A Soldier\u27s Blog: Balancing Service Members\u27 Personal Rights vs. National Security Interests

This Note examines the competing interests between ensuring military personnel\u27s freedom of speech while protecting national security interests. The Author recognizes the necessity of protecting national security interests but emphasizes that military personnel\u27s rights to free speech must be protected as long as such speech poses no threat to military security. In conclusion, clearer protections must be implemented to protect military personnel\u27s right to free speech

A Soldier\u27s Blog: Balancing Service Members\u27 Personal Rights vs. National Security Interests

This Note examines the competing interests between ensuring military personnel\u27s freedom of speech while protecting national security interests. The Author recognizes the necessity of protecting national security interests but emphasizes that military personnel\u27s rights to free speech must be protected as long as such speech poses no threat to military security. In conclusion, clearer protections must be implemented to protect military personnel\u27s right to free speech

Measuring the eccentricity of the Earth orbit with a nail and a piece of plywood

I describe how to obtain a rather good experimental determination of the eccentricity of the Earth orbit, as well as the obliquity of the Earth rotation axis, by measuring, over the course of a year, the elevation of the Sun as a function of time during a day. With a very simple "instrument" consisting of an elementary sundial, first-year students can carry out an appealing measurement programme, learn important concepts in experimental physics, see concrete applications of kinematics and changes of reference frames, and benefit from a hands-on introduction to astronomy.Comment: 12 pages, 6 figure

Ethical Hacking for Effective Defense

This Grants Collection for Ethical Hacking for Effective Defense was created under a Round Eight ALG Textbook Transformation Grant. Affordable Learning Georgia Grants Collections are intended to provide faculty with the frameworks to quickly implement or revise the same materials as a Textbook Transformation Grants team, along with the aims and lessons learned from project teams during the implementation process. Documents are in .pdf format, with a separate .docx (Word) version available for download. Each collection contains the following materials: Linked Syllabus Initial Proposal Final Reporthttps://oer.galileo.usg.edu/compsci-collections/1008/thumbnail.jp

Discrete Structures (KSU)

This Grants Collection for Discrete Structures was created under a Round Eleven ALG Textbook Transformation Grant. Affordable Learning Georgia Grants Collections are intended to provide faculty with the frameworks to quickly implement or revise the same materials as a Textbook Transformation Grants team, along with the aims and lessons learned from project teams during the implementation process. Documents are in .pdf format, with a separate .docx (Word) version available for download. Each collection contains the following materials: Linked Syllabus Initial Proposal Final Reporthttps://oer.galileo.usg.edu/compsci-collections/1025/thumbnail.jp

An S2 Fluorescence Model for Interpreting High-Resolution Cometary Spectra. I. Model Description and Initial Results

A new versatile model providing S2 fluorescence spectrum as a function of time is developed with the aim of interpreting high resolution cometary spectra. For the S2 molecule, it is important to take into account both chemical and dynamic processes because S2 has a short lifetime and is confined in the inner coma where these processes are most important. The combination of the fluorescence model with a global coma model allows for the comparison with observations of column densities taken through an aperture and for the analysis of S2 fluorescence in different parts of the coma. Moreover, the model includes the rotational structure of the molecule. Such a model is needed for interpreting recent high spectral resolution observations of cometary S2. A systematic study of the vibrational-rotational spectrum of S2 is undertaken, including relevant effects, such as non-equilibrium state superposition and the number density profile within the coma due to dynamics and chemistry, to investigate the importance of the above effects on the scale length and abundance of S2 in comets.Comment: 20 pages, 7 figure

Book Reviews

The Law of the Soviet State By Andrei Y. Vyshinsky New York: The Macmillan Company, 1949. Pp. xvii, 749. $15.00 The Role of the Soviet Court By I. T. Golyakov Washington, D. C.: Public Affairs Press, 1948, Pp. 20.$1.00 Soviet Civil Law By Vladimir Gsovski Ann Arbor: University of Michigan Volume I, 1948. Pp. xxxvii, 909. Volume II, 1949. Pp. xx, 906. $10.00 per volume;$15.00 per set reviewer: Stanley D. Rose ============================== Missouri Lawyer By John T. Barker Philadelphia: Dorrance & Company,1949. Pp. 391. $3.50 reviewer: Walter P. Armstrong ============================== Magna Carta: Its Role in the Making of the English Constitution, 1300-1629 By Faith Thompson Minneapolis: University of MinnesotaPress, 1948. Pp. x, reviewer: Paul H. Hardacre ============================== Juvenile Courts in North Carolina By Wiley Britton Sanders Chapel Hill: University of North Carolina Press, 1948. Pp. viii, 210.$4.00 reviewer: Sam Davis Tatu

Compensation strategies for robotic motion errors for additive manufacturing (AM)

It is desirable to utilise a robotic approach in additive manufacturing as Computer Numerical Control (CNC) is expensive and it has high maintenance costs. A robotic approach is relatively inexpensive compared to CNC and can provide much more flexibility, enabling a variety of configurations and easier parallel processing. However, robots struggle to achieve high positioning accuracy and are more prone to disturbances from the process forces. This paper attempts to characterise the robot position and velocity errors, which depend on the build strategy deployed, using a laser speckle correlation sensor to measure the robotic motion. An assessment has been done as to whether these errors would cause any problem in additive manufacturing techniques, where the test parts were built using the Wire+Arc Additive Manufacture (WAAM) technique. Finally, different compensation strategies are discussed to counter the robotic errors and a reduction of 3 mm in top surface profile irregularity by varying the wire feed speed (WFS) during the path has been demonstrated

Laser speckle velocimetry for robot manufacturing

A non-contact speckle correlation sensor for the measurement of robotic tool speed is presented for use in robotic manufacturing and is capable of measuring the in-plane relative velocities between a robot end-effector and the workpiece or other surface. The sensor performance was assessed in the laboratory with the sensor accuracies found to be better than 0:01 mm/s over a 70 mm/s velocity range. Finally an example of the sensors application to robotic manufacturing is presented where the sensor was applied to tool speed measurement for path planning in the wire and arc additive manufacturing process using a KUKA KR150 L110/2 industrial robot