bluuebunny/crossref_metadata_2025_split huggingface dataset:
Model Studies for an Oceanographic Ship Derived From an Offshore Supply Vessel
Authors: Paulling J. R. , Silverman Maxwell 
Published: January 2021

During the last few years, a number of operators of oceanographic research ships have considered the Gulf Coast offshore-oil-well supply vessel type for possible conversion to a research vessel. Such a ship of 155–165 ft length offers a number of attractive features; chiefly, reduced operating costs, and space for mounting portable or interchangeable equipment. The vessel's principal disadvantages reputedly are limited stability and a lack of seakindliness. An investigation of such vessels has recently been conducted by the Scripps Institution of Oceanography and the Department of Naval Architecture of the University of California. Model experiments were conducted to determine the resistance and powering characteristics, the motions in head seas, and rolling in beam seas. The transverse stability was computed for calm water and following seas. Four different hull forms were considered in these studiesa typical 155-ft-long single-chine supply boat;a round-bilge version of the same;a single-chine design developed to overcome several of the suspected deficiencies of Form 1 while still retaining the principal proportions; andan affine variation of Form 1 produced by multiplying transverse dimensions by 0.75 and increasing vertical dimensions by the same amount.
It is concluded that the most serious deficiency of the vessel type is the tendency to slam in a head sea. This may limit the maximum speed in head seas. The small saving in resistance exhibited by both the narrower and round-bilge versions is insufficient to justify choosing either of these on this basis alone. In addition, both of these forms roll more severely than the two wide, single-chine forms. Finally, the increased freeboard of the third form results in an ample margin of stability. It is felt, therefore, that Form 3 provides a suitable basis for developing a research ship design.
Some Remarks on Model Tests With Floating Platforms in Waves
Authors: Wahab R. , van Sluijs M. F. 
Published: January 2021

This paper reviews briefly the results and problems associated with model tests in waves on moored, floating drilling platforms. It considers the analysis of the observed phenomena which is based on experience gained from several tests on these structures carried out at the Netherlands Ship Model Basin. Most parameters which affect the motions of the platform are interrelated and not independent of one another. Consequently, the effect of any given parameter is hard to distinguish and thus limits the number of design trends and behavior predictions which could be formulated. Three important tends were noted, however, and can be summarized as follows:The important platform motions with respect to drilling ease are most favorable with a deep-draft platform;the behavior in waves is relatively independent of platform displacement;the optimal section shape of the horizontal underwater structures with respect to the platform motions depends upon the expected wave periods to be encountered.
The results presented are based upon a limited number of tests and must be applied only with caution. Model tests still are the only reliable method of predicting the behavior of a proposed drilling platform.
Experience Concerning 1200-psi Naval Steam Generators
Authors: Kaune J. E. , Fritz W. A. 
Published: January 2021

At a meeting held in the Naval Ship Engineering Center, Philadelphia Division, in January and February 1967, the following were found to be the principal reasons for the 1200-psi-boiler problems:Introduction of a new type of boiler without a sufficient training program;lack of a sufficient supply parts backup;lack of adequate manuals and documentation;lack of sufficient auxiliary equipment to assist in boiler operation and maintenance, and lack of optimum design features.
This paper describes the aforementioned problems and what has been and is being done to improve conditions. An extensive program is now underway to vastly improve overall boiler reliability and decrease maintenance requirements.
The Canadian Arctic Marine Technology R&D Program: A Review
Authors: Glen I. F. 
Published: January 2021

A proposed five-year program of research and development designed to achieve technical excellence in Arctic marine transportation technology was developed for the Transportation Development Centre under contract in 1978 and published in 1979 as TP 2003. This program was developed, described, costed and had priorities set under four areas:transiting performance,hull structural integrity,propulsion systems and appendages, andhazard avoidance.
In addition, a separate full-scale demonstration program to design, construct, and operate a 90 000-ton Arctic tanker was proposed. The total program was costed at $35.75 million, with the demonstration program costed at a further $106 million. A brief review of the status of this program is presented in which the progress of Arctic marine technology in the five year period has been measured against the original proposed program. Recommendations for the future of the program are made in light of current Arctic activity, and projected activity.
Design Practice for Mooring of Floating Production Systems
Authors: Kwan C. T. 
Published: January 2021

A draft "API Recommended Practice for Design, Analysis, and Maintenance of Mooring for Floating Production Systems" was developed recently by the API Task Group on Mooring Design for Floating Structures. This document is closely related to API RP-2P, "Recommended Practice for the Analysis of Spread Mooring Systems for Floating Drilling Units." because both documents address mooring of floating units. However, this document is also different in many ways from API RP-2P because there are significant differences between a floating drilling mooring system and a floating production mooring system. Major differences of this document from API RP-2P are:The design environment is significantly more severe.Dynamic instead of quasistatic mooring analysis is recommended; tension limits are relaxed.Guidelines for thruster-assisted mooring are included.Fatigue analysis is required.
In the course of developing the Draft RP, the API Task Group has done some fundamental work to establish a rational design practice for FPS mooring systems. This paper highlights the new design practice, presents its basis, and points out areas where future work is needed.
A Review of Some Performance Characteristics of Monohull High-Speed Small Craft
Authors: Lee Charles M. 
Published: January 2021

ABSTRACT
This paper presents a review of some parametric interrelationships between size, weight, hull proportions, propulsion power, and craft speed of modern, monohull, planing-type, marine craft. Parametric relationships are presented in terms related to lifting-surface theory rather than in more conventional "naval architectural" terms such as hull volume coefficients and area coefficients. The scope of the paper includes a brief review of the technical approach used to accomplish the analysis and typical results of the work. Charts which provide a means for approximation of power/ performance relationships are also presented. Performance estimates derived by means of the charts are compared with data derived from the careful and thorough testing of several full-size craft.
A Vessel is its Own Best Lifeboat: Prevention of Casualties through Education
Authors: Miller Thomas C. , Paitl George J. 
Published: January 2021

The U.S. Coast Guard has observed the death rate for commercial fishermen decline steadily during the years following the enactment of the Fishing Vessel Safety Act of 1988. This Act called for requirements of survival equipment and fire fighting equipment, among other items, targeted at minimizing the consequences of a vessel capsize, sinking, fire or other casualty that required the crew to abandon ship. In recent years, the death rate has plateaued with minimal to no decreases and even a slight increase in 1996. While of concern, this plateau seems logical because the primary focus over the last eight to ten years has been on reducing the consequences of commercial fishing casualties (response). However, fishing vessels continue to capsize or sink before crew members are able to access survival equipment and lives are being lost. In order to continue to decrease the industry death rate, regulators and those responsible for oversight of this industry must shift the focus from reducing the consequence of casualties (response) to decreasing the likelihood of casualties occurring (prevention). This paper details the most recent initiative the U.S. Coast Guard has undertaken in its Fishing Vessel Safety Program and describes the Fishing Vessel Training Suite developed to facilitate this industry-wide education. The Training Suite consists of three trainers and a document titled, "Best Practices Guide to Vessel Stability." The three trainers include:Interactive Stability Trainer,Small Vessel Damage Stability Trainer, andSmall Vessel Damage Control Trainer.
The U.S. Coast Guard has received very positive feedback from the commercial fishing industry and lives have been saved as a result of the use of this Training Suite.
On Introducing” Section Modulus for Asymmetric Bending” of Stiffeners
Authors: Ivanov Lyuben D. 
Published: January 2021

ABSTRACT
A new geometric property of shipbuilding structural profiles is introduced to consider asymmetric bending. This is the so-called section modulus for asymmetric bending, which allows for determining the total bending stresses in the structural profile for any angle of the attached plate and any angle of the plane of the applied load. As for symmetric bending, the major assumption behind the developed procedure for calculating the section modulus for asymmetric bending is that the structural profile works as a unit, that is, independently.
Relato de possibilidades de ensino com ferramentas digitais em tempos de pandemia
Authors: Hoffmann Wesley Pinto , Guedes Sumaya Ferreira , Geraldi Claudineia Aparecida Queli , Silva Sumaria Sousa e , Lima Felicia de Araújo , Loss Raquel Aparecida 
Published: January 2021

As experiências com ensino em tempos de pandemia modificam metodologias estabelecidas e consequentemente, há reflexos na construção de aprendizados entre estudantes com a utilização de ferramentas digitais. A pesquisa foi desenvolvida com uma abordagem qualitativa, através de artigos, dissertações, livros, e quantitativa, aliando os pressupostos teóricos aos dados obtidos a partir do preenchimento das planilhas de inscrição pelos participantes de um curso. Considera-se que as ferramentas à disposição dos estudantes em modalidade assíncrona se mostram viabilizadoras de construções de conhecimentos. A educação precisa funcionar como um aporte para a transformação social e promoção da autonomia, a fim de que se desconstruam de paradigmas estabelecidos historicamente. A educação deve ultrapassar os limites acadêmicos e fortelecer a democratização dos saberes.
Prevalence and Risk Factors for Vitamin D Insufficiency among Adults with Epilepsy at University Hospital in Jeddah, Saudi Arabia: A Cross Sectional Study
Authors: Mohorjy Doaa K. , Ramadan Iman Kamal , Abalkhail Bahaa A. , Jaamal Khalid M. 
Published: January 2021

Background: Vitamin D is essential for bone physical condition, and vitamin D insufficiency may add to further autoimmune diseases, infections or even cancer. Enzyme-inducing antiepileptic drugs have been predominantly linked with osteoporosis hazard proved their impacts on vitamin D. The study aim was to determine the prevalence of vitamin D insufficiency and deficiency and the covariates associated with it among the adult epileptic patients attending King Fahd neurology outpatient clinics.
Subjects and Methods: 297 adult epilepsy patients joined this cross-sectional study at King Fahd Hospital in 2017. Vitamin D level was considered as deficiency (<10ng/ml), insufficiency (<30ng/ml), or normal (≥30ng/ml). Antiepileptic drugs were sorted out according to their enzyme inducing criteria.
Results: 87.88% adult epileptic patients were between 18 – 50 years of age, more than half were females, married, and with higher degree of education, less than half received monthly income of less than 5,000 SR, nearly two third were either smokers or ex-smokers. Multiple linear regression model for predictors of vitamin D insufficiency and deficiency declared that; enzyme induced antiepileptic drugs, polytherapy, and smoking were significantly correlated with vitamin deficiency and insufficiency (p < 0.05).
Conclusion: Vitamin D insufficiency and deficiency is widespread among adult epileptic patients. Screening of vitamin D level should be taken into consideration as part of the regular follow up of epileptic patients.
Economic Contribution to Household Dependence through Ocimum basilicum L. Cultivation: An Important Plant for Health and Livelihood Security in Kashmir Valley (J & K), India
Authors: Bhat G. M. , Majeed Huzaifa , Islam M. A. , Rashid Megna , Pala Nazir A. , Fatima Shahnaz 
Published: January 2021

The present study was conducted during the year 2018-19 in the Srinagar and Ganderbal district of Kashmir valley (J & K). The study was aimed to access the collection, consumption and economic contribution of Ocimum basilicum to household income and employment. The study was conducted using a well-structured questionnaire covering various aspects of the study. The total average yield/annum/family of Ocimum basilicum was recorded 3 kg. The average consumption/annum and sale/annum was 0.5 kg and 2.5 kg respectively. The household characteristics influencing the Ocimum basilicum livelihood in the locality averaged for the sample population indicated the preponderance of middle aged persons (55.9), low literate people (2.1) having large sized families (1.76), marginal sized landholdings (1.28), owning 6-10 livestock (1.76) were engaged mainly in agriculture (2.95) with family labour of mostly 3 members (2.45) and earning gross annual income of ₹60704.26 The total average gross income generated within the sample households was ₹450.00 with the total average net income generation of ₹379.48 and the total average employment of 11.21 man-days by a single household. The structure of household average gross annual income, consisting of all off-farm and on-farm sources among the surveyed population, was ₹60704.26 which was differentiated as horticulture (37.70%) followed by agriculture (26.13%), livestock (21.93%), service (11.31%), business (1.65), basil based cottage industry (0.74%), wage labour (0.41%) and others (0.13%). The livelihood security from Ocimum basilicum L. depends on multitude of various socio-economic factors and cultivation practices and knowledge. The extensive cultivation of this plant may have more positive impact on the livelihood of the local communities.
Smallholder Farmers’ Vulnerability to Impact of Climate Change in Central Bhutan
Authors: Rinzin Pema , Sonam Thubten , Tshering Sangay , Chapagai Purna Prasad 
Published: January 2021

Climate change carries immense threat to the livelihood and food security of smallholder farmers in Bhutan and it is therefore crucial to enhance their adaptive capacity. However, building resiliency to climate impact require information on vulnerability of the system of interest. Therefore, this study assessed smallholder farmers’ vulnerability to impacts of climate change and variability in central regions (Bumthang and Trongsa) of Bhutan. Data was collected from 247 randomly selected households by administering a pre-tested survey questionnaire. Data was analyzed using composite index approach (LVI) and IPCC framework approach (LVI-IPCC). The LVI analysis revealed that Bumthang was more vulnerable in terms of Socio-demographic profile (0.55), social networks (0.45), health (0.31) and natural disasters and climate variability (0.47) compared to Trongsa. Whereas, Trongsa was more vulnerable in terms of livelihood strategies (0.31) and water (0.13). Vulnerability score on the food component was same for both the districts (0.27). Overall, Bumthang was more vulnerable compared to Trongsa on both LVI (Bumthang: 0.36, Trongsa: 0.34) and LVI-IPCC (Bumthang: 0.24, Trongsa: 0.13) analysis. The findings could be used for designing micro-level context specific interventions to enhance smallholder farmers’ adaptive capacity to impacts of climate change in central Bhutan.
Organizational Climate at the University of Eastern Philippines Pedro Rebadulla Memorial Campus Catubig, Northern Samar
Authors: Lluz Lyra Paz P. , Basibas Aveliza T. , Estudillo Alfie E. 
Published: January 2021

This study aimed to assess organizational school climate of University of Eastern Philippines, Pedro Rebadulla Memorial Campus, Catubig Northern .Samar for school year: 2017-2018. It aimed to identify the perception of faculty towards organizational climate in terms of: Supportive Behavior; Directive Behavior ; Engaged Behavior; Intimate Behavior; and Frustrated Behavior; determine the standardized scores of organizational climate; and determine the general openness index among employees in the workplace. Moreover, this study was conducted to improve the organizational climate of the institution by getting or assessing the supportive, directive, engaged, and frustrated behavior from the respective respondents.
This study used a standardized questionnaire which is called the “Organizational Climate Description Questionnaire (OCDQ) adopted from Wayne K Hoy (1991). It is an instrument used to measure important aspects of teacher-teacher and dean-teacher interactions. Along with this, the study was designed with descriptive methodology which involves the analysis of the organizational climate of the university for the school year 2017-2018 and to determine the climate openness of the school specifically focusing on the dimensions or subtest covered by the Organizational Climate Questionnaire (OCDQ-RS).
This study found out that the organizational climate was higher than 84% of the schools from the normative samples, and the openness index of the organizational climate scored 380.9 The University falls below the average range for openness. Finally, it is recommended that the University should conduct an intervention on how improve the openness index of the organizational climate.
Global Trends of Emerging Infectious Diseases and the Impacts on Biodiversity: Spillover, Diversity and the Role of Bats in Evolutionary Relationships as Zoonotic Virus Reservoirs
Authors: Júnior Diniz Pereira Leite , Dantas Elisangela Santana de Oliveira , Costa Gisela Lara da , Pereira Ronaldo Sousa , Bonci Mário Mendes , Ramos Regina Teixeira Barbieri , Pires Rodrigo Antônio Araújo , Melhem Marcia de Souza Carvalho , Felippe Paulo Anselmo Nunes , Paula Claudete Rodrigues 
Published: January 2021

Introduction: It is possible that the evolution of man is associated with manifestations of microscopic beings that have accompanied him since ancient times. Emerging infectious diseases have been warning for decades that habitat fragmentation and degradation, antropization effects, animal trafficking increase the risk of diseases spreading from wildlife to human populations.
Aims: The purpose of this study was to review the current events about the pandemics that occurred on the planet and the current situation of bat involvement, their high degree of ecological plasticity that these beings present with the emergence and spread of viruses.
Methodology: Review the current knowledge about viral diversity, host condition and possible mammalian reservoirs in the face of pandemics and the close relationship of bats with humans and other possibly incriminated species. Given the epidemics of the last century, it is possible to observe that the increased interaction between humans and wild animals has facilitated the emergence of viral strains of importance for public health.
Results: Given the reports argued by the scientific community, bats may be responsible for the air cycle of viral diseases, being considered of great importance in the study of epidemiology. Conclusion: The SARS-CoV-2 epidemic has come to test the ability of humans to face a threat that may be repeated in the future. As part of nature, bats cannot be framed as precursors of viral agents. The knowledge obtained, associated with investment in science, research and education, will put us one step ahead of future pandemic events.
Unlocking a closed system: dosimetric commissioning of a ring gantry linear accelerator in a multivendor environment
Authors: Saini Amarjit , Tichacek Chris , Johansson William , Redler Gage , Zhang Geoffrey , Moros Eduardo G. , Qayyum Muqeem , Feygelman Vladimir 
Published: January 2021

AbstractThe Halcyon™ platform is self‐contained, combining a treatment planning (Eclipse) system TPS) with information management and radiation delivery components. The standard TPS beam model is configured and locked down by the vendor. A portal dosimetry‐based system for patient‐specific QA (PSQA) is also included. While ensuring consistency across the user base, this closed model may not be optimal for every department. We set out to commission independent TPS (RayStation 9B, RaySearch Laboratories) and PSQA (PerFraction, Sun Nuclear Corp.) systems for use with the Halcyon linac. The output factors and PDDs for very small fields (0.5 × 0.5 cm2) were collected to augment the standard Varian dataset. The MLC leaf‐end parameters were estimated based on the various static and dynamic tests with simple model fields and honed by minimizing the mean and standard deviation of dose difference between the ion chamber measurements and RayStation Monte Carlo calculations for 15 VMAT and IMRT test plans. Two chamber measurements were taken per plan, in the high (isocenter) and lower dose regions. The ratio of low to high doses ranged from 0.4 to 0.8. All percent dose differences were expressed relative to the local dose. The mean error was 0.0 ± 1.1% (TG119‐style confidence limit ± 2%). Gamma analysis with the helical diode array using the standard 3%Global/2mm criteria resulted in the average passing rate of 99.3 ± 0.5% (confidence limit 98.3%–100%). The average local dose error for all detectors across all plans was 0.2% ± 5.3%. The ion chamber results compared favorably with our recalculation with Eclipse and PerFraction, as well as with several published Eclipse reports. Dose distribution gamma analysis comparisons between RayStation and PerFraction with 2%Local/2mm criteria yielded an average passing rate of 98.5% ± 0.8% (confidence limit 96.9%–100%). It is feasible to use the Halcyon accelerator with independent planning and verification systems without sacrificing dosimetric accuracy.