REMUS: a small, low cost AUV; system description, field trials and performance results

2002 ◽  
Author(s):  
B. Allen ◽  
R. Stokey ◽  
T. Austin ◽  
N. Forrester ◽  
R. Goldsborough ◽  
...  
Keyword(s):  
Low Cost ◽  
Field Trials ◽  
System Description ◽  
And Performance ◽  
Performance Results ◽  
Description Field

scholarly journals Sensitivity of Annual Weeds against Sulfentrazone 48 SC herbicide in Rice Cultivation

2018 ◽  
Vol 21 (1) ◽  
pp. 67-76 ◽  
Author(s):  
MKA Bhuiyan ◽  
MM Mahbub ◽  
ZI Baki ◽  
L Nahar
Keyword(s):  
Low Cost ◽  
Visual Assessment ◽  
Field Trials ◽  
Weed Suppression ◽  
Growing Seasons ◽  
Cyperus Difformis ◽  
Transplanted Rice ◽  
And Performance ◽  
Hand Weeding ◽  
Annual Weeds

Herbicides are used successfully for weed control in rice fields for rapid effect, easier to application and low cost involvement in comparison to the traditional methods of hand weeding. Sulfentrazoneis a new pre-planting herbicide in Bangladesh. Field trials were conducted at Bangladesh Rice Research Institute (BRRI), Gazipur during Aman 2014 and Boro 2014-15 to evaluate the efficacy of sulfentrazone 48 SC on weed suppression and performance of transplanted rice. Treatments were Sulfentrazone 48 SC @ 150, 200 and 250 ml ha-1, pretilachlor 500 EC @ 1000 ml ha-1, weed free and unweeded control. Visual assessment indicated that this herbicide possesses high selectivity and not toxic to rice plants. The results revealed that the major weed flora associated with the transplanted rice was mainly comprised of two grasses, two sedges and four broadleaves in Aman 2014 and two grasses, two sedge and two broadleaves in Boro 2014-15. The most dominant weeds were Cyperus difformis, Echinochloa crus-galli, Scirpus maritimus and Monochoria vaginalis in both the growing seasons. Application of Sulfentrazone 48 SC @ 200 ml ha-1 was most effective to suppress weed density and dry masses in both the seasons resulting increased grain yield more than 50% as compared to unweeded control. Therefore, Sulfentrazone 48 SC @ 200 ml ha-1 should apply two or three days before plantingfor effectively control weeds in riceBangladesh Rice j. 2017, 21(1): 67-76

Transitioning to nontoxic antifouling paints

2015 ◽  
Vol 44 (2) ◽  
pp. 116-121 ◽  
Author(s):  
Mónica García ◽  
Mirta Stupak ◽  
Miriam Pérez ◽  
Guillermo Blustein
Keyword(s):  
Design Methodology ◽  
Low Cost ◽  
Field Trials ◽  
Fouling Organism ◽  
Antifouling Paints ◽  
Promising Alternative ◽  
Content Type ◽  
Copper Leaching ◽  
Different Types ◽  
And Performance

Purpose – The purpose of this paper is to reduce the amount of copper in antifouling paints by using eugenol as an additive. Biofouling leads to deterioration of any submerged material. The most widespread method for control is the application of cuprous oxide antifouling paints which are toxic. First of all, the paper describes the effect of eugenol on larvae of Balanus amphitrite (fouling organism) under laboratory conditions and then the preparation, application and performance of different types of antifouling paints in field trials. Design/methodology/approach – Three types of soluble matrix antifouling paints were prepared with different pigments. The first one containing 16 per cent v/v copper, the second with 1.6 per cent copper and the third with 1.6 per cent copper + 2 per cent eugenol. Findings – After 12 months of immersion in Mar del Plata harbour paints containing 1.6 per cent copper + eugenol and 16 per cent copper were the most effective. Although these formulations showed a similar performance, copper + eugenol-based paint contains 90 per cent lesser copper than a traditional copper-based formulation. Originality/value – The use of antifouling paints with copper + eugenol combination as pigment is a promising alternative due to its performance, low cost and reduction in copper leaching to environment.

scholarly journals Develop models of anatomical studies using acrylic resin

2017 ◽  
Vol 34 (02) ◽  
pp. 049-053
Author(s):  
F. Carvalho ◽  
W. Rossi Junior ◽  
A. Esteves
Keyword(s):  
Low Cost ◽  
Acrylic Resin ◽  
Leonardo Da Vinci ◽  
Human Anatomy ◽  
Alternative Methods ◽  
Anatomical Studies ◽  
Andreas Vesalius ◽  
A New Technique ◽  
And Performance ◽  
Performance Results

Abstract Introduction: Many researchers among them Galen, Andreas Vesalius, Hippocrates, Leonardo Da Vinci, among others, have dedicated themselves to anatomical studies and methods of conservation bodies. Being Human Anatomy a basic content for all undergraduate courses involving health, their study is essential, as well as getting parts and cadavers for study. Faced with the difficulties encountered today, the search for alternative methods in teaching the human body has been incessant. Given a search for human anatomy to find a way of preserving anatomical specimens in the best possible way, new techniques have been described and studied over time laboratories. This work was performed in order to obtain a new technique for the study of anatomical parts by applying a fresh crystal acrylic resin, with low cost and the elimination of liquid preservatives, thus facilitating the handling of the parts. Material and Methods: Different anatomical parts, which were included in a block of ice were used; were cut from 4 to 6 mm and subjected to a battery of alcohol to rapid dehydration, then the pieces were embedded in acrylic resin Crislight® and then subjected to sanding and finishing, and polishing to obtain a good aesthetics and performance. Results: This study demonstrated that it is possible to include anatomical piece polyester resin, thereby obtaining a study model that offers excellent visibility, a technique easy to perform and affordable. Conclusion: But more studies should be conducted to improve the technique and develop models with better quality. Although the behavior of the resin due to different tissue types in a future study should be noted.

The Relation Between Financial Incentives, Motivation, and Performance

2017 ◽  
Vol 16 (2) ◽  
pp. 61-76 ◽  
Author(s):  
Anaïs Thibault Landry ◽  
Marylène Gagné ◽  
Jacques Forest ◽  
Sylvie Guerrero ◽  
Michel Séguin ◽  
...  
Keyword(s):  
Financial Incentives ◽  
Work Performance ◽  
Autonomous Motivation ◽  
Compensation Plans ◽  
Work Settings ◽  
Path Analyses ◽  
Three Samples ◽  
And Performance ◽  
Performance Results

Abstract. To this day, researchers are debating the adequacy of using financial incentives to bolster performance in work settings. Our goal was to contribute to current understanding by considering the moderating role of distributive justice in the relation between financial incentives, motivation, and performance. Based on self-determination theory, we hypothesized that when bonuses are fairly distributed, using financial incentives makes employees feel more competent and autonomous, which in turn fosters greater autonomous motivation and lower controlled motivation, and better work performance. Results from path analyses in three samples supported our hypotheses, suggesting that the effect of financial incentives is contextual, and that compensation plans using financial incentives and bonuses can be effective when properly managed.

Programmable Integrated Photonics

2020 ◽  
Author(s):  
José Capmany ◽  
Daniel Pérez
Keyword(s):  
Integrated Circuit ◽  
Performance Monitoring ◽  
Low Cost ◽  
Limiting Factors ◽  
External Control ◽  
Integrated Photonics ◽  
New Paradigm ◽  
Photonic Integrated Circuit ◽  
And Performance ◽  
Application Fields

Programmable Integrated Photonics (PIP) is a new paradigm that aims at designing common integrated optical hardware configurations, which by suitable programming can implement a variety of functionalities that, in turn, can be exploited as basic operations in many application fields. Programmability enables by means of external control signals both chip reconfiguration for multifunction operation as well as chip stabilization against non-ideal operation due to fluctuations in environmental conditions and fabrication errors. Programming also allows activating parts of the chip, which are not essential for the implementation of a given functionality but can be of help in reducing noise levels through the diversion of undesired reflections. After some years where the Application Specific Photonic Integrated Circuit (ASPIC) paradigm has completely dominated the field of integrated optics, there is an increasing interest in PIP justified by the surge of a number of emerging applications that are and will be calling for true flexibility, reconfigurability as well as low-cost, compact and low-power consuming devices. This book aims to provide a comprehensive introduction to this emergent field covering aspects that range from the basic aspects of technologies and building photonic component blocks to the design alternatives and principles of complex programmable photonics circuits, their limiting factors, techniques for characterization and performance monitoring/control and their salient applications both in the classical as well as in the quantum information fields. The book concentrates and focuses mainly on the distinctive features of programmable photonics as compared to more traditional ASPIC approaches.

Sign in / Sign up

Export Citation Format

Share Document