# Physical Sciences and Mathematics Commons™

## All Articles in Physical Sciences and Mathematics

181,449 full-text articles. Page 8 of 4696.

A Data Set Of Bloodstain Patterns For Teaching And Research In Bloodstain Pattern Analysis: Gunshot Backspatters, 2018 Iowa State University

#### A Data Set Of Bloodstain Patterns For Teaching And Research In Bloodstain Pattern Analysis: Gunshot Backspatters, Daniel Attinger, Yu Liu, Ricky Faflak, Yalin Rao, Bryce A. Struttman, Kris De Brabanter, Patrick M. Comiskey, Alex L. Yarin

##### Mechanical Engineering Publications

This is a data set of blood spatter patterns scanned at high resolution, generated in controlled experiments. The spatter patterns were generated with a rifle or a handgun, and different ammunitions. The resulting atomized blood droplets travelled opposite to the bullet direction, generating a gunshot backspatter on a poster board target sheet. Fresh blood with anticoagulants was used; its hematocrit and temperature were measured. Main parameters of the study were the bullet shape, size and speed, and the distance between the blood source and target sheet. Several other parameters were explored in a less systematic way. This new and original ...

Overview Of The Kentucky Geological Survey No. 1 Hanson Aggregates Well, Carter County, Kentucky, 2018 University of Kentucky

#### Overview Of The Kentucky Geological Survey No. 1 Hanson Aggregates Well, Carter County, Kentucky, J. Richard Bowersox, Stephen F. Greb, David C. Harris

##### Kentucky Geological Survey Information Circular

The Kentucky Geological Survey drilled the No. 1 Hanson Aggregates well in northern Carter County, Ky., to assess the carbon dioxide storage capacity and confining intervals in the Middle Cambrian–Upper Ordovician section in the southern Appalachian Basin, north of the Rome Trough. The well was drilled to a total depth of 4,835 ft, penetrating the Mississippian–Middle Cambrian Paleozoic section and 120 ft of Neoproterozoic Grenville granite gneiss. Steel casing was cemented to the surface at 350 ft and 2,944 ft to isolate the deep wellbore from the near-surface aquifer and provide anchors for pressure-control equipment. Eight ...

Diffusion And Concentration Of Solids In The Dead Zone Of A Protoplanetary Disk, 2018 Lund University; University of Nevada, Las Vegas

#### Diffusion And Concentration Of Solids In The Dead Zone Of A Protoplanetary Disk, Chao-Chin Yang, Mordecai-Mark Mac Low, Anders Johansen

##### Physics & Astronomy Faculty Publications

The streaming instability is a promising mechanism to drive the formation of planetesimals in protoplanetary disks. To trigger this process, it has been argued that sedimentation of solids onto the mid-plane needs to be efficient, and therefore that a quiescent gaseous environment is required. It is often suggested that dead-zone or disk-wind structure created by non-ideal magnetohydrodynamical (MHD) effects meets this requirement. However, simulations have shown that the mid-plane of a dead zone is not completely quiescent. In order to examine the concentration of solids in such an environment, we use the local-shearing-box approximation to simulate a particlegas system with ...

Determinants Of Interval Matrices, 2018 Charles University, Prague, Czech Republic

#### Determinants Of Interval Matrices, Jaroslav Horáček, Milan Hladík, Josef Matějka

##### Electronic Journal of Linear Algebra

In this paper we shed more light on determinants of real interval matrices. Computing the exact bounds on a determinant of an interval matrix is an NP-hard problem. Therefore, attention is first paid to approximations. NP-hardness of both relative and absolute approximation is proved. Next, methods computing verified enclosures of interval determinants and their possible combination with preconditioning are discussed. A new method based on Cramer's rule was designed. It returns similar results to the state-of-the-art method, however, it is less consuming regarding computational time. Other methods transferable from real matrices (e.g., the Gerschgorin circles, Hadamard's inequality ...

Impacts Of Pacific Ssts On Atmospheric Circulations Leading To California Winter Precipitation Variability: A Diagnostic Modeling, 2018 APEC Climate Center

#### Impacts Of Pacific Ssts On Atmospheric Circulations Leading To California Winter Precipitation Variability: A Diagnostic Modeling, Boksoon Myoung, Sang-Wook Yeh, Jinwon Kim, Menas Kafatos

##### Mathematics, Physics, and Computer Science Faculty Articles and Research

One of the primary meteorological causes of the winter precipitation deficits and droughts in California (CA) is anomalous developments and maintenance of upper-tropospheric ridges over the northeastern Pacific. In order to understand and find the key factors controlling the winter precipitation variability in CA, the present study examines two dominant atmospheric modes of the 500 hPa geopotential height in the Northern Hemisphere using an Empirical Orthogonal Function (EOF) and their associated large-scale circulation patterns for the last 41 winters (1974/75–2014/15). Explaining 17.5% of variability, the second mode (EOF2) shows strong anti-cyclonic circulations in the North Pacific ...

Tim_Rinn_Final_Disertation.Pdf, 2018 Iowa State University

#### Tim_Rinn_Final_Disertation.Pdf, Timothy T. Rinn

##### Timothy Rinn

No abstract provided.

2018 Huaibei Normal University

#### Inequalities Between $\Mid A\Mid + \Mid B\Mid$ And $\Mid A^{*} \Mid + \Mid B^{*} \Mid$, Yun Zhang

##### Electronic Journal of Linear Algebra

Let $A$ and $B$ be complex square matrices. Some inequalities between $\mid A \mid + \mid B \mid$ and $\mid A^{*} \mid + \mid B^{*} \mid$ are established. Applications of these inequalities are also given. For example, in the Frobenius norm, $$\parallel\, A+B \,\parallel_{F} \leq \sqrt[4]{2} \parallel \mid A\mid + \mid B\mid \, \parallel_{F}.$$

Structured Eigenvalue/Eigenvector Backward Errors Of Matrix Pencils Arising In Optimal Control, 2018 Technische Universitaet Berlin

#### Structured Eigenvalue/Eigenvector Backward Errors Of Matrix Pencils Arising In Optimal Control, Christian Mehl, Volker Mehrmann, Punit Sharma

##### Electronic Journal of Linear Algebra

Eigenvalue and eigenpair backward errors are computed for matrix pencils arising in optimal control. In particular, formulas for backward errors are developed that are obtained under block-structure-preserving and symmetry-structure-preserving perturbations. It is shown that these eigenvalue and eigenpair backward errors are sometimes significantly larger than the corresponding backward errors that are obtained under perturbations that ignore the special structure of the pencil.

Worker Activity Recognition In Smart Manufacturing Using Imu And Semg Signals With Convolutional Neural Networks, 2018 Missouri University of Science and Technology

#### Worker Activity Recognition In Smart Manufacturing Using Imu And Semg Signals With Convolutional Neural Networks, Wenjin Tao, Ze-Hao Lai, Ming-Chuan Leu, Zhaozheng Yin

##### Zhaozheng Yin

In a smart manufacturing system involving workers, recognition of the worker's activity can be used for quantification and evaluation of the worker's performance, as well as to provide onsite instructions with augmented reality. In this paper, we propose a method for activity recognition using Inertial Measurement Unit (IMU) and surface electromyography (sEMG) signals obtained from a Myo armband. The raw 10-channel IMU signals are stacked to form a signal image. This image is transformed into an activity image by applying Discrete Fourier Transformation (DFT) and then fed into a Convolutional Neural Network (CNN) for feature extraction, resulting in ...

2018 Northeastern Illinois University

#### Distance And Intersection Number In The Curve Complex Of A Closed Surface, Nancy C. Wrinkle

##### Faculty Research and Creative Activities Symposium

No abstract provided.

Spiral Waves Modeling, 2018 Northeastern Illinois University

#### Spiral Waves Modeling, Paulo H. Acioli

##### Faculty Research and Creative Activities Symposium

No abstract provided.

Arsenoplatins Vs. Combination Of Platinum Drugs And Arsenic Trioxide, 2018 Northeastern Illinois University

#### Arsenoplatins Vs. Combination Of Platinum Drugs And Arsenic Trioxide, Denana Miodragovic

##### Faculty Research and Creative Activities Symposium

No abstract provided.

Measuring The One-Way Velocity Of Light, 2018 Northeastern Illinois University

#### Measuring The One-Way Velocity Of Light, Charles Nissim-Sabat

##### Faculty Research and Creative Activities Symposium

No abstract provided.

Enabling The Social Internet Of Things, 2018 Northeastern Illinois University

#### Enabling The Social Internet Of Things, Ahmed E. Khaled, Sumi Helal

##### Faculty Research and Creative Activities Symposium

No abstract provided.

2018 Northeastern Illinois University

#### Structural Characterization Of Bacterial Red Light Photoreceptors By Atomic Force Microscopy, Kenneth T. Nicholson

##### Faculty Research and Creative Activities Symposium

No abstract provided.

2018 Northeastern Illinois University

#### Linear Analysis Of Tumor Morphology During Growth Using Bending Energy, Emma A. Turian

##### Faculty Research and Creative Activities Symposium

No abstract provided.

The Neiumatic Shake Table: A New Tool, 2018 Northeastern Illinois University

#### The Neiumatic Shake Table: A New Tool, Elisabet M. Head, John Papiewski

##### Faculty Research and Creative Activities Symposium

No abstract provided.

2018 Northeastern Illinois University

#### Punctuated Cognitive Psychological Interventions On Student's Disposition To Learn And The Effects On Mathematical Achievement, Matthew D. Graham

##### Faculty Research and Creative Activities Symposium

No abstract provided.

2018 Northeastern Illinois University

#### Molecular Origami For Biochemistry: Paper Models Of Proteins, Carbohydrates, And Nucleic Acids, Charles Abrams

##### Faculty Research and Creative Activities Symposium

No abstract provided.

Singular And Ill-Conditioned Linear Systems, 2018 Northeastern Illinois University

#### Singular And Ill-Conditioned Linear Systems, Zhonggang Zeng

##### Faculty Research and Creative Activities Symposium

No abstract provided.