Letteratura scientifica selezionata sul tema "Groupe Bolloré"
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Articoli di riviste sul tema "Groupe Bolloré":
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Malo, Antoine, e Benoît Hervieu-Léger. "« Une demande démocratique s’est exprimée »". Revue Projet N° 398, n. 1 (15 gennaio 2024): 50–51. http://dx.doi.org/10.3917/pro.398.0050.
Abstract (sommario):
Juin 2023. Alors que s’engage le rachat du Journal du dimanche par le groupe Bolloré, le journaliste d’extrême droite Geoffroy Lejeune est annoncé à la tête de la rédaction. Débute alors une grève historique, au large retentissement. Antoine Malo, ancien du journal, revient sur cet épisode.
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Chen, Zhiwen, Jianguo Zhao, Zehui Liu, Xiuli Bai, Weijia Li, Zhifang Guan, Ming Zhou e Hongwei Zhu. "Graphene-Delivered Insecticides against Cotton Bollworm". Nanomaterials 12, n. 16 (9 agosto 2022): 2731. http://dx.doi.org/10.3390/nano12162731.
Abstract (sommario):
Nanopesticides can facilitate controlled release kinetics and efficiently enhance the permeability of active ingredients to reduce the dosage and loss of pesticides. To clarify the synergistic mechanism of graphene–insecticide nanocarriers against cotton bollworm, treatment groups, namely, control, graphene (G), insecticide (lambda-cyhalothrin (Cyh) and cyfluthrin (Cyf)), and graphene-delivered insecticide groups were used to treat the third-instar larvae of cotton bollworm. The variations in phenotypes, namely, the body length, body weight, and mortality of the cotton bollworm, were analyzed. The results show that graphene enhances the insecticidal activity of lambda-cyhalothrin and cyfluthrin against cotton bollworm. The two graphene-delivered insecticides with optimal compositions (3:1) had the strongest inhibitory effects and the highest mortality rates, with the fatality rates for the 3/1 Cyh/G and Cyf/G mixture compositions being 62.91% and 38.89%, respectively. In addition, the 100 μg/mL Cyh/G mixture had the greatest inhibitory effect on cotton bollworm, and it decreased the body length by 1.40 mm, decreased the weight by 1.88 mg, and had a mortality rate of up to 61.85%. The 100 and 150 μg/mL Cyh/G mixtures achieved the same mortality rate as that of lambda-cyhalothrin, thus reducing the use of the insecticide by one-quarter. The graphene-delivered insecticides could effectively destroy the epicuticle spine cells of the cotton bollworm by increasing the permeability and, thus, the toxicity of the insecticides.
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Sári-Barnácz, Fruzsina Enikő, Mihály Zalai, Stefan Toepfer, Gábor Milics, Dóra Iványi, Mariann Tóthné Kun, János Mészáros, Mátyás Árvai e József Kiss. "Suitability of Satellite Imagery for Surveillance of Maize Ear Damage by Cotton Bollworm (Helicoverpa armigera) Larvae". Remote Sensing 15, n. 23 (1 dicembre 2023): 5602. http://dx.doi.org/10.3390/rs15235602.
Abstract (sommario):
The cotton bollworm (Helicoverpa armigera, Lepidoptera: Noctuidae) poses significant risks to maize. Changes in the maize plant, such as its phenology, influence the short-distance movement and oviposition of cotton bollworm adults and, thus, the distribution of the subsequent larval damage. We aim to provide an overview of future approaches to the surveillance of maize ear damage by cotton bollworm larvae based on remote sensing. We focus on finding a near-optimal combination of Landsat 8 or Sentinel-2 spectral bands, vegetation indices, and maize phenology to achieve the best predictions. The study areas were 21 sweet and grain maze fields in Hungary in 2017, 2020, and 2021. Correlations among the percentage of damage and the time series of satellite images were explored. Based on our results, Sentinel-2 satellite imagery is suggested for damage surveillance, as 82% of all the extremes of the correlation coefficients were stronger, and this satellite provided 20–64% more cloud-free images. We identified that the maturity groups of maize are an essential factor in cotton bollworm surveillance. No correlations were found before canopy closure (BBCH 18). Visible bands were the most suitable for damage surveillance in mid–late grain maize (|rmedian| = 0.49–0.51), while the SWIR bands, NDWI, NDVI, and PSRI were suitable in mid–late grain maize fields (|rmedian| = 0.25–0.49) and sweet maize fields (|rmedian| = 0.24–0.41). Our findings aim to support prediction tools for cotton bollworm damage, providing information for the pest management decisions of advisors and farmers.
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Avila, G., S. Cabrera-Villalba, P. Melgarejo, L. Roman, Z. Morel, R. Rolón, M. Zarza et al. "AB0433 BIOLOGICAL THERAPIES SURVIVAL FOR RHEUMATOID ARTHRITIS, PSORIATIC ARTHRITIS SPONDYLOARTHRITIS AND JUVENILE ONSET ARTHRITIS. A COHORT STUDY FROM BIOBADAGUAY". Annals of the Rheumatic Diseases 82, Suppl 1 (30 maggio 2023): 1405.2–1405. http://dx.doi.org/10.1136/annrheumdis-2023-eular.5869.
Abstract (sommario):
BackgroundBIOBADAGUAY is the Paraguayan/Uruguayan registry of adverse events in patients with inflammatory rheumatic conditions under biologic therapy (BT). The registry includes patients with different diagnosis that share similar biological therapies indication. However, different pathogenesis, patients’ characteristics and treatment options can affect the survival of the BT.ObjectivesTo analyze survival of biological therapies among patients with chronic inflammatory arthritis in the BIOBADAGUAY registry.MethodsPatients with chronic inflammatory arthritis (CIA) such us rheumatoid arthritis (RA), spondylarthritis (SpA), psoriatic arthritis (PsA) and juvenile onset arthritis (JIA) enrolled in BIOBADAGUAY where analyzed. Other diseases included in the registry were grouped as others. Drug survival and clinical and epidemiological predictors were studied. Fewer than BT 25 registries were not included in the study. Survival analysis was performed using Kaplan-Meier estimators, and Cox proportional hazard models were used to estimate hazard ratios (HRs).ResultsA total of 1378 treatments (876 RA, 176 SpA, 40 JIA, 88 PsA, 98 others) were included. The mean BT survival according to diagnosis was 300.9 (95%CI, 230.6-444.4) weeks (wks) for RA; 541.6 (95%CI, 409.6-541.6) wks for SpA; 154.1 (95%CI, 125.0-194.7) wks for JIA and 555.3 (95%CI, 282.1-611.6) wks for PsA. In the general analysis, when survival was compared between different diagnosis, it was found that BT survival for SpA patients (p˂0.05; HR=1.23 [95% CI 0.97-1.56]) was higher than other CIA. On the other hand, JIA diagnosis was significantly associated with a lower BT survival (p˂0.05; HR=1.85 [95% CI 1.36–2.52]). In the general analysis, no significant differences between BT were found (p>0.05). When each drug survival was analyzed according to diagnosis, adalimumab showed a significant difference in SpA patients (p˂0,05; HR=0.55 [95% CI, 0.39-0.76]) and JIA patients (p=<0.005; HR=1.8 [95% CI 1.36–2.52]). Etanercept had a significant difference in RA (p <0.005; HR=0.57 [95% CI, 0.40-0.82]) and JIA patients (p=<0.005; HR=2.07 [95% CI, 1.39–3.06]). Following these results we analyzed JIA patients and found that remission was the principal reason of discontinuation in this group of patients (p<0.005, HR=10.700 [95% CI, 5.91–19.36]).Multivariable analysis showed that the number of previous BTs (p=0.01, HR=1.18 [95% CI, 1.03-1.34), corticosteroid treatment (p=0.05; HR=1.18 [95% CI; 0.99–1.40), SpA (p=0.01; HR=0.688 [95% CI 0.51-0.91) and JIA diagnosis (p=0.02; HR=1.4 [95% CI, 1.06-2.02]) where associated with BT survival.ConclusionIn this study we found different survival profiles according to diagnosis. This could be related to different pathogenesis, discontinuation motives and treatment options in different health systems.REFERENCES:NIL.Acknowledgements:NIL.Disclosure of InterestsGabriela Avila Grant/research support from: Casa Boller - Roche, Sonia Cabrera-Villalba Grant/research support from: Casa Boller - Roche, Patricia Melgarejo Grant/research support from: Casa Boller - Roche, Lourdes Roman Grant/research support from: Casa Boller - Roche, ZOILO MOREL Grant/research support from: Casa Boller - Roche, Roger Rolón Grant/research support from: Casa Boller - Roche, Mariela Zarza Grant/research support from: Casa Boller - Roche, Macarena Soto Estevez: None declared, Evelyn Leiva Grant/research support from: Casa Boller - Roche, Angelica Amarilla Grant/research support from: Casa Boller - Roche, Paola Pusineri Grant/research support from: Casa Boller - Roche, Clyde PArodi Grant/research support from: Casa Boller - Roche, Carolina Díaz: None declared, Belen Acevedo: None declared, ALEJANDRO FERNANDEZ: None declared, Vannia Valinotti Grant/research support from: Casa Boller - Roche, PALOMA DE ABREU TRIGUEROS Grant/research support from: Casa Boller - Roche.
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Manley, Donald G. "PINK BOLLWORM1 MOTH DISPERSAL IN AND AROUND COTTON, SUGAR BEETS, AND ALFALFA2". Journal of Entomological Science 22, n. 1 (1 gennaio 1987): 90–93. http://dx.doi.org/10.18474/0749-8004-22.1.90.
Abstract (sommario):
Huber oil traps baited with gossyplure were used to compare early season pink bollworm, Pectinophora gossypiella (Saunders), moth catches in beets and nearby cotton, and catches throughout the growing season in alfalfa and cotton. Differences between trap catches in sugar beets and cotton were generally not significant at the 0.05 level. Traps in cotton caught significantly more moths than those in alfalfa during most of the season. Late in the season there were no significant differences between the two groups. Traps placed in nearby non-crop and fallow areas generally caught fewer moths than those in cotton, alfalfa or sugar beets.
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Bundy, C. Scott, e R. M. McPherson. "Cropping Preferences of Common Lepidopteran Pests in a Cotton/Soybean Cropping System". Journal of Entomological Science 42, n. 1 (1 gennaio 2007): 105–18. http://dx.doi.org/10.18474/0749-8004-42.1.105.
Abstract (sommario):
Two soybean varieties (an early-maturing Group V and a later-maturing Group VII) and two cotton varieties (a conventional and a transgenic Bacillus thuringiensis Berliner [Bt]) were grown in adjacent replicated large field plots at two locations for 3 growing seasons. The abundance of commonly-observed lepidopteran pests within these two crops was observed weekly throughout each growing season. The green cloverworm, Hypena scabra (F.); soybean looper, Pseudoplusia includens (Walker), and; velvetbean caterpillar, Anticarsia gemmatalis Hübner, preferred soybeans over cotton at all six test sites. The bollworm complex, Helicoverpa zea (Boddie) and Heliothis virescens (F.), preferred soybeans at one site, cotton at two sites, and no crop preference at three sites. There was no difference in the seasonal mean abundance of the pests between the two soybean maturity groups. A few varietal differences were noted on soybeans on specific sampling dates; however, they occurred when insect numbers were low. Population densities approached economic injury levels on both the early and later-maturing soybean varieties. In cotton, the bollworm complex was significantly more abundant in conventional cotton than in Bt cotton. Although soybean loopers are a pest of both crops, soybeans are preferred when they are planted adjacent to cotton. Given this behavioral response, soybeans might serve as a trap crop to attract soybean loopers into a small planting of soybeans and out of the major planting of cotton.
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McCaffery, A. R. "Resistance to insecticides in Heliothine Lepidoptera: a global view". Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences 353, n. 1376 (29 ottobre 1998): 1735–50. http://dx.doi.org/10.1098/rstb.1998.0326.
Abstract (sommario):
The status of resistance to organophosphate, carbamate, cyclodiene and pyrethroid insecticides in the heliothine Lepidoptera is reviewed. In particular, resistance in the tobacco budworm, Heliothis virescens , and the corn earworm, Helicoverpa zea , from the New World, and the cotton bollworm, Helicoverpa armigera , from the Old World, are considered in detail. Particular emphasis has been placed on resistance to the most widely used of these insecticide groups, the pyrethroids. In each case, the incidence and current status of resistance are considered before a detailed view of the mechanisms of resistance is given. Controversial issues regarding the nature of mechanisms of resistance to pyrethroid insecticides are discussed. The implications for resistance management are considered.
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Ahmad, Salman, M. Shafiq Ansari, Nadeem Khan e Fazil Hasan. "Toxic effects of insecticides on the life table and development of Earias vittella (Lepidoptera: Noctuidae) on okra". International Journal of Tropical Insect Science 37, n. 01 (23 dicembre 2016): 30–40. http://dx.doi.org/10.1017/s1742758416000230.
Abstract (sommario):
AbstractOkra,Abelmoschus esculentus(L.) Moench, is an important vegetable crop grown throughout the tropical and temperate regions of the world. Spotted bollworm,Earias vittella(Fab.), is one of the most important insect pests of okra. The effects of insecticides (cypermethrin, imidacloprid, carbaryl and neem oil) were studied on the fitness of the F1 generation ofE. vittellaby a demographic method. Life table was constructed from the eggs obtained by the surviving individuals that had ingested insecticides. Survivorship and expectancy was highest with the commencement of age and gradually decreased with the progression of age in the treatment groups and control. However, it was reduced in the treatment groups in comparison to control groups. Highest numbers of unhatched eggs (17%) were recorded with imidacloprid and cypermethrin treatments, whereas all the eggs hatched in control groups. Larval mortality was high in the initial instars as compared to late instars. Potential fecundity was significantly reduced to 94 females/female/generation treated with cypermethrin as compared to 256 in the untreated females. Developmental time of pre-pupa and pupa was significantly decreased with cypermethrin treatment. The intrinsic rate of increase was reduced to 0.0201 females/female/day in cypermethrin groups as compared to 0.046 in the control groups. The generation time was 33.27 days in the control, which was reduced to 26.78 days with carbaryl treatment and was increased to 37.5 days with neem oil. Insecticides cause adverse effect on the surviving generation ofE. vittella, and may be incorporated as a valuable component in the integrated management ofE. vittellaon okra.
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Allen, Luttrell, Little, Parys e Perera. "Response of Bt and Non-Bt Cottons to High Infestations of Bollworm (Helicoverpa zea Boddie) and Tobacco Budworm (Heliothis virescens (F.)) under Sprayed and Unsprayed Conditions". Agronomy 9, n. 11 (15 novembre 2019): 759. http://dx.doi.org/10.3390/agronomy9110759.
Abstract (sommario):
Early-maturing and full-season Bt and non-Bt cottons were exposed to high densities of tobacco budworm (Heliothis virescens (F.)) and bollworm (Helicoverpa zea Boddie) in 0.04 ha field cages during the summers of 2011 and 2012 to measure the possible need for supplemental use of insecticides on Bt cotton. Fruit survival within-season and at-harvest was carefully mapped on individual plants within comparative plots of all cottons untreated and sprayed with lambda-cyhalothin (0.0448 kg a.i./ha) or chlorantraniliprole (0.1009 kg a.i./ha) following insect infestations. Differences in lint yields among cotton maturity groups were not always detected, but early-maturing Bt cottons were among the higher yielding experimental plots for both years. Depending on the insecticide treatment, average harvested fruit ranged from 0.3 to 7.1 open bolls per plant for non-Bt cotton plots, while Bt cotton plots ranged from 1.8 to 7.5 open bolls per plant during the two-year study. Bt cottons generally protected fruit from insect damage and resulted in final yields comparable to those of insecticide sprayed Bt and non-Bt cottons. Unsprayed non-Bt cottons were significantly damaged by insects in these high-infestation environments.
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Vasileva, Katya, e Velichka Todorova. "Assessment of pepper genetic resources for Verticillium wilt resistance". Genetika 54, n. 2 (2022): 829–40. http://dx.doi.org/10.2298/gensr2202829v.
Abstract (sommario):
Study was carried out for determining the reaction of 83 peppers varieties, breeding lines, and local forms /landraces/ to fungal pathogen Verticillium dahliae Kleb. as they are the part of the Balkan Capsicum core collection which was deeply phenotyped in the recent years. The development of the disease was reported twice and high degree of resistance was reported for 41 accessions. The highest percentage of highly resistant group of genotypes was 72%, followed by resistant group with 23%. The infestation in the groups of medium sensitive, sensitive and highly sensitive was respectively 1%, 3%, and 1%. The highly sensitive (0 - 19%), sensitive (20 - 39%) and medium sensitive (40 - 59%) are consisted by the var. blocky, var. ratundum and var. kapia accessions. The group of resistant (60 - 79%) was dominated by var. ratundum and var. blocky. Materials from var. kapia prevail of highly resistant (80 - 100%). The group of pungent peppers accessions was more resistant to Verticillium infestation. On the base of current and previous results may concluded that four accessions were identified as resistant to TMV and non-infested by Verticillium while two ones possessed low infestation by green aphids, trips and cotton bollworm and non-attacked by Verticillium. Other seven genotypes combined lack of infestation by Verticillium wilt with high levels of three and more agronomic and biochemical traits.
Tesi sul tema "Groupe Bolloré":
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Andre, Camille. "Bolloré Transport & Logistics face au risque géopolitique au Sahel central (janvier 2013-mai 2021) : analyse spatiale, quantitative et des jeux d’acteurs : l’apport de la méthode géopolitique à la compréhension des contextes d’opération dégradés". Electronic Thesis or Diss., Paris 8, 2021. http://www.theses.fr/2021PA080074.
Abstract (sommario):
Le Sahel central connaît depuis la chute du Mali en 2012 d’importantes problématiques sécuritaires. Après s’être accaparé la rébellion touarègue nord-malienne, les groupes armés djihadistes ont été contraints à la clandestinité par l’intervention extérieure française dès janvier 2013. Ces événements de 2012-2013 interviennent dans un contexte géopolitique et politique déjà complexe où de nombreux types d’acteurs évoluent (djihadistes, narcotrafiquants, groupes armés touaregs, milices d'auto-défense, civils, politiques …), chacun avec leurs stratégies propres et leurs représentations. Cette thèse CIFRE part du postulat que de nombreux événements et points de ruptures étaient prévisibles et que certaines dynamiques futures pourront l’être grâce à une approche méthodologique singulière. Ce travail mobilise la méthode géopolitique, constituant un biais d’appréhension qui se concentre sur l’analyse spatiale et multiscalaire ; sur l’analyse des acteurs et de leurs représentations et sur la constitution de plusieurs bases de données (événements armés et politiques) afin d’en extraire des analyses quantitatives et qualitatives. De cette thèse ressort la possibilité de monitorer l’étude quotidienne d’un territoire et ainsi repérer les signaux faibles des mutations géopolitiques, sécuritaire, politique. La méthode géopolitique apporte un éclairage sur la compréhension des dynamiques conflictuelles et des risques (géopolitiques, sécuritaires, politiques, réputationnels) que le contexte d’opération fait peser sur Bolloré Transport & Logistics et, plus largement, sur les acteurs économiques présents dans la zone qui se doivent de protéger leurs effectifs humains, matériels, leurs chaînes d’approvisionnement et leur réputationSince the fall of Mali in 2012, the central Sahel has been experiencing major security issues. After cornering the Northern Malian Tuareg rebellion, jihadist armed groups were forced into hiding by the French external intervention as early as January 2013. These 2012-2013 events take place in an already complex geopolitical and political context where many types of actors are evolving (jihadists, drug traffickers, Tuareg armed groups, self-defense militias, civilians, politicians ...), each with their own strategies and representations. This CIFRE thesis starts from the premise that many events and breaking points were predictable and that certain future dynamics could be foreseen thanks to a singular methodological approach. This essay uses the geopolitical method, constituting a means of understanding that focuses on spatial and multiscalar analysis; on the analysis of actors and their representations and on the constitution of several databases (armed and political events) in order to extract quantitative and qualitative analyses. From this thesis emerges the possibility of monitoring the daily study of a territory and thus identifying the weak signals of geopolitical, security and political changes. The geopolitical method sheds light on the conflictual dynamics and risks (geopolitical, security, political, reputational) that the business context poses for Bolloré Transport & Logistics and, more broadly, for the economic actors present in the area who must protect their staff and equipment, their supply chains and their reputation
Libri sul tema "Groupe Bolloré":
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John, Hudson. Branching out: The story of Philip Bollom and the Johnson group. Bristol: White Tree Books, 1989.
Capitoli di libri sul tema "Groupe Bolloré":
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Bareksten, Berit. "Barn, bok og boller: Fra frivillig lokalsamfunnsarbeid med boksamling og formidling til offentlig bibliotekfilial i bydelen". In Kollektiv mobilisering, 301–28. Cappelen Damm Akademisk/NOASP, 2022. http://dx.doi.org/10.23865/noasp.168.ch12.
Abstract (sommario):
This chapter is about the collective mobilization and cooperation that emerged through the voluntary organization Initiativ:Laksevåg (I:L) and the establishment of the library and dissemination arena Barn, Bok & Boller (Children, Books and Buns) (BBB). How did I:L and BBB play alongside the area initiative for indre Laksevåg, the local cultural office and other cultural institutions, private actors, organizations and arenas in the local community, as well as partners in neighboring municipalities, in promoting the re-establishment of a public library through collective mobilization and community development? The chapter highlights how grassroots mobilization can create lasting systemic change and contribute to increased participation and activity in a community. Ripple effects have led to the establishment of several arenas, which in turn have reached new groups in the population.
Atti di convegni sul tema "Groupe Bolloré":
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Omar, Tarek, Nabih E. Bedewi e Timothy Hylton. "Cost-Effective Structural Anti-Ram Security Barriers: New Design, Computer Modeling and Test Validation". In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41510.
Abstract (sommario):
Terrorist attacks became a major threat to the safety, security, and economy of our nation in the last few years. The Attacks against important facilities could have different techniques; however the main source of ground attacks is the application of excessive amount of energy to the designated facility through a vehicle intrusion and/or a blast. In the current research, a new approach of using steel-structure barriers is presented. Several new structural anti-ramming barriers are designed and analyzed using nonlinear Finite Element Analysis (FEA). In this new design, commercial steel-structural components were used in order to reduce the manufacturing cost. These new steel-structure security devices have proven an excellent capability to sustain severe impacts by spreading substantial amount of the impact energy throughout the entire structure and the supporting soil/concrete. In the current research, three anti-ramming bollard systems, for K4, K8 and K12 impact conditions, were presented. The bollard systems were made of commercial steel unites connected together to produce the entire bollard structure. The FE modeling and simulation results of the bollard systems were presented in details in this paper. The FEA for the K4 bollard was validated by comparing the simulation results with the actual test results. The FE simulation results correlated very well with the actual test results. The steel-structure barriers could have much less shallow foundation to account for the in-city utility restrictions. It also has the advantage of easier and faster installation minimizing the required digging and installation time inside the city. The design could also be modified to account for different threat levels and different sites’ restrictions.
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Zúñiga-Fernández, Sebastián, Maja Vuckovic, Nikolaus Vogt, Yerko Chacon e Omar Cuevas. "Revival of an abandoned telescope: the Boller and Chivens Bochum 0.61-metre telescope of Universidad de Valparaiso". In Ground-based and Airborne Telescopes VII, a cura di Roberto Gilmozzi, Heather K. Marshall e Jason Spyromilio. SPIE, 2018. http://dx.doi.org/10.1117/12.2314014.
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Nakamura, Takahisa, e Yohsuke Yoshioka. "Effectiveness of Bollards in Deterring Pedestrians from Running into the Roadway". In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002443.
Abstract (sommario):
Bollards are poles that are placed at the intersection of a roadway and a sidewalk to prevent vehicles from entering. They are mainly installed to alert motorists and are rarely used to control pedestrians. However, given their morphological characteristics, bollards should be able to play a role in physically and psychologically controlling pedestrian behavior.This study focuses on the deterrent effect of bollards on pedestrians, preventing them from running into the roadway. We have developed an experimental method to reproduce situations where people are likely to run into the roadway using immersive virtual environment technology. It was difficult to quantitatively analyze the behavioral characteristics of such situations using conventional methods. In addition, we conducted experiments on subjects using the developed experimental method to verify the effect of linearly placed bollards on pedestrians to deter them from running into the roadway. This study aims to obtain knowledge that will help improve the environment and prevent accidents caused by pedestrians walking into the roadway.A total of ten students (seven men and three women) participated in the experiment. The subject experienced the virtual environment through the head-mounted display (HMD). Wireless intercommunication allows the subject to move freely in the virtual environment, and the specification of the experimental route can be changed according to the subject's location information. The experimental route consisted of a series of bends and T-intersections. The area at the end of the T-intersection was divided into a sidewalk and a roadway. A red ball moving at 1.7m/s was presented in this experimental route. The ball randomly entered or did not enter the roadway beyond the T-intersection. We had subjects chase a red ball and induced them to run into the roadway.A total of 16 conditions were set by combining four variables: the presence of bollards (bollards or no bollards), the presence of a motorcycle (motorcycle or no motorcycle), a ball rolling into the roadway (entry, no entry), and ball height (0.1m, 1.4m). We analyzed the change in speed and location information when the subjects ran into the roadway. In analyzing the experimental data, three analysis items were defined: "maximum deceleration," which indicates the degree of deceleration in front of the bollard, "deceleration point," which is the distance between the bollard and the position where the maximum deceleration occurred, and "safety check rate," which is the rate of head movement to pay attention to the surroundings. As a result of the verification, the following findings were obtained. The linear arrangement of bollards between the roadway and the sidewalk reduces the speed of movement in the direction of running from the sidewalk onto the roadway. The preceding effect was more strongly confirmed in the group of subjects who did not run onto the roadway. These results suggest that it is possible to encourage people to slow down by making the bollards visible from a distance.
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Slangen, Frank, Wim Bal e Mark Riemers. "An Innovative Self Installing Platform (SIP) Concept". In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-50342.
Abstract (sommario):
Centrica Energy (formerly Venture) selected a self installing and re-usable platform concept (SIP) to develop their F3FA gas field in the Northern Part of the Dutch sector of the North Sea. On 6 February 2009 and following an initial FEED study, the contract was awarded to Heerema Fabrication Group (Main Contractor and Fabricator), in partnership with Iv-Oil & Gas (Designer and Procurer of process equipment) and SPT Offshore (Installation Contractor and Foundation Designer). The platform weighed in total 8,800 ton, including a 4,000 ton deck and 4,800 ton substructure including the suction pile foundation. The water depth at the F3FA site is 41m and the bottom of the cellar deck is located at 20m above LAT. The platform has an overall dimension of 63m × 45m footprint and protrudes some 90m above the seabed (excluding vent stack). The platform concept consists basically of a deck of 5 levels supported by 4 unbraced legs (3.25m outside diameter × 77m long) and founded on 4 huge suction piles (15m outside diameter × 13m deep). The platform is transported and installed using a large flat top barge (BOA 35 measuring 124m long × 31.5m wide × 8m high) and 3 tug boats (75, 90 and 183 ton bollard pull) for the tow from HFG’s yard in Vlissingen to the F3FA site in the Dutch sector of the North Sea. The leg lowering and deck lifting was achieved using 12× 900 ton strand jacks. The suction pile foundation was installed using 4× suction pumps. During the detailed design stage of the project, the concept design was subject to several elementary changes in the structural design. This had to do with the severe environment, the increased deck weight and water depth compared to the earlier utilisation of the concept. Fatigue and transport and installation issues had a significant impact on several key structural design elements. This complicated the deck-leg connections and several members in the truss deck. The deck leg connection was amended from a simple clamp connection in to a superbolt and sleeve connection at the top deck and a clamped and grouted connection at the cellar deck. In order to improve the stiffness of the legs, leg stiffening frames were placed on top of the suction piles. Due to the limited and slow roll & pitch response of the platform whilst on the BOA barge during tow, high seafastening forces were predicted. These high seafastening forces were transferred in to the barge using pinned seafastening arms. Water depth limitations and the additional leg stiffening frames necessitated to use a fairly high grillage structure of 6.5m high. All these items changed the deck construction towards a method obstructing completion of non-structural disciplines and changed the inshore mating operation of the substructure with that topside towards a complex lifting and fitting campaign. Despite these elementary design changes and some rigorous changes in the planning of the various activities, the contract schedule was achieved in time. The above efforts had an obvious effect on the managerial issues towards the project. It required a doubling of the manning levels and engineering issues of in some cases R&D nature. Despite all these challenges and complications, the platform left Vlissingen well ahead of time, on 18 August 2010, to set sail for the F3FA site. Upon arrival in the field, the weather deteriorated severely and the tow was forced to seek shelter in Rotterdam. Just before arrival in Rotterdam severe waves were encountered up to 6–7m maximum. Upon inspection in Rotterdam, the design proved to be resilient as no signs of damage were observed. Following 10 days waiting on weather the platform was towed to the field for the second time. Installation and lifting the deck to the top elevation was achieved within a record time of 2 days and 4 hours. Thereafter the platform hook-up team continued to work on the platform including completing the deck leg connections, such as installation of superbolts at the top deck level and clamp shells, rubber pads and grout at the cellar deck level. Further hook-up work consisted of hooking up the life support systems before arrival of the drill rig on 14th October 2010. The drilling of the first well was completed early January 2011 and first gas was introduced in to the pipeline system since week 4 of 2011.
Rapporti di organizzazioni sul tema "Groupe Bolloré":
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Schmidt-Sane, Megan, Tabitha Hrynick, Jillian Schulte, Charlie Forgacz-Cooper e Santiago Ripoll. COVID-19 Vaccines and (Mis)Trust among Minoritised Youth in Ealing, London, United Kingdom. SSHAP, maggio 2022. http://dx.doi.org/10.19088/sshap.2022.010.
Abstract (sommario):
This brief explains youth perceptions of COVID-19 vaccination and outlines key considerations for engaging with and building trust among young people living in Ealing, London. Within the category of ‘young people,’ there are differences in vaccination based on age and ethnicity. This brief is based on research, including a review of the literature and in-depth interviews and focus groups with 62 youth across Ealing to contextualise youth perspectives of COVID-19 vaccination and highlight themes of trust/distrust. We contribute ethnographic and participatory evidence to quantitative evaluations of vaccine roll-out. Key considerations for addressing youth distrust regarding the COVID-19 vaccine are presented, followed by additional regional context. This work builds on a previous SSHAP brief on vaccine equity in Ealing. This brief was produced by SSHAP in collaboration with partners in Ealing. It was authored by Megan Schmidt-Sane (IDS), Tabitha Hrynick (IDS), Jillian Schulte (Case Western Reserve University), Charlie Forgacz-Cooper (Youth Advisory Board), and Santiago Ripoll (IDS), in collaboration with Steve Curtis (Ealing Council), Hena Gooroochurn (Ealing Council), Bollo Brook Youth Centre, and Janpal Basran (Southall Community Alliance), and reviews by Helen Castledine (Ealing Public Health), Elizabeth Storer (LSE) and Annie Wilkinson (IDS). The research was funded through the British Academy COVID-19 Recovery: USA and UK fund (CRUSA210022). Research was based at the Institute of Development Studies. This brief is the responsibility of SSHAP.