North Wind 4kW passive control system design

An overview of a mechanical rotor control design is presented. Operation at constant RPM and rapid response are obtained by using blade pitch moments for both sensing control need and blade pitch actuation. The basic concept, static or equilibrium design, and dynamic analysis are briefly presented

Community Benefits and Lessons for Local Engagement in a California Open Streets Event: A Mixed-Methods Assessment of Viva CalleSJ 2018

This report presents the findings from an evaluation of the September 2018 Viva CalleSJ open streets event in San José,CA. The research was designed to assess the success of the event, guide planning for future open streets events, and inform potential funders and community partners about the benefits of such events. To gather the impressions of participants, local residents, and workers at businesses along the event route, the mixed-methods study analyzed results from a survey of 1,571participants, 114 interviews with community members and businesses, and participant observations. Researchers also examined social media presence and a related augmented reality gaming component. The study found that Viva CalleSJ 2018 participants were resoundingly positive about their experience. Many said that the event brought people together from across the city and inspired a sense of community and civic pride, and the majority of participants benefited from at least one hour of physical activity. Most local businesses and residents viewed the event positively as well, and many food and beverage outlets appeared to benefit from increased patronage during the event. However, some shop keepers along the event route and residents in surrounding neighborhoods were not aware of Viva CalleSJ in the weeks prior to it happening or did not have a clear understanding of how it might impact them. Some were wary of the road closures and in some cases were ultimately frustrated by what they perceived to be negative impacts on their businesses

Reliable solid-state circuits Semiannual report no. 2, Jun. 1 - Nov. 30, 1965

Pulse width modulator and other microminiaturized electronic equipment for space age application

Biogeographic analysis of the Tortugas Ecological Reserve: Examining the refuge effect following reserve establishment

Almost 120 days at sea aboard three NOAA research vessels and one fishing vessel over the past three years have supported biogeographic characterization of Tortugas Ecological Reserve (TER). This work initiated measurement of post-implementation effects of TER as a refuge for exploited species. In Tortugas South, seafloor transect surveys were conducted using divers, towed operated vehicles (TOV), remotely operated vehicles (ROV), various sonar platforms, and the Deepworker manned submersible. ARGOS drifter releases, satellite imagery, ichthyoplankton surveys, sea surface temperature, and diver census were combined to elucidate potential dispersal of fish spawning in this environment. Surveys are being compiled into a GIS to allow resource managers to gauge benthic resource status and distribution. Drifter studies have determined that within the ~ 30 days of larval life stage for fishes spawning at Tortugas South, larvae could reach as far downstream as Tampa Bay on the west Florida coast and Cape Canaveral on the east coast. Together with actual fish surveys and water mass delineation, this work demonstrates that the refuge status of this area endows it with tremendous downstream spillover and larval export potential for Florida reef habitats and promotes the maintenance of their fish communities. In Tortugas North, 30 randomly selected, permanent stations were established. Five stations were assigned to each of the following six areas: within Dry Tortugas National Park, falling north of the prevailing currents (Park North); within Dry Tortugas National Park, falling south of the prevailing currents (Park South); within the Ecological Reserve falling north of the prevailing currents (Reserve North); within the Ecological Reserve falling south of the prevailing currents (Reserve South); within areas immediately adjacent to these two strata, falling north of the prevailing currents (Out North); and within areas immediately adjacent to these two strata, falling south of the prevailing currents (Out South). Intensive characterization of these sites was conducted using multiple sonar techniques, TOV, ROV, diver-based digital video collection, diver-based fish census, towed fish capture, sediment particle-size, benthic chlorophyll analyses, and stable isotope analyses of primary producers, fish, and, shellfish. In order to complement and extend information from studies focused on the coral reef, we have targeted the ecotone between the reef and adjacent, non-reef habitats as these areas are well-known in ecology for indicating changes in trophic relationships at the ecosystem scale. Such trophic changes are hypothesized to occur as top-down control of the system grows with protection of piscivorous fishes. Preliminary isotope data, in conjunction with our prior results from the west Florida shelf, suggest that the shallow water benthic habitats surrounding the coral reefs of TER will prove to be the source of a significant amount of the primary production ultimately fueling fish production throughout TER and downstream throughout the range of larval fish dispersal. Therefore, the status and influence of the previously neglected, non-reef habitat within the refuge (comprising ~70% of TER) appears to be intimately tied to the health of the coral reef community proper. These data, collected in a biogeographic context, employing an integrated Before-After Control Impact design at multiple spatial scales, leave us poised to document and quantify the postimplementation effects of TER. Combined with the work at Tortugas South, this project represents a multi-disciplinary effort of sometimes disparate disciplines (fishery oceanography, benthic ecology, food web analysis, remote sensing/geography/landscape ecology, and resource management) and approaches (physical, biological, ecological). We expect the continuation of this effort to yield critical information for the management of TER and the evaluation of protected areas as a refuge for exploited species. (PDF contains 32 pages.

Integrated Ground Operations Demonstration Units Testing Plans and Status

Cryogenic propellant loading operations with their associated flight and ground systems are some of the most complex, critical activities in launch operations. Consequently, these systems and operations account for a sizeable portion of the life cycle costs of any launch program. NASA operations for handling cryogens in ground support equipment have not changed substantially in 50 years, despite advances in cryogenics, system health management and command and control technologies. This project was developed to mature, integrate and demonstrate advancement in the current state of the art in these areas using two distinct integrated ground operations demonstration units (GODU): GODU Integrated Refrigeration and Storage (IRAS) and GODU Autonomous Contro

Businesses Going Green: An Analysis of the Factors that Motivate Firms to Adopt Environmentally Friendly Practices

The purpose of this analysis is not to degrade environmentally friendly efforts by firms, but rather to explore their motivations for adopting such sustainable initiatives. Current research would suggest that businesses are motivated to adopt environmentally friendly practices by a combination of legal requirements, corporate social responsibility, and gaining some sort of businesses advantage such as reduced costs, increased market share, and similar financial benefits. Determining what it is that contributes to a firm\u27s decision making process can have several positive implications. It may help a firm to better address the changing needs of an evolving society, the government to more effectively propose relevant legislation, and consumers to more accurately understand their role in the business process. The present study first presents a review of the relevant literature on motivations in adopting sustainable behaviors, summarizing with key hypotheses to be tested in the current research. The research methodology is described, and analytical process discussed. Finally results are presented and a discussion of their implications is noted

Businesses Going Green: An Analysis of the Factors that Motivate Firms to Adopt Environmentally Friendly Practices

In general, businesses are increasingly putting substantial weight on adapting their practices in order to become more environmentally friendly. This article aims to discover the primary factor motivating this shift. Current scholarship, when read together, suggests that there is no one answer, but rather that businesses are motivated by a combination of complying with laws and regulations, being a responsible corporate citizen and gaining an advantage that will result in increased profitability. This article explores why a company may be motivated by each of these three factors to adopt environmentally friendly practices and explains how these factors are interrelated. A content analysis of shareholder reports from various companies on the 2010 Dow Jones Sustainability Index (DJSI) is conducted and analyzed to determine what it is CEOs are saying about their sustainable efforts, then the reasons for variance among these responses are examined

Ongoing monitoring of Tortugas Ecological Reserve: Assessing the consequences of reserve designation

Over the past five years, a biogeographic characterization of Tortugas Ecological Reserve(TER) has been carried out to measure the post-implementation effects of TER as a refuge for exploited species. Our results demonstrate that there is substantial microalgal biomass at depths between 10 and 30 m in the soft sediments at the coral reef interface, and that this community may play an important role in the food web supporting reef organisms. In addition, preliminary stable isotope data, in conjunction with prior results from the west Florida shelf, suggest that the shallow water benthic habitats surrounding the coral reefs of TER will prove to be an important source of the primary production ultimately fueling fish production throughout TER. The majority of the fish analyzed so far have exhibited a C isotope signature consistent with a food web which relies heavily on benthic primary production. Fish counts indicate a marked increase in the abundance of large fish (>20 cm) within the Reserve relative to the Out and Park strata, across years. Faunal collections from open and protected soft bottom habitat near the northern boundary of Tortugas North strongly suggest that relaxation of trawling pressure has increased benthic biomass and diversity in this area of TER. These data, employing an integrated Before - After Control Impact (BACI) design at multiple spatial scales, will allow us to continue to document and quantify the post-implementation effects of TER. (PDF contains 58 pages

Transformation of paradise: geographical perspectives on tourism development on a small Carribbean island (Utila, Honduras)

This thesis addresses the recent development of tourism on Utila, the westernmost island of the Bay Islands of Caribbean, Honduras. Especially during the 1990s, international tourists, mostly Europeans and North Americans, were attracted to the island because it was a relatively inexpensive place to dive on a beautiful fringing reef and to enjoy other benefits of a tropical beach community. Larger nearby islands, Roatán and Guanaja, had developed something of a tourism industry earlier. A review of the economic and culture history of Utila reveals that modern islanders -- English-speaking Anglo- and Afro-Caribbeans originally from the Cayman Islands were preadapted for international tourism. Previously, they had interacted with the international community through the fruit trade and merchant sailing. Returning islanders enjoyed a laid back lifestyle which was also appealing to tourists. Because Utila has been a relatively cheap spot for tourists, it first attracted a backpacker type and when Europeans seeking cheap diving and drugs discovered the island, its reputation as a preferred destination attracted this lower level of the tourist types. As the tourism industry matured, interest in up-scale faculties has increased and a few small resorts have been constructed. At the moment, construction of an international airport, access roads to resort areas, and other large scale alterations of the landscape are locally severe and might be expected to seriously affect the island\u27s environmental stability. Another source of significant environmental and culture change are the Spanish-speaking Hondurans from the mainland, who have been attracted to Utila by the island\u27s reputation as a place of developing tourism and economic prosperity