Safe Use of Lasers in Research

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Safe Use of Lasers in Research

September 21, 2020
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Sir Isaac Newton (?) showing an optical experiment to an audience in his laboratory. Wood engraving by Martin after C. Laverie.


Posted August 9, 2020

 

The Laser Institute of America (LIA) is revising Z136.8 Standard for Safe Use of Lasers in Research, Development or Testing.  This standard provides recommendations for the safe use of lasers and laser systems that operate at wavelengths between 180 nm and 1 mm and are used to conduct research or used in a research, development, or testing environment. This environment is not limited to universities and national laboratories, but includes medical research facilities and high-tech product development evaluation settings.

You may obtain the public review draft at the link below:

https://www.lia.org/store/product/brsz1361-202x-draft-1-public-review

Comments due September 21st.

Send comments (with optional copy to [email protected]) to: Liliana Caldero ([email protected])

Universität Wien

 

We maintain the LIA consensus product suite on the standing agenda of our periodic Laboratory and Nota Bene teleconferences.  See our CALENDAR for the next meeting.

Issue: [13-37]

Category: Facilities Asset Management, Risk Management, Public Safety

Colleagues: Richard Robben, Markus Schaufele

Source: ANSI Standards Action

Agenda / Laboratory Safety & Sustainability Standards

 


LEARN MORE:

State and local government laser safety requirements

Bond Referenda

September 19, 2020
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Multiple Input Multiple Output

September 19, 2020
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Noncooperative Cellular Wireless with Unlimited Numbers of Base Station Antennas

Thomas L. Marzetta

New York University Department of Electrical and Computer Engineering

 

ABSTRACT: A cellular base station serves a multiplicity of single-antenna terminals over the same time-frequency interval. Time-division duplex operation combined with reverse-link pilots enables the base station to estimate the reciprocal forward- and reverse-link channels. The conjugate-transpose of the channel estimates are used as a linear precoder and combiner respectively on the forward and reverse links. Propagation, unknown to both terminals and base station, comprises fast fading, log-normal shadow fading, and geometric attenuation. In the limit of an infinite number of antennas a complete multi-cellular analysis, which accounts for inter-cellular interference and the overhead and errors associated with channel-state information, yields a number of mathematically exact conclusions and points to a desirable direction towards which cellular wireless could evolve. In particular the effects of uncorrelated noise and fast fading vanish, throughput and the number of terminals are independent of the size of the cells, spectral efficiency is independent of bandwidth, and the required transmitted energy per bit vanishes. The only remaining impairment is inter-cellular interference caused by re-use of the pilot sequences in other cells (pilot contamination) which does not vanish with unlimited number of antennas.

 

CLICK HERE for complete paper

 

 

 

 

LATITUDE & LONGITUDE PRACTICE

September 18, 2020
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Cooking

September 18, 2020
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Sports Scoring Dynamics

September 18, 2020
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Ancient sumo-wrestling competition from the Japanese Heian or Kamakura period (between 794 and 1333)

Predicting Sports Scoring Dynamics with Restoration and Anti-Persistence

Leto Peel

ICTEAM Université catholique de Louvain, Louvain-la-Neuve, Belgium

Aaron Clauset

Department of Computer Science, University of Colorado Boulder

 

Abstract:

Professional team sports provide an excellent domain for studying the dynamics of social competitions. These games are constructed with simple, well-defined rules and payoffs that admit a high-dimensional set of possible actions and nontrivial scoring dynamics. The resulting gameplay and efforts to predict its evolution are the object of great interest to both sports professionals and enthusiasts. In this paper, we consider two online prediction problems for team sports: given a partially observed game Who will score next? and ultimately Who will win? We present novel interpretable generative models of within-game scoring that allow for dependence on lead size (restoration) and on the last team to score (anti-persistence). We then apply these models to comprehensive within-game scoring data for four sports leagues over a ten-year period. By assessing these models’ relative goodness-of-fit we shed new light on the underlying mechanisms driving the observed scoring dynamics of each sport. Furthermore, in both predictive tasks, the performance of our models consistently outperforms baselines models, and our models make quantitative assessments of the latent team skill, over time.

 

CLICK HERE to order complete paper

Public Private Partnerships

September 18, 2020
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Health Physics / PINS

September 17, 2020
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Smart bluetooth low energy security system

September 16, 2020
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University of Mumbai / Fr. C. Rodrigues Institute of Technology Affiliate

 

Smart bluetooth low energy security system

Y. W. PrakashVishakha BiradarShenil VincentMinto MartinAnita Jadhav

Fr. Conceicao Rodrigues Institute of Technology / Navi Mumbai

 

The need for security in today’s world has become a mandatory issue to look after. With the increase in a number of thefts, it has become a necessity to implement a smart security system. Due to the high cost of the existing smart security systems which use conventional Bluetooth and other wireless technologies and their relatively high energy consumption, implementing a security system with low energy consumption at a low cost has become the need of the hour. The objective of the paper is to build a cost effective and low energy consumption security system using the Bluetooth Low Energy (BLE) technology. This system will help the user to monitor and manage the security of the house even when the user is outside the house with the help of webpage. This paper presents the design and implementation of a security system using PSoC 4 BLE which can automatically lock and unlock the door when the user in the vicinity and leaving the vicinity of the door respectively by establishing a wireless connection between the physical lock and the smartphone. The system also captures an image of a person arriving at the house and transmits it wirelessly to a webpage. The system also notifies the user of any intrusion by sending a message and the image of the intruder to the webpage. The user can also access the door remotely on the go from the website.

CLICK HERE for complete paper.

 

 

2016 Student Paper Winner / World Without Standards

September 16, 2020
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ANSI’s Committee on Education develops long-term strategies and action steps for the academic side of the education industry to promote the integration of standards and conformity assessment in the curricula in order to educate the next generation of business leaders on the strategic impact of standards and conformity assessment.

ANSI Announces Winners of 2016 Student Paper Competition

The Bleak Reality of a World without Standards
Amanda Goetz, Branden Hill, Libby Lee, & Jennifer Pattillo | Ferris State University | April 20, 2016

 

CLICK HERE FOR ALL 2016 STUDENT PAPER WINNERS 

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