# Physical Sciences and Mathematics Commons™

## All Articles in Physical Sciences and Mathematics

174,414 full-text articles. Page 4508 of 4510.

Iron(Iii) Tosylate-Catalyzed Deprotection Of Aromatic Acetals In Water, 2009 Illinois Wesleyan University

#### Iron(Iii) Tosylate-Catalyzed Deprotection Of Aromatic Acetals In Water, Ram S. Mohan, Margaret E. Olson, James P. Carolan, Michael V. Chiodo, Phillip R. Lazzara

##### Ram S. Mohan

The deprotection of aromatic as well as conjugated acetals and ketals in water is catalyzed by iron(III) tosylate (1.0–5.0 mol %). Iron(III) tosylate is an inexpensive and readily available catalyst. The use of water, the most environmentally benign solvent, makes this procedure especially attractive for acetal deprotection.

In Your Element: Green Bismuth, 2009 Illinois Wesleyan University

#### In Your Element: Green Bismuth, Ram S. Mohan

##### Ram S. Mohan

No abstract provided.

Reverse Engineering For Mobile Systems Forensics With Ares, 2009 University of Massachusetts - Amherst

#### Reverse Engineering For Mobile Systems Forensics With Ares, John Tuttle, Robert J. Walls, Erik G. Learned-Miller, Brian Neil Levine

##### Erik G Learned-Miller

We present Ares ,areverseengineeringtechniqueforassist- ing in the analysis of data recovered for the investigation of mobile and embedded systems. The focus of investigations into insider activity is most often on the data stored on the insider’s computers and digital devices — call logs, email messaging, calendar entries, text messages, and browser his- tory — rather than on the status of the system’s security. Ares is novel in that it uses a data-driven approach that in- corporates natural language processing techniques to infer the layout of input data that has been created according to some unknown specification. While some other reverse ...

Modeling Relations And Their Mentions Without Labeled Text, 2009 University of Massachusetts - Amherst

#### Modeling Relations And Their Mentions Without Labeled Text, Sebastian Riedel, Limin Yao, Andrew Mccallum

##### Andrew McCallum

Several recent works on relation extraction have been applying the distant supervision paradigm: instead of relying on annotated text to learn how to predict relations, they employ existing knowledge bases (KBs) as source of supervision. Crucially, these approaches are trained based on the assumption that each sentence which mentions the two related entities is an expression of the given relation. Here we argue that this leads to noisy patterns that hurt precision, in particular if the knowledge base is not directly related to the text we are working with. We present a novel approach to distant supervision that can alleviate ...

Subhorizontal Fabric In Exhumed Continental Lower Crust And Implications For Lower Crustal Flow: Athabasca Granulite Terrane, Western Canadian Shield, 2009 University of Massachusetts - Amherst

#### Subhorizontal Fabric In Exhumed Continental Lower Crust And Implications For Lower Crustal Flow: Athabasca Granulite Terrane, Western Canadian Shield, Gregory Dumond, Philippe Goncalves, Michael L. Williams, Michael J. Jercinovic

##### Michael J Jercinovic

The >20,000 km2 Athabasca granulite terrane is one of Earth's largest exposures of continental lower crust. The terrane is underlain by heterogeneous isobarically cooled orthogneisses termed the Mary batholith. A transect across the batholith documents early, penetrative subhorizontal to gently dipping gneissic foliation (S1). Kilometer- to meter-scale domains of S1 contain lineations (L1) defined by ribbons of recrystallized K-feldspar + plagioclase + quartz + amphibole ± orthopyroxene. L1 coincides with garnet aggregates, elongate mafic enclaves, and core-and-mantle structure in feldspar porphyroclasts. Lineations are coaxial with hinges of isoclinally folded layering (F1). L1 is interpreted as a composite mineral lineation with intersection and ...

Molecular Characteristics Of Phosphoric Acid Treated Soils, 2009 University Technology Malaysia

#### Molecular Characteristics Of Phosphoric Acid Treated Soils, Amin Eisazadeh, Khairul Anuar Kassim, Hadi Nur

The expansive nature of soils containing high amounts of clay minerals can be altered through chemical stabilization, resulting in a material suitable for construction purposes. The primary objective of this investigation was to study the changes induced in the molecular structure of phosphoric acid stabilized bentonite and lateritic soil using Nuclear Magnetic Resonance (NMR) and Fourier Transform Infrared (FTIR) spectroscopy. Based on the obtained data, it was found that a surface alteration mechanism was the main reason responsible for the improvement of treated soils. Furthermore, the results indicated that the Al present in the octahedral layer of clay minerals were ...

The Manual Of Aquatic Virus Ecology, 2009 University of Tennessee, Knoxville

#### The Manual Of Aquatic Virus Ecology, Steven Wilhelm

##### Steven Wilhelm

No abstract provided.

Invariant Weighted Wiener Measures And Almost Sure Global Well-Posedness For The Periodic Derivative Nls, 2009 University of Massachusetts - Amherst

#### Invariant Weighted Wiener Measures And Almost Sure Global Well-Posedness For The Periodic Derivative Nls, Andrea Nahmod, Tadahiro Oh, Luc Rey-Bellet, Gigliola Staffilani

##### Andrea Nahmod

In this paper we construct an invariant weighted Wiener measure associated to the periodic derivative nonlinear Schr\"odinger equation in one dimension and establish global well-posedness for data living in its support. In particular almost surely for data in a Fourier-Lebesgue space ${\mathcal F}L^{s,r}(\T)$ with $s \ge \frac{1}{2}$, $2 < r < 4$, $(s-1)r <-1$ and scaling like $H^{\frac{1}{2}-\epsilon}(\T),$ for small $\epsilon >0$. We also show the invariance of this measure.

Impact Of A Large Medical Waste Incinerator On Air Quality, 2009 AGH University o Science and Technology

#### Impact Of A Large Medical Waste Incinerator On Air Quality, Robert Oleniacz

##### Robert Oleniacz

In the paper, an assessment of the compliance with air emission limit values and the impact on air quality of one of the largest medical waste incinerators in Poland, with a total capacity of about 300 kg/h (two incineration lines) is presented. The assessment took the results of continuous and periodic measurements of emissions in the plant’s installation over a period of 12 months’ operation into account. For this period, a calculation was performed for the spread of air pollutants emitted by the two operating incineration lines. According to the analysis and calculations, the analysed medical waste incineration ...

2009 Institute of Chemistry, Technology and Metallurgy

#### Cyclohexane Oxidation And Cyclohexyl Hydroperoxide Decomposition By Poly(4-Vinylpyridine-Co-Divinylbenzene) Supported Cobalt And Chromium Complexes, Zeljko D. Cupic

##### Zeljko D Cupic

No abstract provided.

Fabric Development In Cm-Scale Shear Zones In Ultramafic Rocks, Red Hills, New Zealand, 2009 Texas A&M University

#### Fabric Development In Cm-Scale Shear Zones In Ultramafic Rocks, Red Hills, New Zealand, Caroline Webber, Julie Newman, Caleb Holyoke, Timothy Little, Basil Tikoff

##### Caleb Holyoke

No abstract provided.

2009 University of Akron

#### Accurate Differential Stress Measurement Using The Molten Salt Cell And Solid Salt Assemblies In The Griggs Apparatus With Applications To Strength, Piezometers And Rheology, Caleb Holyoke, Andreas Kronenberg

##### Caleb Holyoke

No abstract provided.

Deformation Of Single Crystal Sample Using D-Dia Apparatus Coupled With Synchrotron X-Rays: In-Situ Stress And Strain Measurements At High Pressure And Temperature, 2009 University of Akron

#### Deformation Of Single Crystal Sample Using D-Dia Apparatus Coupled With Synchrotron X-Rays: In-Situ Stress And Strain Measurements At High Pressure And Temperature, Jennifer Girard, Jiuhua Chen, Paul Raterron, Caleb Holyoke

##### Caleb Holyoke

No abstract provided.

2009 University of Malaya

#### Development And Evaluation Of A Chemistry Educational Software For Learning Organic Reactions Using Qualitative Reasoning, Rukaini Abdullah

##### Rukaini Abdullah

In science education, it is believed that students should understand the qualitative principles that govern the subject including the cause-effect relationships in processes before they are immersed in complex problem solving. Traditional educational programs for teaching organic chemistry do not usually explain or justify an observed chemical phenomenon. These programs do not “explain” simply because the results are obtained through chaining the rules or by searching the reaction routes that have been pre-coded in software. This paper discusses the development techniques, simulation results, and student evaluation of a software tool that aimed to help chemistry students learn organic processes through ...

An Analysis Of Past And Future Changes In The Ice Cover Of Two High-Arctic Lakes Based On Synthetic Aperture Radar (Sar) And Landsat Imagery, 2009 University of Massachusetts - Amherst

#### An Analysis Of Past And Future Changes In The Ice Cover Of Two High-Arctic Lakes Based On Synthetic Aperture Radar (Sar) And Landsat Imagery, Timothy L. Cook, Raymond S. Bradley

Space-borne remotely sensed data can provide valuable insight into cryospheric processes in remote high-latitude regions for which direct observations are limited. In this study we use synthetic aperture radar (SAR) and Landsat imagery to evaluate recent changes in the ice cover of Upper and Lower Murray Lakes (81°20′N, 69°30′W) on Ellesmere Island, Nunavut, Canada. These data highlight changes in ice conditions that have occurred over the past decade and provide a means for assessing the likely impacts of rising temperatures on future lake-ice conditions. Under current (1997–2007) climatic conditions the Murray Lakes average several weeks ...

Heteroclinic Solutions To An Asymptotically Autonomous Second-Order Equation, 2009 Embry-Riddle Aeronautical University

#### Heteroclinic Solutions To An Asymptotically Autonomous Second-Order Equation, Gregory S. Spradlin

We study the diﬀerential equation ¨x(t) = a(t)V' (x(t)), where V is a double-well potential with minima at x = ±1 and a(t) → l > 0 as |t| → ∞. It is proven that under certain additional assumptions on a, there exists a heteroclinic solution x to the diﬀerential equation with x(t) → −1 as t → −∞ and x(t) → 1 as t → ∞. The assumptions allow l − a(t) to change sign for arbitrarily large values of |t|, and do not restrict the decay rate of |l −a(t)| as |t| → ∞.

2009 University of Malaya

#### A Novel Peer-To-Peer Sms Security Solution Using A Hybrid Technique Of Ntru And Aes-Rijndael, Miss Laiha Mat Kiah

##### Miss Laiha Mat Kiah

Short message service (SMS) is a very popular and easy to use communications technology for mobile phone devices. Originally, this service was not designed to transmit secured data, so the security was not an important issue during its design. Yet today, it is sometimes used to exchange sensitive information between communicating parties. This paper proposes an alternative solution that provides a peer-to-peer SMS security that guarantees provision of confidentiality, authentication, integrity and non-repudiation security services. A hybrid cryptographic scheme has been used which combines the NTRU and AES-Rijndael algorithms to achieve more robust functionality. For implementation, a mobile information device ...

#### Environmental Crisis And Religious Rhetoric In Is God Green?, Jen Schneider

##### Jen Schneider

In the 2006 PBS documentary Is God Green?, Bill Moyers presents the emergence of two key contemporary trends in American political and religious life. The first is the growing popularity of an environmental movement within Christian evangelicalism called 'Creation Care'. Motivated by biblical passages that suggest humans have been 'commissioned' as stewards to care for the earth, or 'God's Body', Creation Care emerged in the late 1970s, gained momentum in the 1990s, and now 'constitutes the "fastest-growing form of Christian ministry"', according to the evangelical publication Christianity Today (Frame 1996:84, see also Psaros 2006:20-32). Is God Green ...

2009 SUNY Cortland

#### The Many Symmetries Of Calabi–Yau Compactifications, Moataz Emam

##### Moataz Emam

No abstract provided.

Reallocation Of Mesh Points In Fluid Problems Using Back-Propagation Algorithm, 2009 Philadelphia University