scholarly journals ACUICULTURA DE PARGO LA MANCHA LUTJANUS GUTTATUS (STEINDACHNER, 1869) EN COSTA RICA DENTRO DE UN ENFOQUE ECOSISTÉMICO

2009 ◽  
Vol 1 ◽  
pp. 197 ◽  
Author(s):  
Angel Herrera-Ulloa ◽  
Jonathan Chacón-Guzmán ◽  
Gerando Zúñiga-Calero ◽  
Oscar Fajardo ◽  
Ricardo Jiménez-Montealegre
Keyword(s):  
Marine Fish ◽  
Pilot Project ◽  
Ecosystem Approach ◽  
Research Strategy ◽  
Laboratory Research ◽  
Larval Rearing ◽  
Parallel Processes ◽  
La Mancha ◽  
Set Up ◽  
Suitable Environment

La sobreexplotación pesquera y la búsqueda de alternativas ante la pobreza crónica han llevado a explorar el campo de la maricultura por medio de un enfoque ecosistémico se abrieron dos procesos paralelos: una estrategia e; investigación en laboratorio para el levantamiento larval de peces marinos tropicales y una estrategia de comanejo para desarrollar el cultivo de peces marinos tropicales. El pargo la mancha muestra gran potencial de producción de larvas y posterior cultivo en el mar. No mostró respuestas positivas a la inducción por medio de hormonas, el desarrollo de un ambiente adecuado para su reproducción espontánea, permitió tener desoves frecuentes y de calidad. La fase de levantamiento larval mostró contratiempos por el tamaño reducido de las larvas de pargo la mancha el manejo en tanques apropiados y el uso de enriquecedores permitieran mejorar los procesos y llegar a incrementar la producción de alevines. El enfoque ecosistémico permitió abrir los espacios necesarios que permitieron la operación de un proyecto piloto. La granja se creó con un enfoque productivo, pero también para turismo rural.Overfishing and the search for alternatives to it, led us to the explore mariculture as an option using an ecosystem-based approach through two parallel processes: an in-laboratory research strategy for larval rearing of tropical marine fish, and a strategy of co-management to develop tropical marine fish aquaculture. The spotted rose snapper shows great potential for larvae production and cage culture. This species showed no responses to hormone induction; however, the set up of a suitable environment allowed frequent, high-quality spontaneous spawnings. The larval rearing phase presented problems due to the small size of the larvae; although, management in appropriate tanks and the use of enrichments improved the processes, increasing the production of juveniles. This ecosystem approach allowed the operation of a profitable farm pilot project with a productive approach, but with rural tourism in mind as well.

Isolation, morphometry, and culture of Colurella sp. (Rotifera: Ploimida)

2013 ◽  
Vol 1 (2) ◽  
pp. 143
Author(s):  
Petrus P Letsoin ◽  
Henneke Pangkey ◽  
Julius Sampekalo ◽  
Inneke F.M Rumengan ◽  
Stenly Wullur ◽  
...  
Keyword(s):  
Body Size ◽  
Marine Fish ◽  
Fish Larvae ◽  
Nannochloropsis Oculata ◽  
Tropical Fish ◽  
Sampling Location ◽  
Larval Rearing ◽  
Brachionus Rotundiformis ◽  
Marine Fish Larvae ◽  
Significant Difference

The rotifer Brachionus rotundiformis (total body length 240.59±10.24 μm, lorica length 175.28±9.18 μm, and lorica width 124.28±7.76μm) is commonly used as starter food in the larval rearing of marine fish. But, larvae of some marine tropical fish species required starter food with body size smaller than B. rotundiformis. The present study was aimed to isolate minute rotifers from nature and to assess the possibility of culturing these rotifers. Sampling of rotifers was conducted in an estuary of Mangket (Kema-Minut), using plankton net (mesh size 40 µm). A trial of culturing the rotifers was conducted at salinities of 10, 20 and 30 ppt by using a microalga, Nannochloropsis oculata. A species of rotifer identified as Colurella sp. (family Lepadellidae) was successfully isolated from the sampling location. Body size of Colurella sp. was extremely small (Total length 123.22±5.45 μm, lorica length 95.96±3.81 μm, and lorica width 53.57±3.11 μm), which were smaller than Brachionus rotundiformis SS-type as a conventional starter food for marine fish larvae.  Results of culturing the minute rotifer Colurella sp. showed that the species grew well at salinities of 10, 20 and 30 ppt with no significant difference among treatments (ANOVA, p>0.05), indicating a potential use of minute rotifer Colurellasp. as starter food for marine fish larvae. Rotifera Branchionus rotundiformis (ukuran tubuh: panjang total 240,59±10,24 μm, panjang lorika 175,28±9,18 μm, dan lebar lorika 124,28±7,76μm) sering digunakan sebagai pakan awal pemeliharaan larva ikan laut. Namun, larva beberapa spesis ikan laut tropis membutuhkan pakan awal berukuran tubuh lebih kecil dari Branchionus rotundiformis. Penelitian ini bertujuan untuk mendapatkan minute rotifer dari alam (berukuran tubuh lebih kecil dari B. rotundiformis) dan menguji kemungkinan pemeliharaannya. Sampling rotifer dilakukan di perairan estuari Desa Mangket (Kema-Minut), menggunakan plankton net (ukuran mata jaring 40 µm). Uji coba pemeliharaan dilakukan pada salinitas (10, 20, dan 30 ppt) dengan menggunakan Nannochloropsis oculata. Satu spesies minute rotifer yang teridentifikasi sebagai Colurella sp. (family Lepadellidae) berhasil diisolasi dari lokasi sampling. Colurella sp. memiliki ukuran tubuh sangat kecil (panjang total [PT] 123,22±5,45 µm, panjang lorika [PL] 95,96±3,81 µm, dan lebar lorik [LL] 53,57±3,11 µm) yang mana lebih kecil dari Branchionus rotundiformis tipe-SS sebagai pakan awal larva ikan laut. Hasil uji coba pemeliharaan minute rotifer Colurella sp. menunjukkan bahwa spesis ini dapat tumbuh pada salinitas 10, 20, dan 30 ppt dengan perbedaan kepadatan populasi yang tidak signifikan antar perlakuan (Uji ANOVA, p > 0.05) mengindikasikan potensi pemanfaatan minute rotifer Colurella sp. sebagai pakan awal larva ikan laut.

scholarly journals A machine-learning-based alloy design platform that enables both forward and inverse predictions for thermo-mechanically controlled processed (TMCP) steel alloys

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Jin-Woong Lee ◽  
Chaewon Park ◽  
Byung Do Lee ◽  
Joonseo Park ◽  
Nam Hoon Goo ◽  
...  
Keyword(s):  
Machine Learning ◽  
Feature Space ◽  
Research Strategy ◽  
Nsga Ii ◽  
Steel Alloys ◽  
Non Linear ◽  
Data Driven Approach ◽  
Processing Information ◽  
Set Up ◽  
World Industry

AbstractPredicting mechanical properties such as yield strength (YS) and ultimate tensile strength (UTS) is an intricate undertaking in practice, notwithstanding a plethora of well-established theoretical and empirical models. A data-driven approach should be a fundamental exercise when making YS/UTS predictions. For this study, we collected 16 descriptors (attributes) that implicate the compositional and processing information and the corresponding YS/UTS values for 5473 thermo-mechanically controlled processed (TMCP) steel alloys. We set up an integrated machine-learning (ML) platform consisting of 16 ML algorithms to predict the YS/UTS based on the descriptors. The integrated ML platform involved regularization-based linear regression algorithms, ensemble ML algorithms, and some non-linear ML algorithms. Despite the dirty nature of most real-world industry data, we obtained acceptable holdout dataset test results such as R2 > 0.6 and MSE < 0.01 for seven non-linear ML algorithms. The seven fully trained non-linear ML models were used for the ensuing ‘inverse design (prediction)’ based on an elitist-reinforced, non-dominated sorting genetic algorithm (NSGA-II). The NSGA-II enabled us to predict solutions that exhibit desirable YS/UTS values for each ML algorithm. In addition, the NSGA-II-driven solutions in the 16-dimensional input feature space were visualized using holographic research strategy (HRS) in order to systematically compare and analyze the inverse-predicted solutions for each ML algorithm.

scholarly journals Om fotografering og fotografi som forskningsstrategi i barndomsforskning

2006 ◽  
Vol 10 (1) ◽  
pp. 63-78 ◽  
Author(s):  
Kim Rasmussen
Keyword(s):  
Empirical Studies ◽  
Pilot Project ◽  
Research Strategy ◽  
Ethnographic Research ◽  
Daily Lives ◽  
Empirical Material

Employing photography and photos in research on childhood This article deals with the question of whether the process of photography and its result the photo can contribute to empirical studies of childhood, and if so, what does this research strategy mean for both the researcher and the researched (the children). The article is based on two sources. The first is a pilot project in three parts of Den-mark in which children spontaneously took pictures of their daily lives (including family, friends, activities, institutions) for a week. The second is the use of photo-graphy in ethnographic research. The children constructed a set of empirical material about their lives as lived in different social arenas in the photos as well as explanations of these in discussing them with the researcher. While the material is not sufficient to provide a conclusive answer to the questions raised in this article, it does provide material for serious reflection.

Bridging Critical Constructivism and Postphenomenology at Techno-Anthropology

2020 ◽  
Vol 24 (1) ◽  
pp. 218-246 ◽  
Author(s):  
Tom Børsen ◽  
Keyword(s):  
Research Strategy ◽  
Special Focus ◽  
Master's Program ◽  
Master's Students ◽  
The Third ◽  
Critical Constructivism ◽  
Anthropological Research ◽  
Guest Lecturer ◽  
Set Up ◽  
Point Of Departure

Both postphenomenology and critical constructivism are central paradigms used as philosophies and theoretical resources at the Master’s program in Techno-Anthropology at Aalborg University. In the fall of 2018 a didactical experiment was set up as Techno-Anthropology Master’s students were introduced to postphenomenology and critical constructivism and asked to compare these two theoretical positions. This comparative assignment and following class discussions between students, a guest lecturer and teachers is the point of departure for this paper. First, the paper introduces Techno-Anthropology with a special focus on the roles of postphenomenology and critical constructivism in the Master’s program. The next part of the paper zooms in on how these two philosophical positions were presented to the students. The third part analyzes students’ comparisons of postphenomenology and critical constructivism. On that basis, the author identifies similarities and differences between the two positions and discusses how the two positions can complement each other in a unified Techno-Anthropological research strategy.

Multi-disciplinary assessment of attention-deficit hyperactivity disorder: a tertiary assessment package

1999 ◽  
Vol 23 (7) ◽  
pp. 421-424 ◽  
Author(s):  
H. Kat ◽  
Clay Frake ◽  
Rebecca Sawtell
Keyword(s):  
Attention Deficit Hyperactivity Disorder ◽  
Clinical Practice ◽  
Attention Deficit ◽  
Pilot Project ◽  
Clinical Implications ◽  
Assessment Protocol ◽  
Hyperactivity Disorder ◽  
Set Up

Aims and methodA tertiary assessment package was set up for the more equivocal cases of attention-deficit hyperactivity disorder (ADHD) who present with problems of inattention, impulsivity and overactivity. The structure of the three-day package was discussed, with an analysis of our experience in assessing 12 children using the pilot project. The package and Its use in clinical practice are presented.ResultsThe pilot project described can be modified into a two-day package.Clinical implicationsAssessment of ADHD conducted in multiple settings inherently has many advantages over single clinic assessment. We suggest that such an assessment protocol can be conducted cost effectively.

Mega-Doses of Behaviour Therapy for Treatment-Resistant Agoraphobics*

1983 ◽  
Vol 28 (2) ◽  
pp. 105-108 ◽  
Author(s):  
Morton S. Rapp ◽  
Martyn R. Thomas ◽  
Eleanor C. Reyes
Keyword(s):  
Effective Treatment ◽  
Cost Effective ◽  
Pilot Project ◽  
Treatment Resistant ◽  
Behaviour Therapy ◽  
The Past ◽  
Cost Effective Treatment ◽  
Intensive Program ◽  
Set Up

This was a pilot project set up to test the feasibility of effectively and inexpensively treating agoraphobic patients who had not responded to adequate trials of behaviour therapy (and other therapy) in the past. We employed a quantitatively intensive program of exposure therapy, calisthenics and muscular relaxation, and have explained the rationales for the choice of each treatment. The results were gratifying in four of the five patients, with follow-up to three years. This pilot project enabled us to set up a cost-effective treatment for all forms of agoraphobia which is as efficient as other programs described. It has also highlighted the fact that some patients exist who may do poorly on schedules of behaviour therapy which are adequate for some patients, and yet may do well if the amount of treatment is drastically increased.

Numerical Simulation of RSA Seepage Based on Random Structure Model

2008 ◽  
Vol 33-37 ◽  
pp. 779-784
Author(s):  
Ji Chao Sun ◽  
Guang Qian Wang ◽  
Quan Chen Gao
Keyword(s):  
Numerical Simulation ◽  
Computer Program ◽  
Rainfall Intensity ◽  
Laboratory Research ◽  
Random Structure ◽  
Structure Model ◽  
Simulation Research ◽  
Set Up

The research about seepage of RSA is little, but the material is familiar. There are many difficulties in laboratory research about the materials, so numerical simulation research in the paper is introduced. The model of the random structure about SRA is set up, and then the study of seepage is given. The conversion of the two boundaries is solved correctly in the computer program. So some conclusions are drawn that the rock blocks the seepage to some degree, and the changing of RSA seepage is little under the effect of the fluctuating of rainfall intensity, namely the changing of the seepage is less than the fluctuating of rainfall intensity. The study is the foundation of the next study about the coupled of stress and seepage of RSA.

scholarly journals Study on Descriptors of Acoustic Emission Signals Generated by Partial Discharges under Laboratory Conditions and in On-Site Electrical Power Transformer

2016 ◽  
Vol 41 (2) ◽  
pp. 265-276 ◽  
Author(s):  
Michał Kunicki ◽  
Andrzej Cichoń ◽  
Sebastian Borucki
Keyword(s):  
Acoustic Emission ◽  
Power Transformer ◽  
Electrical Power ◽  
High Sensitivity ◽  
Laboratory Research ◽  
Time Frequency ◽  
Laboratory Conditions ◽  
Set Up ◽  
Point To Point ◽  
Ae Signals

Abstract An acoustic emission method (AE) is widespread and often applied for partial discharge (PD) diagnostics, mainly due to its ease of application as well as noninvasiveness and relatively high sensitivity. This paper presents comparative analysis of AE signals measurement results archived under laboratory conditions as well as on-site actual AE signals generated by inside PDs in electrical power transformer during its normal service. Three different PD model sources are applied for laboratory research: point to point, multipoint to plate and surface type. A typical measuring set up commonly used for on-site transformer PD diagnostics is provided for the laboratory tasks: piezoelectric joint transducer, preamplifier, amplifier and measuring PC interface. During the on-site research there are three measuring tracks applied simultaneously. Time domain, time-frequency domain and statistical tools are used for registered AE signals analysis. A number of descriptors are proposed as a result of the analysis. In the paper, at- tempt of AE signals descriptors, archived under laboratory condition application possibilities for on-site PD diagnostics of power transformers during normal service is made.

scholarly journals Looking Thru the Nano Lens: Art, Science and Nature

2019 ◽  
Vol 27 (7) ◽  
Author(s):  
Chiara O’Reilly ◽  
Alice Motion ◽  
Chiara Neto
Keyword(s):  
Informal Learning ◽  
Pilot Project ◽  
Natural World ◽  
Postgraduate Students ◽  
The Public ◽  
The Arts ◽  
Set Up ◽  
New Research ◽  
The University ◽  
Opening Up

In 2018, an interdisciplinary team of researchers from the School of Chemistry, Sydney Nano and the Department of Art History at the University of Sydney set up a pilot project called the Nano Lens. Our project set out to examine and experiment with what it means to look closely at the natural world and inviting us, as colleagues, into a discussion and collaboration, drawing on our different perspectives. The Nano Lens also gave agency to a group of scientists in training (undergraduate and postgraduate students), and a sense of ownership of the science, which was then transmitted to the public. Taking inspiration from the artwork of the prominent Australian painter Margaret Preston (1875-1963) and the flora she depicted, the Nano Lens has opened up new research that intersects science and the arts; celebrating the value of collaboration and offering opportunities for staff and students to engage in and lead interdisciplinary discussions with the public. This paper will discuss our pilot project and the initial findings of our research together and discuss the benefits that our alliance has had in fostering collaboration and outreach activities where academics and students work together to share their research with the public. We seek to reflect on what we have learnt from the project and from opportunities to share our work and approaches. What does it mean to look like a scientist or to look like an artist and how has this enriched student learning? What value is there in opening up opportunities for informal learning about science and collaboration outside your disciplines?

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