University of Haifa

About: University of Haifa is a education organization based out in Haifa, Israel. It is known for research contribution in the topics: Population & Poison control. The organization has 7558 authors who have published 27141 publications receiving 711629 citations. The organization is also known as: Haifa University & Universiṭat Ḥefah.

Privacy by designers: software developers' privacy mindset

Abstract: Privacy by design (PbD) is a policy measure that guides software developers to apply inherent solutions to achieve better privacy protection. For PbD to be a viable option, it is important to understand developers' perceptions, interpretation and practices as to informational privacy (or data protection). To this end, we conducted in-depth interviews with 27 developers from different domains, who practice software design. Grounded analysis of the data revealed an interplay between several different forces affecting the way in which developers handle privacy concerns. Borrowing the schema of Social Cognitive Theory (SCT), we classified and analyzed the cognitive, organizational and behavioral factors that play a role in developers' privacy decision making. Our findings indicate that developers use the vocabulary of data security to approach privacy challenges, and that this vocabulary limits their perceptions of privacy mainly to third-party threats coming from outside of the organization; that organizational privacy climate is a powerful means for organizations to guide developers toward particular practices of privacy; and that software architectural patterns frame privacy solutions that are used throughout the development process, possibly explaining developers' preference of policy-based solutions to architectural solutions. Further, we show, through the use of the SCT schema for framing the findings of this study, how a theoretical model of the factors that influence developers' privacy practices can be conceptualized and used as a guide for future research toward effective implementation of PbD.

An ATP-binding cassette subfamily G full transporter is essential for the retention of leaf water in both wild barley and rice

Abstract: Land plants have developed a cuticle preventing uncontrolled water loss. Here we report that an ATP-binding cassette (ABC) subfamily G (ABCG) full transporter is required for leaf water conservation in both wild barley and rice. A spontaneous mutation, eibi1.b, in wild barley has a low capacity to retain leaf water, a phenotype associated with reduced cutin deposition and a thin cuticle. Map-based cloning revealed that Eibi1 encodes an HvABCG31 full transporter. The gene was highly expressed in the elongation zone of a growing leaf (the site of cutin synthesis), and its gene product also was localized in developing, but not in mature tissue. A de novo wild barley mutant named "eibi1.c," along with two transposon insertion lines of rice mutated in the ortholog of HvABCG31 also were unable to restrict water loss from detached leaves. HvABCG31 is hypothesized to function as a transporter involved in cutin formation. Homologs of HvABCG31 were found in green algae, moss, and lycopods, indicating that this full transporter is highly conserved in the evolution of land plants.

Feeding responses of free-flying honeybees to secondary compounds mimicking floral nectars.

Abstract: The role of secondary compounds (SC) in deterring herbivores and pathogens from vegetative parts of plants is well established, whereas their role in plant reproductive organs such as floral nectar is unclear. The present study aimed to reveal the response of free-flying honeybees to naturally occurring concentrations of four SC in floral nectar. We selected nicotine, anabasine, caffeine, and amygdalin, all of which are found in nectar of various plants. In repeated paired-choice experiments, we offered 20% sucrose solution as control along with test solutions of 20% sucrose with various concentrations of the above SC. Except for anabasine, naturally occurring concentrations of SC did not have a deterring effect. Furthermore, low concentrations of nicotine and caffeine elicited a significant feeding preference. SC can, therefore, be regarded as postingestive stimulants to pollinators, indicating that the psychoactive alkaloids in nectar may be a part of their mutualistic reward. Further studies are needed to test our hypothesis that psychoactive alkaloids in nectar impose dependence or addiction effects on pollinators.

Definable Compactness and Definable Subgroups of o-Minimal Groups

Abstract: The paper introduces the notion of definable compactness and within the context of o-minimal structures proves several topological properties of definably compact spaces. In particular a definable set in an o-minimal structure is definably compact (with respect to the subspace topology) if and only if it is closed and bounded. Definable compactness is then applied to the study of groups and rings in o-minimal structures. The main result proved is that any infinite definable group in an o-minimal structure that is not definably compact contains a definable torsion-free subgroup of dimension 1. With this theorem, a complete characterization is given of all rings without zero divisors that are definable in o-minimal structures. The paper concludes with several examples illustrating some limitations on extending the theorem.