Preliminary results toward injection locking of an incoherent laser array

The preliminary results of phase locking an incoherent laser array to a master source in an attempt to achieve coherent operation are presented. The techniques necessary to demonstrate phase locking are described along with some topics for future consideration. As expected, the results obtained suggest that injection locking of an array, where the spacing between adjacent longitudinal modes of its elements is significantly larger than the locking bandwidth, may not be feasible

Information in Cournot: Signaling with Incomplete Control

We embed signaling in the classical Cournot model in which several firms sell a homogeneous good. The quality is known to all the firms, but only to some buyers. The quantity-setting firms can manipulate the price to signal quality. Because there is only one price in a market for a homogeneous good, each firm incompletely controls the price-signal through the quantity decision. We characterize the unique signaling Cournot equilibrium in which the price signals quality to the uninformed buyers. We then compare the signaling Cournot equilibrium with the full-information Cournot equilibrium. Signaling is shown to increase the equilibrium price. Moreover, under certain conditions regarding the composition of buyers, the number of firms, and the distribution of costs across firms, the effects of signalling and market externality cancel each other. In other words, the profits under signaling Cournot equal the profits of a cartel in a full-information environment.Cournot, Homogeneous good, Learning, Quality, Signaling.

Insider Trading with Different Market Structures

URL des Documents de travail : https://centredeconomiesorbonne.cnrs.fr/publications/Voir aussi l'article basé sur ce document de travail paru dans "International Review of Economics & Finance", Elsevier, 24, 2012, pp. 143-154Documents de travail du Centre d'Economie de la Sorbonne 2011.56 - ISSN : 1955-611XWe study an extension of Jain and Mirman (1999) with two insiders under three different market structures : (i) Cournot competition among the insiders, (ii) Stackelberg game between the insiders and (iii) monopoly in the real market and Stackelberg in the financial market. We show how the equilibrium outcomes are affected by each of the market structure. Finally we perform a comparative statics analysis between the models.On étudie une extension du modèle de Jain-Mirman (1999) avec deux initiés dans trois structures de marché différentes : (i) concurrence à la Cournot entre les initiés, (ii) concurrence à la Stackelberg entre les initiés et (iii) structure de monopole dans le marché des biens et concurrence à la Stackelberg sur le marché financier. On montre que les variables d'équilibre sont tous influencés par la structure de marché sous-jacente. Finalement, on présente une statique comparative entre les modèles étudiés

Evaluation of low-frequency voltage dividers, using the step response

PostprintA method to characterize the behavior of low frequency voltage dividers, based on the step response, is presented. Amplitude errors and phase displacements can be evaluated, in an absolute way, without any auxiliary standard divider

Documentation for the CETACEA database of marine mammal literature references

This documentation for the CETACEA database of marine mammal literature references updates and expands the original work by Watkins, Bird, Moore, and Tyack 1988 (Reference Database Marine Mammal Literature, Technical Report WHOI-88-2). The CETACEA database is a comprehensive index of literature references used to file, store, search, retrieve, and format the data on marine animals. Organization of the references is complementary to features developed by William E. Schevill for his library of older cetacea literature, having direct association of species with over 300 indexed subjects, and with observation dates, locations, etc. This documentation describes the operation of the database (360 records), including indexing, sorting, and retrieval information developed though continued use of these systems. SPECIES and SUBJECT HEADING lists with their codes have been updated. Other databases have also developed around these indexing and sorting strategies to complement the CETACEA database, including databases of animal sounds for both the recordng data and the acoustic spectral information stored in libraries of digital sound cuts.Funding was provided by the Office of Naval Research through Contract Number N00014-88-K-0273

SOUND database of marine animal vocalizations : structure and operations

The SOUND database system for marine animal vocalizations has been updated to include changes in the structure and operations that have evolved with use. These include more convenient operations, greater flexibilty in analysis routines, and a revised database structure. The formats for data sorting and indexing, database structure, and analysis routines have developed into a convenient research tool. This report is a revision of the earlier operating manual for the SOUND databases (Watkins, Fristrup, and Daher 1991.) The interactive databases that comprise the SOUND system provide comprehensive means for quantitative analyses and statistical comparisons of marine animal vocalizations. These SOUND databases encompass (1) descriptive text databases cataoging the WHOI collection of underwater sound recordings of marine animals, (2) sets of files of digital sound sequences, (3) text databases organizing the digital sound cuts, and (4) software for analysis, display, playback, and export of selected sound files. The text databases index and sort the information about the sounds, and the digital sound cut files are accessed directly from the text record. From the text database, the sound cut data may be analyzed on screen, listened to, and compared or exported as desired. The objective of this work has been the development of a basic set of tools for the study of marine animal sound. The text databases for cataloging the recordings provide convenient sorting and selection of sounds of interest. Then, as specific sequences are digitized from these recordings, they become part of another database system that manages these acoustic data. Once a digital sound is part of the organized database, several tools are available for interactive spectrographic display, sound playback, statistical feature extraction, and export to other application programs.Funding was provided by the Office of Naval Research through the Ocean Acoustics Program (code 11250A) under Contract No. N00014-88-K-0273 and No. N00014-91-J-1445 with supplemental support by ORINCON/DARPA and NRL (code 211)

Software tools for acoustic database management

Digital archiving of bioacoustic data provides both curatorial and scientific benefits. To realize these benefits, key system requirements must be satisfied. This report discusses these requirements, and describes the software tools developed by the WHOI bioacoustic laboratory to maintain and utilize an archive of digitized biological sounds. These tools are written in standard C code, and are designed to run on PC-compatible microcomputers. Both the usage and structure of these programs are described in relation to the SOUND database of marine animal sounds. These tools include software for analog-to-digital conversion, text header maintenance, data verification and interactive spectrographic review. Source code listings are supplied.Funding was provided by the Office of Naval Research through the Ocean Acoustics Program (code 11250) Contract N00014-88-K-0273 and Grant N00014-J-1445 with supplemental support from NOARL (code 211)

A pilot Citizens' Assembly on Electricity and Energy Justice in Hamra, Lebanon

The Citizens’ Assembly Pilot (CA) on energy justice and electricity was a conceptual and a methodological experiment conducted over five sessions over three days in the neighborhood of Hamra and Beirut in October and November 2020. The CA aimed at exploring meanings, dimensions, priorities of energy justice in a deliberative democratic setting. The CA tackled five main questions: How did we get to where we are? What is energy justice to us? What is the energy-mix we would like to have? What do we need to be doing as individuals and communities to achieve a better energy future? How should we move forward with our decisions on the above questions? The responses produced interesting findings for researchers and international stakeholders to consider further; such as skepticism over renewable energy targets, the interest in circular solutions to solve multiple intersecting service sectors like waste and water in particular. It also raised questions over decentralization as well as privatization at different scales of governance

Identification of rare nonsynonymous variants in SYNE1/CPG2 in bipolar affective disorder

Background: Bipolar affective disorder (BPD) is a severe mood disorder with a prevalence of ∼ 1.5% in the population. The pathogenesis of BPD is poorly understood; however, a strong heritable component has been identified. Previous genome-wide association studies have indicated a region on 6q25, coding for the SYNE1 gene, which increases disease susceptibility. SYNE1 encodes the synaptic nuclear envelope protein-1, nesprin-1. A brain-specific splice variant of SYNE1, CPG2 encoding candidate plasticity gene 2, has been identified. The intronic single-nucleotide polymorphism with the strongest genome-wide significant association in BPD, rs9371601, is present in both SYNE1 and CPG2. / Methods: We screened 937 BPD samples for genetic variation in SYNE1 exons 14–33, which covers the CPG2 region, using high-resolution melt analysis. In addition, we screened two regions of increased transcriptional activity, one of them proposed to be the CPG2 promoter region. / Results and Conclusion: We identified six nonsynonymous and six synonymous variants. We genotyped three rare nonsynonymous variants, rs374866393, rs148346599 and rs200629713, in a total of 1099 BPD samples and 1056 controls. Burden analysis of these rare variants did not show a significant association with BPD. However, nine patients are compound heterozygotes for variants in SYNE1/CPG2, suggesting that rare coding variants may contribute significantly towards the complex genetic architecture underlying BPD. Imputation analysis in our own wholegenome sequencing sample of 99 BPD individuals identified an additional eight risk variants in the CPG2 region of SYNE1