163 research outputs found
Quantification of the Tidal Exchange of Radium as an Indicator of Submarine Groundwater Inputs to Great South Bay
No full text[to be added
Quantification of the Tidal Exchange of Radium as an Indicator of Submarine Groundwater Inputs to Great South Bay
No full textStony Brook University Libraries.
SBU Graduate School in Marine and Atmospheric Sciences.
Lawrence Martin (Dean of Graduate School), Henry J. Bokuniewicz, Professor
School of Marine and Atmospheric Science
Stony Brook University, J. Kirk Cochran, Professor
School of Marine and Atmospheric Science
Stony Brook University, Robert E. Wilson, Associate Professor
School of Marine and Atmospheric Science
Stony Brook University
O<sup>3</sup>HSC: Outsourced Online/Offline Hybrid Signcryption for Wireless Body Area Networks
No full textWireless body area networks (WBAN) enable ubiquitous monitoring of patients, which can change the future of healthcare services overwhelmingly. As the collected data of patients usually contain sensitive information, how to collect, transfer, store and share data securely and properly has become a concerning issue. Attribute-based encryption (ABE) can achieve data confidentiality and fine-grained access control simultaneously. Identity-based ring signature (IBRS) allows patients to prove their identity without leaking any extra (private) information. However, the heavy computational burden of ABE and IBRS is intolerable for most power-limited mobile devices, which account for a large proportion of WBAN devices. This paper combines the attribute-based online/offline encryption (ABOOE) and IBRS to achieve an outsourced online/offline hybrid signcryption ( O3 HSC) scheme. As far as we know, this scheme is the first signcryption scheme that adopts IBRS and satisfies online/offline signcryption simultaneously. O3 HSC divides the key generation and signcryption into offline and online phases to increase the throughput of the central authority and save the power resources of mobile devices, respectively. Besides, outsourced decryption and public signature verification are also realized. O3 HSC achieves security under CCA and CMIA, and the performance analysis shows that O3 HSC is a lightweight and applicable scheme for WBAN. Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Cyber Securit
Three Essays in Health Economics
No full textIn Chapter 1, we use low birth weight (LBW) and intrauterine growth restriction (IUGR) as proxies for a compromised intrauterine environment experienced by one generation, and examine its association with the LBW (or IUGR) status of the next generation. We create two three- generational samples using Taiwan birth certificates from 1978-2006 to study both maternal and paternal transmissions. The results show that the intergenerational transmission only occurs matrilineally and it is stronger among female offspring. We find weak evidence that females, but not males, born to areas with lower unemployment rate, higher average income, and higher parental education can be buffered from these effects.Chapter 2 uses the most recent vaccine scare in the U.S., the Measles-Mumps-Rubella (MMR)-autism controversy, to investigate how well-educated people respond to information differently when information is mixed. The controversy was first provoked by a paper linking autism to the childhood vaccine of MMR and was retracted years later due to scientific misconduct. We combine state-level information exposures with individual vaccination records from the National Immunization Survey, 1998-2011. Results show that the persistent increase in MMR non-uptake rate is driven by biased beliefs among well-educated mothers, which in turn leads to strong responses to only new information that confirms their beliefs. We find evidence that online search has a more influential impact on the high education group than mainstream media. Chapter 3 investigates the association between published hospital report card information and hospital relative attractiveness to commercial HMO insurers for CABG surgery in Pennsylvania during report card episodes 2006-2010. Relative bargaining position between hospitals and insurers are measured using aggregated changes in individual willingness-to-pay for a particular plan if a hospital is included in its network. Plan\u27s hospital networks are implied using PHC4 inpatient discharge data. Our results suggest that high charge hospitals in the most recent report card episode are 53.4% less attractive to insurers and low charge hospitals are 76.1% more attractive to insurers, given the plan\u27s network. Based on our calculation, low charge hospitals in the most recent report card episode are 20.5% more likely to have a new HMO contract
Effects of food combinations and stress on blood sugar dynamics
No full textThe increasing prevalence of Diabetes Mellitus (DM), globally and locally, prompts the look for interventions. Diet and stress are main factors for blood glucose level (BGL) spikes. Our gut health, which exhibits some form of relationship with our BGLs, is also affected by these factors. Hence, this project aims to empower individuals in making better lifestyle decisions related to their BGLs, food composition, stress, and gut microbiota. BGLs, heart rate (HR) and stress data were collected and processed from the author of this thesis. Food intake was quantified using an Artificial Intelligent (AI) system. It was found that while carbohydrates remain the biggest contributor to poor glycemic control, this can be countered with higher protein intake, with a higher protein-to-fats (P/F) ratio adopted. Smaller, more frequent meals may also help in controlling BGLs. Increasing both dietary fiber and sodium intake may also keep BGLs low, with dietary fiber-to-sodium (DF/S) ratio kept higher. Trans-fats intake should be minimal. Stress was found to cause larger and secondary BGL spikes. Lastly, with an animal-based diet, chicken or beef may be the more ideal protein sources for overall gut health. In conclusion, with an AI-based model, BGLs outcomes can be predicted and better managed.Bachelor of Science in Biological Science
Research on Large Divergence Angle Laser Ranging System
No full textThis study investigates a laser ranging technology scheme featuring a large divergence angle for both the emitted and received laser beams, focusing on applications where both the measured target and the ranging carrier are high-mobility platforms. A dual-concave beam-reducing lens design is adopted to reshape the original beam divergence angle of 10 mrad from the erbium glass laser into a ranging output beam divergence angle of 26 mrad, while maintaining the Gaussian energy distribution of the original laser beam. A φ500 μm photosensitive surface APD detector is used, and a combination of aspherical and spherical elements is employed in the receiving optical system to achieve a 30 mrad large field-of-view echo reception within the small photosensitive surface. This laser ranging system addresses the challenge of aiming and tracking for laser ranging between relatively high-speed moving objects and reduces the stability precision requirements for the ranging carrier platform
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