41530 research outputs found
Sort by
Design Of A Dynamic, Reconfigurable, Self-Balancing Battery Pack
Get PDFThis thesis details the design and testing of a reconfigurable battery array. Reconfigurable battery arrays, specifically for mobile applications, have the potential to reduce or eliminate use of auxiliary charging, balancing, and inverter systems. Design work included a bidirectional solid state switch and a cell-to-cell bidirectional current-limiting power converter. While the overall efficiency, size, and cost of the battery pack was not competitive with existing options, it demonstrated cell-to-cell balancing and native four-level square wave AC inverter output with an array of only two cells. This demonstrates viability of the concept as well as reveals important requirements and safety features for future development of reconfigurable battery arrays
Filipino Citizen Planners in Stockton & San Francisco, California: Little Manila Rising (LMR) & South of Market Community Action Network (SOMCAN)
Get PDFCitizen planners are direct representatives of their communities, “often working without formal position, a title, or support from the state” (Beard, 2012, p. 708). The purpose of this project is to enrich the existing literature of planning history, by including stories of citizen planners. And acknowledging them as key actors in building equitable communities. This project asserts the importance of local knowledge and citizen empowerment when it comes to successfully developing community.
This project follows the story of two Filipino citizen planner organizations. One is in Stockton, named Little Manila Rising (LMR) which is located in South Downtown Stockton. The other Filipino citizen planning organization is in San Francisco, named the South of Market Community Action Network (SOMCAN). SOMCAN is located in the South of Market District of San Francisco. This project follows how LMR and SOMCAN utilize community-based planning and radical planning techniques to challenge spatial marginalization in their cities. And how they\u27ve expanded their grassroots efforts to provide community services and reclaim space by planning to shape their urban environment. This project also divulges into two community-based urban plans developed through the partnership of citizen and city planners: Stockton’s “Gleason Commercial Master Development Area Proposal” (2003) and San Francisco’s ” Cultural History Housing & Economic Sustainability Strategy Report” (2022) for the “SOMA Pilipinas Filipino Cultural Heritage District
How Does A Pup Recognize Its Mother? Vocal Recognition And Individuality Of Pup Attraction Calls In Northern Elephant Seals (Mirounga Angustirostris)
No full textMutual parent-young recognition is vital for offspring survival, particularly in species congregating in dense breeding sites, like pinnipeds (seals, sea lions, and walruses). For effective vocal recognition, the caller must produce individually specific calls with high levels of stereotypy, or individuality. Vocal recognition has been studied extensively and is well-documented in otariid species (fur seals and sea lions), as those mothers frequently leave their pup to forage and must relocate them upon return to the rookery. In many phocid (true seal) species, the mothers typically remain with their pup throughout nursing and therefore may not have as strong of a need for well-developed vocal recognition; recognition remains understudied in these species. This study focuses on vocal recognition and individuality in the northern elephant seal (Mirounga angustirostris), a phocid species with a 28-day nursing period and no intentional separation between mothers and pups.
In Chapter 1, I investigated a northern elephant seal pup’s ability to vocally recognize its mother across ontogeny through an auditory playback experiment at the Piedras Blancas northern elephant seal rookery in San Simeon, CA. I found that pups showed a developed ability to recognize their mother’s vocalizations later in the nursing period, at around 23 days old. At this age, they looked towards their mother’s call faster and spent more time investigating the call. Before this age, pups responded infrequently to female vocalizations and showed no differentiated response to their own mother versus an unfamiliar female. After weaning, pups responded to any female’s call. This study is the first to examine phocid pup vocal recognition abilities, and the results suggest that northern elephant seal mothers are primarily responsible for maintaining contact during the nursing period to ensure their pup’s survival.
In Chapter 2, I analyzed and described the pup attraction calls made by adult females. Visual and auditory analysis of the spectrograms suggested there may be distinct variants of attraction calls made within and across females. I characterized the calls and confirmed that female elephant seals produce three distinct variants of their attraction call. A linear discriminant analysis correctly classified the calls into their assigned categories 80% of the time. Previous research found that female elephant seals have lower vocal stereotypy than female northern fur seals. Because I demonstrated that female elephant seals produce different variants of attraction calls, I reevaluated their stereotypy while controlling for the attraction call variant. I found that female elephant seals have a higher level of stereotypy when controlling for call variant, with a linear discriminant analysis correctly assigning 50% of the calls to the correct female when controlling for call variant, and correctly assigning 37.5% of the calls when not controlling for call variant.
In summary, my results suggest that mother-pup recognition is mutual in northern elephant seals, but indicate that northern elephant seal mothers are primarily responsible for maintaining contact with their pup during dependency, as the pups do not consistently respond to their mothers’ vocalizations until the last week of the nursing period. Adult females produce calls with enough vocal stereotypy to allow for individual recognition, and they make distinct variants of attraction calls, indicating they have a larger vocal repertoire than previously assumed. Future research should further investigate adult female northern elephant seal vocalizations and how they potentially differ across ontogeny and among behavioral contexts
A Broadband, Dual Polarized Antenna For The Radio Neutrino Observatory In Greenland
Get PDFThe Radio Neutrino Observatory in Greenland (RNO-G) is a multidisciplinary, multinational collaboration which uses antennas to detect neutrino interactions with arctic ice sheets. Neutrinos are formed from nuclear reactions; predominant sources include nuclear reactors, stars, supernovae, and the big bang. They rarely interact with normal matter and thus travel from origin to destination relatively unimpeded, with applications including tracking nuclear weapons tests and supernovae. Measurements of galactic neutrino flux can provide information about how the universe developed and its current evolution. Neutrino interactions produce signals from 100 to 1000MHz. Current RNO-G antennas operate over only a portion of this band; 200MHz for horizontally polarized (Hpol) and 400MHz for vertically polarized (Vpol). In this thesis, multiple lengths of Hpol antennas are combined, and exponentially tapered geometry is added to the Vpol antenna to improve performance. Both polarizations are combined into one structure to improve observatory performance. This thesis details the design, fabrication, and testing of a new RNO-G antenna iteration. Each design is compared to frequency, gain, matching, and size requirements. Two variations of the final design are fabricated and tested, with performance compared to simulation
AS-977-24 Resolution on Excused Absence Policy Pertaining to Student Illness and Injury
Get PDFAdopts the attached Class Attendance Policy revisions; and it further resolves that the academic senate discourage faculty members from requesting a note or other verification of illness; and it further resolves that faculty who feel compelled to require a note or other verification of illness or injury should not limit that verification to a note from a “physician,” but from a “health care professional,” inclusive of telehealth services; and it further resolves that the appropriate Academic Senate committee collaborate with the Center for Teaching, Learning, and Technology to develop both syllabus language and messaging to faculty about appropriate and inclusive mechanisms for accommodating students with mental health concerns to prevent undue burden on faculty workload and ensure fair treatment of students; and it further resolves that this revision to the excused absence policy go into effect Fall 2024 and will be communicated to campus by the Academic Senate prior to that term
AS-976-24 Resolution on Sustainability Learning Objectives
Get PDFReplaces the Sustainability Learning Objectives and Statement on Sustainability with the attached as written; and further resolves that this change takes effect in the next catalog cycle
AS-973-24 Resolution to Clarify Language on Grade Forgiveness and Course Repeats effective Fall Term 2026
Get PDFAdopts the clarifications to AS-968-24 that includes the language consistent with the maximum provisions of CSU Executive Order 1037 regarding number of attempts, specifies the exclusion of grades found to be the result of academic dishonesty from grade forgiveness, specifies that courses for the graduate degree are not eligible for grade forgiveness, and approves the complete policy language specified in the attached Grade Forgiveness and Course Repeat Policy for Undergraduates; and further resolves that this policy become effective beginning with the Fall term of 2026