检索结果-内蒙古大学图书馆

UNDERWATER INSPECTION FOR WELDING AND OVERHAUL

NAVAL ENGINEERS JOURNAL 1993年第5期105卷 37-42页

作者： MITTLEMAN, J SWAN, L John Mittleman:is a mechanical engineer at the Naval Surface Warfare Center Dahlgren Division Coastal Systems Station in Panama City Florida. His Primary Responsibilities are in the development of underwater nondestructive testing equipment for use by fleet divers and inspectors. He also performs research in the characterization of metal microstructure through ultrasonic scattering measurements. Mr. Mittleman received his BS from Cornell University in 1969 and science master's in ocean engineering from the Massachusetts Institute of Technology in 1970. His research currently supports doctoral studies with Iowa State University. Mr. Mittleman received the American Society of Naval Engineer's Solberg Award in 1981 for his contributions to underwater ship hull inspection. Mr. Mittleman is a member of ASNE ASNT ASTM IoD Sigma Xi Tau Beta Pi and Phi Kappa Phi. Lisa Swan:is a mechanical engineer at the Naval Surface Warfare Center in Panama City Florida. She is involved in nondestructive testing engineering primarily in the underwater arena. Ms. Swan holds a bachelor of science in materials engineering from North Carolina State University. She is a graduate of the Federal Women's Executive Leadership Program. Ms. Swan is a member of ASNT.

Significant progress has been made in making underwater ultrasonic thickness gauging and magnetic particle inspections available to the fleet. Under sponsorship from the Naval Sea Systems Command, Director of Ocean engineering, Underwater Ship Husbandry Division (NavSea 00C5), the Coastal Systems Station has developed complete hardware packages supporting these two nondestructive test methods, and has introduced them to military inspectors at a shore intermediate maintenance activity, a destroyer tender, and a naval shipyard. Performance trials conducted prior to taking the systems to the field have been accepted by NavSea, Ships' Concepts Group, Materials Subgroup, Metals Division (NavSea 5142) as evidence that these inspections can reliably be performed underwater. Avenues for certifying specially trained divers and inspectors are being developed;for the first time the Navy will have all of the elements in place for underwater inspections satisfying the requirements of Mil-Std-271 (Requirements for Nondestructive Testing Methods) and the Naval Ships' Technical Manual Chapter 074. Underwater ultrasonic thickness gauging has also been slated for use in the fleet, as data from laboratory and field trials have consistently shown that reliable results can be obtained by a team comprising a certified topside inspector and a diver. In tests performed at the Ship Repair Facility (SRF), Yokosuka, underwater readings were compared to those taken in dry dock by SRF inspectors, and independently by contract inspectors. On the basis of approximately 800 locations, differences between the data sets were found to be randomly distributed, with a standard deviation on the order of 0.02''. This level of accuracy is largely sufficient to distinguish plate which will need replacement during overhaul, or plate which is thick enough to weld on.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Mangrove Conservation Opportunity at Southern Coast of Bangkalan-East Java, Indonesia

引用

IOP Conference Series: Earth and Environmental science 2020年第1期557卷

作者： M K Wardhani D M Rosyid H D Armono Doctoral Program Department of Ocean Engineering Faculty of Marine Technology Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya 60111 Indonesia Department of Marine Science Faculty of Agriculture Trunojoyo University Madura Raya Telang PO BOX 2 Kamal Bangkalan 69162 Indonesia Department of of Ocean Engineering Faculty of Marine Technology Institut Teknologi Sepuluh Nopember Kampus ITS Sukolilo Surabaya 60111 Indonesia

Mangrove ecosystems are resources of landscapes, flora, fauna, and local communities that interact with each other. Mangrove ecosystems have important ecological, economic and social functions for coastal development. Conservation is a means of involving the community in mangrove recovery and management activities as a preservation effort. This paper examines the potential of mangrove ecosystems in the southern coast of Bangkalan as a conservation area. The fact, mangrove ecosystems have a pressure that decreased area significantly. Data collection used the quadratic transect method and satellite image analysis. Mangroves on the southern coast of Bangkalan have increased area over the past 10 years. Mangrove vegetation found consisted of 4 families and 8 species. There are also found fauna i.e. insects, snakes, primates and birds. The observations indicated that conservation of mangrove forests on the southern coast of Bangkalan needs to be done. This effort can be supported by ecotourism activities which are expected to improve the community welfare.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Identification of Groundwater Potential Zones in Samendeni Watershed in Sedimentary and Semi-Arid Contexts of Burkina Faso, Using Analytic Hierarchy Process (AHP) Method and GIS

引用

American Journal of Climate Change 2023年第1期12卷 172-203页

作者： Sadraki Yabre Youssouf Koussoubé Sauret Élie Serge Gaëtan Nicaise Yalo Stephen Silliman West African Science Service Centre on Climate Change and Adapted Land Use (WASCAL) Doctoral Research Program in Climate Change and Water Resources Institut National de l’eau Université d’Abomey Calavi Cotonou Bénin Laboratoire Géosciences et Environnement (LaGE) Département des Sciences de la Terre Université Joseph KI-ZERBO/Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Ouagadougou Burkina Faso Centre National de Recherche Scientifique et Technologique Institut de l’Environnement et de Recherches Agricoles-Département Gestion des Ressources Naturelles/Systèmes de Productions DRREA-Ouest Station de Farako-ba Bobo-Dioulasso Burkina Faso Laboratoire d’Hydrologie Appliquée (LHA) Institut National de l’eau Université d’Abomey Calavi Cotonou Bénin School of Science Technology Engineering and Math Trevecca Nazarene University Nashville Tennessee USA

Demand for water increases in Samendeni regarding the undertaken agricultural projects while pressure on surface water from global warming/evapotranspiration also increases. Thus, the need to evaluate the groundwater potential in the catchment is crucial as alternative supplier of water and resilience to climate hazards. The AHP was performed integrating ten influencing factors such as geomorphology, geology, soil, land use/land cover (lulc), slope, rainfall, drainage density, borehole rate & depth and piezometric level to generate groundwater potential zones (GWPZs) in Samendeni watershed (4420 km²). All the factors were processed and ranged into five (5) classes. Weight was assigned to each class of thematic layer. These thematic layers were then reclassified based on the normalized weight to be used in the calculation of groundwater potential zones (GWPZ). The final output, groundwater potential map, revealed a significant groundwater potential with very good (11%), good (31%), moderate (30%), poor (20%), and very poor (8%) of proportion. The interesting (very good, good) GWPZs in the study area are mostly in the central towards the east. The poor zones in term of groundwater potential are concentrated in the upper west region of the watershed. Besides the cross-validation with the relationship between different groundwater potential zones and the wells available in the study area, the overall accuracy was estimated to 88% provided from the result of the similarity analysis where 22 out of the 25 validation wells match with the expected yield classes of GWPZs. The statistics from that validation revealed the performance of AHP method to delineate groundwater potential zones at catchment level.

关键词： Climate Change Resilience Groundwater Potential Water Management Conjunctive Use AHP GIS Samendeni Watershed

来源：评论

学校读者我要写书评

暂无评论

Architecting a missile system for navy theater ballistic missile defense

引用

NAVAL ENGINEERS JOURNAL 1997年第3期109卷 373-380页

作者： Patel, A Kjos, K Sasso, F Robinson, S Anant Patel:is senior project engineer for the Standard Missile LEAP Progrma (desgnated SM-X) in the Standard Missile/Vertical Launch System Program Office (PMS 422) of the Navy's Program Executive office for Theater Air Defense (PEO TAD). He is responsbile for the integration and test of the SM-X missile including the third stage rocket motor (TSRM) and the kinetic warhead (KW) assemblies. He received his bachelor of science in electrical engineering from the University of Pittsburgh in 1985 Prior to joining PMS 422 he was the project engineer for the shipboard targeting system used during the Terrier LEAP technology demonstration program. he was also tht project manager for the installation and integration of the new threat upgrade (NTU) and cooperative engagement capabilities (CEC) aboard USS Kidd (DDG 993) the first ship to receive CEC during its development test phase. Mr. Patel's other assignments as NTU development lead engineer uncluded providing development and technical direction for modifications to the NTU engagement system for Standard Missile II and III/IIIA compability. kathrin Kjos:is the program development team leader for Hughes Missile Systems Company. She worked on the initial flight demonstraction phase of the program integrating the kill vehicle and advanced solid axial stage into the SM2 Block III ER missile and served as co-chair of the System Safety Working Group. She has thirteen years of experience in system engineering. Previous experience includes missile systems engineering for the Advanced Air-to-Air Missile (AAAM) as well as for laser and radar surveillance systems. She has a bachelor of science degree in chemical engineering from the Illinois Institute of Technology a master of science degree in system engineering from the University of Southern California and is currently a doctoral candidate in systems architecting at the University of Southern California. Felix Sasso is a member of technical staff 11 at Hughes Missile System Company. He has three years of experience in op

While most of the theater ballistic missiles (TBM) in threat countries' inventories are of the shorter range SCUD varieties, mid- to long-range versions are currently in development in a number of third world countries. Threat potential exists in the following three battle spaces: endo-atmosphere (0-30 km), high endo-atmosphere (30-70 km) and exo-atmosphere (greater than 70 km). The inherent short range and low speed of endo-atmospheric threats match well with capabilities of SM-2 Block IVA, which equips the Navy with an area defense capability The exo-atmospheric TBMs are longer range and can threaten more targets which may be widely dispersed. Their higher velocities reduce response times dramatically Therefore, exo-atmospheric TBMs create the need for Standard Missile-3 (SM-3), which provides the Navy with theater wide defense capability. Defining its area and theater wide systems as clearly endo-atmospheric and exo-atmospheric systems allows the Navy to use derivatives of the Standard Missile Block IV to take full advantage of the conditions associated with each of these operating zones. Use of an existing missile and ship system baseline also allows use of the existing interface structure to minimize cost. To counter the endo-atmospheric TBMs, the SM-2 BLK TVA upgrades include an advanced imaging infrared (IIR) seeker, an improved fast-reaction auto pilot and a forward looking RE all in the same volume as the existing missile. The highly responsive SM-2 Block IVA missile, complemented with Aegis weapons systems modifications, provides capability against enemy aircraft and cruise missiles, as well as TBMs. Standard Missile-3 (SM-3) replaces the SM-2 Block TV warhead, radar and guidance section with a boosted third stage and an advanced kinetic warhead (KW). Operation in the exo-atmospheric region permits a KW design with autonomous guidance control and divert thrusters for high maneuverability and has the capability of achieving very high interceptor velocities.

关键词： Missiles

来源：评论

学校读者我要写书评

暂无评论

Tourism vulnerability management to support local wisdom conservation in the current agriculture practices (Case: Agricultural tourism area in Ngawi Regency, East Java, Indonesia)

引用

IOP Conference Series: Earth and Environmental science 2021年第1期824卷

作者： B Pujiasmanto I Aliyah N Miladan R Sugiarti Margana D Setyaningrum Department of Agrotechnology Faculty of Agriculture Universitas Sebelas Maret Surakarta Indonesia Department of Regional and Urban Planning Engineering Faculty Universitas Sebelas Maret Surakarta Indonesia Research and Development Centre of Tourism and Culture Research and Community Service Institute Universitas Sebelas Maret Surakarta Indonesia Doctoral Program of Agricultural Science Faculty of Agriculture Universitas Sebelas Maret Surakarta Indonesia

Climate change can cause an increase in the earth's surface temperature and atmospheric CO2. This has an impact on the tourism area based on local agricultural wisdom. The research aims to analyze the level of tourism vulnerability management and formulate tourism vulnerability management strategies to support local wisdom preservation in current farming practices. The method used is mapping, field observations, and interviews with two approaches, namely quantitative content analysis and qualitative content analysis. The results showed that the farming community was only profit-oriented without paying attention to balancing and preserving the natural environment. Most farmers want all agricultural processes to be done instantly or quickly, with higher yields. However, they leave local wisdom values and socio-cultural contexts in managing the rice field environment. One of the components of local wisdom that can still be maintained is the cropping pattern primarily found in the highlands that can still be found. To manage the vulnerability of tourism to support the preservation of local wisdom in current agricultural practices.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Community behavior and single-use plastic bottle consumption

引用

IOP Conference Series: Earth and Environmental science 2019年第1期293卷

作者： A Khoironi S Anggoro S Sudarno Doctoral Program of Environmental Sciences Diponegoro University Jl. Imam Bardjo SH-Semarang Semarang 50241 Indonesia Faculty of Fisheries and Marine Science Diponegoro University Jl. Prof Soedarto SH-Tembalang Semarang 50271 Indonesia Department of Environmental Engineering Diponegoro University Jl. Prof Soedarto SH-Tembalang Semarang 50271 Indonesia

Since plastic is considered as environmentally hazardous material, various programs aimed at educating the community on the impact of plastics pollution and consumption have been continuously conducted. Furthermore, the relationship between culture and community behavior regarding single-use plastic bottle consumption is important to be investigated for mitigating plastics pollution. The purpose of the current research was to investigate the quantity of single-use polyethylene terephthalate (PET)-based plastic bottles are used daily and how communities are managing them in the waste stream. The data was collected from the family members of 100 households of various educational, social, economic, age, and lifestyle backgrounds. About seven local companies that work in plastic waste collection were also important participants in the data collection regarding plastics consumption. The study showed that almost 80 % of households reported one to four single-use plastic bottles consumed each day while the remaining 20 % used more than four single-use plastics bottles daily. From 88 respondents, only 10 % separated plastic bottles in their trash disposal. The result also showed that the increasing use of single-use plastic bottles are highly influenced by the behavior of the local community in plastics consumption and waste management.

关键词：

来源：评论

学校读者我要写书评

暂无评论

From Dissemination to Propagation: A New Paradigm for Education Developers

引用

Change 2017年第4期49卷 35-42页

作者： Froyd, Jeffrey E. Henderson, Charles Cole, Renée S. Friedrichsen, Debra Khatri, Raina Stanford, Courtney Jeffrey E. Froyd is a Research Professor at Texas A&M University. His research interests include sustained adoption of improvements in learning and teaching systematic reviews in engineering education evaluation of faculty campus climates and assessment of complex learning outcomes. Charles Henderson is a Professor at Western Michigan University with a joint appointment between the Department of Physics and the Mallinson Institute for Science Education. His research focuses on promoting productive changes in higher education at the individual department institution and national levels. Renée S. Cole is an Associate Professor of Chemistry at the University of Iowa. She teaches introductory and advanced courses in chemistry and runs a research program focused on the design and assessment of instructional materials and teaching strategies and faculty professional development. Debra Friedrichsen founded and operates a small consulting company. She received her Ph.D. from Oregon State University in Chemical Engineering with a dissertation focused on engineering education. Debra also has a MBA a MS and a patent for sensor development. Raina Khatri is a doctoral student in the Mallinson Institute for Science Education at Western Michigan University. Her research focus is understanding how education developers in STEM can promote sustained adoption of their innovations. Courtney Stanford is a postdoctoral researcher in the Department of Chemistry at Virginia Commonwealth University. Her current research focuses on the identification development and assessment of process skills (also known as professional skills) in active learning undergraduate STEM classrooms.

Scholarly studies and national reports document failure of current efforts to achieve broad, sustained adoption of research-based instructional practices, despite compelling bodies of evidence supporting efficacy of many of these practices. The authors of this paper argue that many change agents who are working to promote systemic adoption of these teaching practices use approaches that are characterized by what the authors call the "dissemination paradigm." A dissemination paradigm characterizes patterns of these current, failing efforts. Change agents, working within the dissemination paradigm, try to convince adopters that their innovations can help their students. Efforts within the dissemination paradigm have not led, and are unlikely to lead, to systemic adoption. The authors offer the "propagation paradigm" as an alternative with the potential to produce improved results. Change agents, working within the propagation paradigm, engage with adopters early and often to understand their instructional systems and interactively develop a strong product adaptable to specific contexts.

关键词： Models Change Agents Teaching Methods Information Dissemination Educational Innovation Instructional Systems STEM Education Comparative Analysis

来源：评论

学校读者我要写书评

暂无评论

Implementation of Fuzzy-based Model for Prediction of Thalassemia Diseases

引用

Journal of Physics: Conference Series 2021年第1期1751卷

作者： E. R. Susanto A. Syarif K Muludi R. R. W. Perdani A. Wantoro Doctoral Program of Mathematics and Science Faculty Lampung University. Jl. Sumantri Brojonegoro No 1 Bandar Lampung Indonesia. Faculty of Engineering and Computer Science Universitas Teknokrat Indonesia. Jl. ZA. Pagaralam No.9-11 Bandar Lampung Indonesia. Department of Computer Science Faculty of Mathematics and Science University of Lampung. Jl. Sumantri Brojonegoro No 1 Bandar Lampung Indonesia. Faculty of Medical Science Lampung University. Jl. Sumantri Brojonegoro No 1 Bandar Lampung Indonesia

Thalassemia is known as one of the blood disorder diseases that is inherited by parents. There are several types of Thalassemia, namely as Thalassemia major, minor, and intermedia. Among them, Thalassemia major is the most dangerous and needs more attention. Generally, it can be detected since the child is one year old. Late detection of this disease can have adverse consequences and various complications. This study aims to develop a new model for the prediction of thalassemia for children. The model adopts a fuzzy-based rule. The novelty in this article is that our model has 4 outputs, namely thalassemia major, intermedia, minor and not thalassemia. In the previous article it only had 3 outputs. In this study, we intend to implement a model that we developed using a fuzzy-based approach to classify thalassemia diseases based on CBC data. This article describes how to build a model and implement it in software. We compare the test results with the opinion of pediatricians regarding thalassemia. The final results of testing 4 CBC data show that our proposed model has successfully identified the type of thalassemia.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Molasses fermentation using K2 isolate immobilized by calcium alginate for ethanol production

引用

AIP Conference Proceedings 2024年第1期2970卷

作者： Getari Kasmiarti Hermansyah Claudia Indah Cantika Ferlinahayati Miksusanti Poedji Loekitowati Hariani Novia Doctoral Program of Environmental Science Graduate Program Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Sriwijaya Jl. Padang Selasa No.524 Bukit Besar Palembang City 30139 South Sumatra Indonesia

Molasses has a high sugar content and potentially good to be used as a fermentation substrate in the production of ethanol. The main purpose of this study is to compared the ethanol yield between free and immobilized on calcium alginate as the agent of fermentation. The fermentation of molasses was carried out directly using yeast isolate K2 which was free and immobilized on calcium alginate. Isolate K2 was tested physiologically first to determine the character of its tolerance to NaCl, pH, and molasses. The physiological character of isolate K2 showed its ability to grow at the limit of 12% NaCl, pH 3-6, and 25% molasses concentration at 30°C. The highest ethanol content was 1.96% from 25% molasses concentration with 24 hours fermentation using immobilized K2 isolate while the lowest ethanol content was 0.42% from 24 hours fermentation time using free yeast. Substantially, it can be concluded that the immobilization of K2 isolate in calcium alginate has the potential to increase the production of ethanol from molasses.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Reverse electrodialysis membrane for harvesting salinity gradient energy with and without spacer under natural wetland water

引用

AIP Conference Proceedings 2023年第1期2932卷

作者： Muthia Elma Dwi Resa Lamandau Siti Fatimah Satria Anugerah Suhendra Aulia Rahma Department of Chemical Engineering Faculty of Engineering Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia Materials and Membranes Research Group (M2ReG) Lambung Mangkurat University Jl. A. Yani KM 36 Banjarbaru 70714 Indonesia Environmental Science Doctoral and Postgraduate Program Lambung Mangkurat University Jl. Brigjen H. Hasan Basry Banjarmasin 70123 Indonesia

Salinity gradient energy (SGE) allows two solutions with different salt concentration to mixing and directly into electrical energy by reverse electrodialysis (RED) membrane. High power outputs are forecasted theoretically, but in real practice is still relatively low RED power efficiency. In this work, the spacer shadow effects on both membrane and solution compartment resistances are investigated by employing nylon spacer and without spacer. In addition, this experiment also proposes the power density performance of RED membrane under natural wetland water as low saline solution and variation of high saline solution i.e., artificial brackish water (0.3 wt% NaCl) and artificial seawater (3.5 wt% NaCl). The results indicate that the spacer shadow effect on RED membrane has a correlation with energy output generated. The used of spacer led to an increase in stack resistance and decrease in power density compared to without nylon spacer. This result increases the impact of RED renewable power source and brings it closer to practical implementation, especially for the potential natural wetland water as low saline solution. The power output was computed, obtaining a maximum power density of 0.19 W/m2 with variations without spacers, and 0.14 W/m2 with spacers. Results show that of the cell components directly influences the physicochemical principles governing the RED process and is closely related to the cell output parameters. In turn, it is possible to increase the performance of a RED cell by optimizing operation without spacers to avoid the shadow effect.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：