating, such as heat radiating away from Earth’s surface, has the ability to affect developing cyclones. The International Panel on Climate Change (IPCC) has reported that future climate scenarios all indicate an increase in surface temperature, which could prove to impact lee-side cyclogenesis. The purpose of my research is to …

Note From The Editorial Board

Dartmouth Undergraduate Journal of Science

No abstract provided.

Movement I From Lamentationes, Timothy W. Mcdunn

CrissCross

This piece is a setting of the first poem in the book of ʼêḵāh from the Hebrew Bible (the book of Lamentations in the Christian Old Testament). Setting the text in its original language has had two primary advantages: (1) it preserved euphony and other poetic subtleties and (2) it left the poetry's original cultural context intact.

I use harmonic rhetoric to imitate several features of the text. One of them is the so-called "tragic reversal," a device illustrated by the lines cited above, where a reversal of fortune is expressed through the contrast between the first colon and the …

Molluscan Bi̇ostrati̇graphy Of Early Mi̇ocene Deposi̇ts Of The Kale-Tavas And Acipayam Basi̇ns (Deni̇zli̇, Sw Turkey), Yesim Buyukmeri̇c

Bulletin of the Mineral Research and Exploration

In the present work, a stratigraphic framework of the early Miocene units of the Kale-Tavas and Acıpayam deposits is proposed.Two stratigraphic sections from the brackish-marine deposits of Aquitanian (Yenidere formation) and three sections from the shallow marine units of late Burdigalian (Kale formation) age have been logged. In total 26 mollusc species are identified similar to those of the areas in the Mediterranean province. The fauna indicates that the Mediterranean Tethys occupied the southwestern part of the Denizli region only during the early Miocene. A tectonic pulse in the basin during the early Miocene may have been very important to …

Molluscan Assemblage And Paleoecology Of Lower Miocene Sequences Of The Munzur Mountains (Eastern Anatolia, Turkey), Müjde Gürsoy

Bulletin of the Mineral Research and Exploration

The research subject is the Miocene aged units that located in the Munzur Mountains at the Ovacik district of Tunceli province. There is a continued sediment deposits from Paleozoic to Cenozoic at the Munzur Mountains. The neritic limestones of the Miocene Başpınar Formation outcropping in the Ovacık district are rich in fossil groups of gastropods and bivalves. In this study, 336 samples from the Başpınar Formation have been evaluated. Seven species of Gastropoda (Globularia carlei, Granulolabium plicatum, Granulolabium (Tiaracerithium) thiarella, Tympanotonus margaritaceus, Terebralia subcorrugata, Nassarius erunalae, Cerithium vulgatum,) and four species of Bivalvia (Cardita rusticana, Anadara aquitanica, Cubitostrea digitalina, Ostrea …

The Geological Evolution Of Sorgun (Yozgat)-Yildizeli̇ (Si̇vas) Foreland Basin, Petrographic, Geochemical Aspects And Geochronology Of Volcanism Affecting The Basin, Ali Ekber Akçay, Metin Beyazpi̇ri̇nç

Bulletin of the Mineral Research and Exploration

Sorgun-Yıldızeli basin is an east-west trending asymmetric marginal foreland (peripheral foreland basin) formed as a result of the consumption of oceanic crust of the northern branch of Neotethys due to the collision of Sakarya continent in the north and Kırşehir Block in the south. It provides much information about the geodynamic evolution of the region. The basement of the study area consists of Late Palaeozoic-Mesozoic Akdağmadeni Massif. Akdağmadeni Massif was intruded by Cenomanian-Maastrichtian granitoids and is overlain tectonically by Late Cretaceous Artovaophiolitic melange within the İzmir-Ankara-Erzincan suture zone and by Cenomanian-Maastrichtian Darmik Formation. The volcano-sedimentary sequence deposited in Sorgun-Yıldızeli foreland …

When Did The Plate Tectonics Begin? The Inception Of Plate Tectonics Based On The Existence Of Komatiites And Their Mgo Variations, Anıl Ardahanlioğlu, Efe Demi̇rci̇

Bulletin of the Mineral Research and Exploration

The geoscientists have always wondered what evolutionary processes the Early Earth went through until it reached today. The beginning of the plate tectonics poses another matter of debate in these processes. Yet, the debates on when the plate tectonics began have not been resolved. In this sense, especially the lack of records regarding the period of time before the Cambrian Era is considered the biggest obstacle against resolution of these debates. The geoscientists have befitted from various methods to come up with different proposals about the beginning of the plate tectonics. The most notable rock type among the ones produced …

Whole Rock Geochemistry And Tectonic Setting Of Jurassic Aged Lisar Granite, Talesh Mountains, North Iran, Mohssen Moazzen, Roghieh Bozorg Seghi̇nsara, Hossein Shei̇khi̇ Kari̇zaki̇, Mohsen Pourkermani̇, Afshin Ashja Ardalan

Bulletin of the Mineral Research and Exploration

The Late Jurassic aged Lisar granite in North Iran is in tectonic contact of the form of thrust and strike slip faults with Upper Cretaceous sandy limestone and is covered by Paleogene polygenetic conglomerate in the Talesh Mountain at the western continuation of the Alborz range. The rock samples of the granite are pink coloured and coarse-gained with K-feldspar, quartz, plagioclase, biotite and amphibole. The Lisar granite is more likely emplaced in an extensional environment indicated with numerous space filling silica-rich aplitic veins in the rocks. The granite samples are moderately altered and feldspars are changed to sericite and clay …

Application Of Tilt Angle Method To The Bouguer Gravity Data Of Western Anatolia, Fikret Doğru, Oya Pamukçu, İlkin Özsöz

Bulletin of the Mineral Research and Exploration

In this study, tilt angle method was applied to Western Anatolia gravity data in order to estimate edges of the geological structures. Tilt angle was obtained in two different ways by using gravity and its vertical derivative. In potential field methods, tilt angle technique is expressed as the ratio of vertical derivative to horizontal derivatives of anomaly. In the tilt angle map, 0° contours defines structure edges, half of the distance between ±45° defines depth of upper structure. In the field work of the study, gravity data, which was measured in Western Anatolia, was used to obtain regional anomaly maps …

Determination Of Hydrologic Characteristics Of Si̇nop Demi̇rci̇köy Watershed And Production Of Monthly Saturation Degree Maps, Mustafa Can Canoğlu

Bulletin of the Mineral Research and Exploration

The aim of this study is to determine the hydrologic characteristics and to analyze the temporal saturation degree variations of Demirciköy Watershed which is located in Sinop City and subjected to rapidly increasing population. This study is important in terms of preventing the natural disasters such as flood, storm water, landslide and mitigation of damages within the frame of watershed planning concept. This study consists of field, office and laboratory stages. In context of field studies, representative soil samples are taken from study area. Within the scope of laboratory studies, soil hydrologic properties are characterized with the determination of soil …

A Comparative Analysis Of Index Overlay And Topsis (Based On Ahp Weight) For Iron Skarn Mineral Prospectivity Mapping, A Case Study In Sarvian Area, Markazi Province, Iran, Faranak Fei̇zi̇, Edris Mansouri̇, Ali Reza Jafari̇ Rad, Mehran Ari̇an

Bulletin of the Mineral Research and Exploration

The aim of this research is to compare index overlay and TOPSIS (based on AHP weight) for predictive Skarn potential map. In this paper, for Calcic Iron Skarn mineralization, criteria and subcriteria introduced and ranked for generating mineral prospectivity map. The values of final prospecting maps for Skarn deposit by index overlay and TOPSIS methods was specified by dividing the prospectivity values into 10 classes. For better comparison,values assign to classes base on their priority in mineral exploration. The comparative analyses of index overlay and TOPSIS integration methods, has been performed by selecting four GCPs for field checking. Field observation …

29 November 1795 Kahramanmaraş Earthquake, Southern Turkey, Mahmut Palutoğlu, Ahmet Şaşmaz

Bulletin of the Mineral Research and Exploration

Significant tectonic structures observed in the vicinity of Kahramanmaraş are the northern branch of the East Anatolian Fault Zone (EAFZ) (Sürgü segment, Çardak segment, Savrun segment, Çokak segment and Toprakkale segment), the southern branch of EAFZ (Gölbaşı segment and Amanos segment), Engizek Fault Zone, Kahramanmaraş Fault Zone and Narlı segment of the Dead Sea Fault Zone (DSFZ). The manuscript in which the 1795 Kahramanmaraş Earthquake has been mentioned is kept in the work of art called “Divan-ı Hasmi” in the Koyunoğlu Library of the Konya Metropolitan Municipality. From the statements in the work the intensity of the earthquake is 8,0 …

Geology And Geochemistry Of Nodular-Phosphate And Fault-Controlled Hydrothermal-Phosphate Mineralizations In Arikli And Nusratli Villages (Ayvacik-Çanakkale, Nw Turkey), Abdulbaki̇ Günaydin

Bulletin of the Mineral Research and Exploration

Uranium bearing phosphate mineralizations in the tuffs (ignimbrites) of Middle Miocene Arıklı volcanites in the vicinity of Arıklı and Nusratlı villages, Çanakkale have been known since 1977. In the study area, two types of phosphate mineralizations are present in different parts. First type and important one is in the tectonic zones in tuffs and along the contact between tuffs and Çetmi ophiolite and along the contacts of the units of the Küçükkuyu Formation in the Muharremin Tepe, Feyzullah Tepe, Örencik Tepe, Gedikharman Tepe in north and northwest of Arıklı village. Second type is the vein type mineralizations in the tuffs …

Tectonic Geomorphology Of Başkale Fault Zone, Azad Sağlam Selçuk, Meryem Düzgün

Bulletin of the Mineral Research and Exploration

Başkale Fault Zone is located between Şemdinli-Yüksekova fault zone in southeast Turkey and Guilato–Siahcheshmeh–Khoy fault system in southeast Iran. The fault zone starts from Yavuzlar town extending to Işıklar village in southwest. The BFZ is composed of three different segments which have orientations varying N75°E to N 80°E. Offset streams, fault-controlled drainage system such as Çığılsuyu stream, alluvial fans which line up parallel to the fault and contain deformation structures, fault flats, Plio-Quaternary volcanic rocks and volcanic structures, and fissure ridge travertines with formation continuing today are among morphotectonic characteristics that indicate the BFZ is active.

The objective of the …

Pb – Zn - Cd Accumulator Plants Grown Around The Görgü(Yesi̇lyurt) Pb – Zn Mine, -Malatya, Turkey, Güllü Kirat

Bulletin of the Mineral Research and Exploration

A study was carried out to identify Cd, Pb and Zn concentrations which exist in the roots and branches of Astragalus pycnocephalus Fischer and Verbascum euphraticum L. plants which grow in the Görgü (Yesilyurt-Malatya-Turkey) Pb-Zn mining area. A total of 60 samples were collected, 30 samples from plants and 30 samples from the soils where the plants grow. Cd concentrations range between 42.2 - 110.2 mg/kg, Pb: 2198 - >10000 mg/kg and Zn: 6088 - >10000 mg/kg in the soil where A. Pycnocephalus plants grow. Cd concentrations range between 4.1 - 544 mg/kg, Pb: 6918 - >10000 mg/kg and Zn: …

Geochemical Characteristics And Rare-Earth Element Distributions Of Kozbudaklar W-Skarn Deposit (Bursa, Western Anatolia), Ayşe Orhan, Halim Mutlu

Bulletin of the Mineral Research and Exploration

The Kozbudaklar W-skarn deposit occurs along the contact between Eocene Topuk Granitoid and Triassic İnönü Marble in Tavşanlı Zone. In the study area, the endoskarn is represented by plagioclase-pyroxene and exoskarn zone which is characterized by pyroxene, pyroxene-garnet, garnet and garnet-pyroxene skarn facies. According to major oxide element contents, exoskarn is of calcic character. In pyroxene and pyroxene-garnet skarn facies, tungsten and molybdenum abundances vary between 434-5507 ppm (mean 2330 ppm) and 8 - 90 ppm (mean 40 ppm). In the garnet and garnet-pyroxene skarns, concentrations of these elements are 271 - 7616 ppm (mean 2486 ppm) and 7 - …

Geographical Information Systems Based Using Logistic Regression Landslide Susceptibility Assessment Of The Çubuk-Kaleci̇k (Ankara) Between Şabanözü (Çankiri) Region, Hasan Elmaci, Senem Teki̇n, Nail Ünsal

Bulletin of the Mineral Research and Exploration

Landslides frequently occur particularly in certain parts in our country as well as in the world. They sometimes turn into natural disaster and cause socio-economic losses in significant magnitude. In this study, the landslide susceptibility analysis was performed in a total area of 2360 km² at 1/100,000 scale in map sheet of Çankırı-H30. According to the inventory map, 4,79% of the study area is formed of landslide areas and the movement type of available landslides are generally observed in the form of rotational slip. According to the database of the Turkish Landslide Inventory Map prepared by MTA, there are …

Alteration Zones Associated With Eocene Magmatism In The Olur (Erzurum) Area, Eastern Pontides And Their Significance, Güzide Önal, Mustafa Akyildiz, İsmet Cengi̇z, Mehmet Aslan, Serkan Özkümüş

Bulletin of the Mineral Research and Exploration

The Alpine Orogenic Belt with numerous porphyry Cu-Mo-Au mineralizations, starts from Eastern Europe continues through Turkey and the Caucasus and extends into Iran and Afghanistan. The study area of the Eastern Pontides is in this orogenic belt. Using fi eld and laboratory studies an attempt has been made to establish the origin of Yeşilbağlar, Kaban and Köprübaşı alteration zones in the Olur area (Erzurum). In the study area Early Eocene Coşkunlar volcanics and sub volcanic rocks have contact with the Oltu çayı volcanics of Early-Middle Jurassic. Alteration in the study area effects these Oltuçayı and Kaban volcanics. In the study …

Faculty Spotlight: Gordon Gribble, Samuel R. Reed

Dartmouth Undergraduate Journal of Science

Professor Gordon Gribble received his B.S. from U.C. Berkeley and his Ph.D. from the University of Oregon. He has been at Dartmouth for the past 49 years, and in that time he has taught chemistry to a great number of students. His research in the field of organic chemistry features indole and triterpenoid synthesis, and has yielded a wide range of medications.

Minerva 2017, The Honors College

Minerva

This issue of Minerva includes a feature on Honors College research collaboratives; an article on Honors students studying abroad in Singapore and Chile; an article reflecting upon the 15-year anniversary of the Honors College and the importance of mentorship; and articles on Honors students Isaiah Mansour and Aliya Uteova.

Unit Root Test For Panel Data Ar(1) Time Series Model With Linear Time Trend And Augmentation Term: A Bayesian Approach, Jitendra Kumar, Anoop Chaturvedi, Umme Afifa, Shafat Yousuf, Saurabh Kumar

Journal of Modern Applied Statistical Methods

The univariate time series models, in the case of unit root hypothesis, are more biased towards the acceptance of the Unit Root Hypothesis especially in a short time span. However, the panel data time series model is more appropriate in such situation. The Bayesian analysis of unit root testing for a panel data time series model is considered. An autoregressive panel data AR(1) model with linear time trend and augmentation term has been considered and derived the posterior odds ratio for testing the presence of unit root hypothesis under appropriate prior assumptions. A simulation study and real data analysis are …

'Parallel Universe' Or 'Proven Future'? The Language Of Dependent Means T-Test Interpretations, Anthony M. Gould, Jean-Etienne Joullié

Journal of Modern Applied Statistical Methods

Of the three kinds of two-mean comparisons which judge a test statistic against a critical value taken from a Student t-distribution, one – the repeated measures or dependent-means application – is distinctive because it is meant to assess the value of a parameter which is not part of the natural order. This absence forces a choice between two interpretations of a significant test result and the meaning of the test hypothesis. The parallel universe view advances a conditional, backward-looking conclusion. The more practical proven future interpretation is a non-conditional proposition about what will happen if an intervention is (now) applied …

Proportional Reversed Hazard Rate Models With Exponential Baseline, G. Barmalzan, H. Saboori

Applications and Applied Mathematics: An International Journal (AAM)

The proportional hazard regression models have been used extensively in survival analysis to understand and exploit the relationship between survival time and covariates. For left censored survival times, reversed hazard rate functions are more appropriate. In this paper, we discuss a parametric proportional reversed hazard rates model using exponential baseline. The estimation for the parameters are discussed. We also assess the performance of the proposed procedure based on a large number of Monte Carlo simulations. Finally, we illustrate the proposed method using a real case example and then we show that it provides a good and better fit than the …

Robust Measures Of Variable Importance For Multivariate Group Designs, Tolulope T. Sajobi, Lisa M. Lix

Journal of Modern Applied Statistical Methods

Variable importance measures based on discriminant analysis and multivariate analysis of variance are useful for identifying variables that discriminate between two groups in multivariate group designs. Variable importance measures are developed based on trimmed and Winsorized estimators for describing group differences in multivariate non-normal populations.

Modeling Agreement Between Binary Classifications Of Multiple Raters In R And Sas, Aya A. Mitani, Kerrie P. Nelson

Journal of Modern Applied Statistical Methods

Cancer screening and diagnostic tests often are classified using a binary outcome such as diseased or not diseased. Recently large-scale studies have been conducted to assess agreement between many raters. Measures of agreement using the class of generalized linear mixed models were implemented efficiently in four recently introduced R and SAS packages in large-scale agreement studies incorporating binary classifications. Simulation studies were conducted to compare the performance across the packages and apply the agreement methods to two cancer studies.

Inferential Procedures For Log Logistic Distribution With Doubly Interval Censored Data, Yue Fang Loh, Jayanthi Arasan, Habshah Midi, M. R. Abu Bakar

Journal of Modern Applied Statistical Methods

The log logistic model with doubly interval censored data is examined. Three methods of constructing confidence interval estimates for the parameter of the model were compared and discussed. The results of the coverage probability study indicated that the Wald outperformed the likelihood ratio and jackknife inferential procedures.

Approximating The Distribution Of Indefinite Quadratic Forms In Normal Variables By Maximum Entropy Density Estimation, Ghasem Rekabdar, Rahim Chinipardaz

Journal of Modern Applied Statistical Methods

The quadratic form of non-central normal variables is presented based on a sum of weighted independent non-central chi-square variables. This presentation provides moments of quadratic form. The maximum entropy method is used to estimate the density function because distribution moments of quadratic forms are known. A Euclidean distance is proposed to select an appropriate maximum entropy density function. In order to compare with other methods some numerical examples were evaluated. Also, for discrimination between two groups by the Euclidean distances, we obtained a stochastic representation for the linear discriminant function using the quadratic form. The maximum entropy estimation was an …

Missing Data In Longitudinal Surveys: A Comparison Of Performance Of Modern Techniques, Paola Zaninotto, Amanda Sacker

Journal of Modern Applied Statistical Methods

Using a simulation study, the performance of complete case analysis, full information maximum likelihood, multivariate normal imputation, multiple imputation by chained equations and two-fold fully conditional specification to handle missing data were compared in longitudinal surveys with continuous and binary outcomes, missing covariates, and an interaction term.

Semi-Parametric Method To Estimate The Time-To-Failure Distribution And Its Percentiles For Simple Linear Degradation Model, Laila Naji Ba Dakhn, Mohammed Al-Haj Ebrahem, Omar Eidous

Journal of Modern Applied Statistical Methods

Most reliability studies obtained reliability information by using degradation measurements over time, which contains useful data about the product reliability. Parametric methods like the maximum likelihood (ML) estimator and the ordinary least square (OLS) estimator are used widely to estimate the time-to-failure distribution and its percentiles. In this article, we estimate the time-to-failure distribution and its percentiles by using a semi-parametric estimator that assumes the parametric function to have a half- normal distribution or an exponential distribution. The performance of the semi-parametric estimator is compared via simulation study with the ML and OLS estimators by using the mean square error …

On Variance Balanced Designs, Dilip Kumar Ghosh, Sangeeta Ahuja

Journal of Modern Applied Statistical Methods

Balanced incomplete block designs are not always possible to construct because of their parametric relations. In such a situation another balanced design, the variance balanced design, is required. This construction of binary, equal replicated variance balanced designs are discussed using the half fraction of the 2n factorial designs with smaller block sizes. This method was also extended to construct another variance balanced design by deleting the last block of the resulting variance balanced designs. Its efficiency factor compared with randomized block designs was compared and found to be highly efficient.