A Brief Retrospective Look at the Cayley-Purser Public-key Cryptosystem, 19 Years Later

The purpose of this paper is to describe and analyze the Cayley-Purser algorithm, which is a public-key cryptosystem proposed by Flannery in 1999. I will present two attacks on it, one of which is apparently new. I will also examine a variant of the Cayley-Purser algorithm that was patented by Slavin in 2008, and show that it is also insecure.Comment: submitted for publicatio

Purser Support and the Tendency of Depression Among Civil Female Flight Attendants in Indonesia

Background: Depression can occur in female flight attendants. The purpose of this study was to findthe correlationbetween purser support and other factors with depression among female civil flight attendants in Indonesia.Methods: This cross-sectional study with purposive sampling was carried out on female civilian flightattendantsundergoing routine medical check up at the Civil Aviation Medical Center Jakarta from May12to18, 2014. Those taking antidepressants or benzodiazepines,ordrink alcohol more than 3 times a day,were excluded for this study. Depression was measured using the Beck Depression Inventory Questionnaire.Purser support, co-workers support, support outside workand mental workload were measured using theNIOSH Generic Job Stress Questionnaire. Risk factors for depression were analyzed using linear regression.Results: Out of 242 female flight attendants undergoing routine medical check up, 145 persons met thestudy criteria. Purser support, support outside work, as well as mental workload were the dominant riskfactors related to depression among female civilian flight attendants. One point increase of purser support,decreaseddepression by 0.552 point [regression coefficient (β) = -0.552; p = 0.033]. One point increase ofsupport outside work, decreaseddepression by 1.191 points [β = -1.191; p = 0.000]. On the other hand, onepoint increase of mental workload, increaseddepression by 0.549 point (β = 0.549; p = 0.045).Conclusion: Increased purser and outside of worksupportsdecreased the risk of depression, however, moremental work load increased depression among civilian flight attendants in Indonesia. (Health ScienceJournal of Indonesia 2015;6:76-80

Paradigms in the study of creativity: introducing the perspective of cultural psychology

This article identifies three paradigms in creativity theory and research in psychology. The He-paradigm, focused on the solitary genius, has been followed, mainly after the 1950s, by the I-paradigm, equally individualistic in nature but attributing creativity to each and every individual. Extending this view, the We-paradigm incorporates what became known as the social psychology of creativity. The cultural psychology of creativity builds upon this last theoretical approach while being critical of some of its assumptions. This relatively new perspective, using the conceptual and methodological framework of cultural psychology, investigates the sociocultural roots and dynamics of all our creative acts and employs a tetradic framework of self – community – new artifact – existing artifacts in its conceptualization of creativity. The theoretical basis of the cultural psychology approach is analyzed as well as some of its main implications for both the understanding and study of creativity

Complex belemnites of the Puaroan (lower-? middle Tithonian) stage in the Port Waikato Region of New Zealand

Belemnite guards range through 2700 feet of Puaroan strata in the Port Waikato region. All are Belemnopsis of the uhligi-complex. Belemnopsis aucklandica aucklandica (Hochstetter) in its most typical form may be restricted to the lower 700 feet of the sequence. Three species are described, together with what may be transitional forms. The morphology of juvenile guards is in marked contrast with that of mature specimens, and development of the adult guard is revealed by examination of internal sections. Some aspects of belemnite paleoecology are discussed. Belemnite biostratigraphy of the area is outlined and the more important fossil localities are described

Stratigraphy of Tithonian (Ohauan-Puaroan ) marine beds near Port Waikato, New Zealand, and a redescription of Belemnopsis aucklandica (Hochstetter).

Some 1500 m of marine Ohauan and Puaroan strata in the Port Waikato region of New Zealand are restudied in an attempt to resolve lithostratigraphic and biostratigraphic anomalies in published works. New correlations are proposed for some units of the Apotu Group. A lower 650 m siltstone, previously correlated entirely with Kinohaku Siltstone, is here regarded as including the interval Kinohaku Siltstone to Lower Puti Siltstone (new member). The Waiharakeke Conglomerate is not represented in the area by coarse sediments. A thin sandstone unit overlying the Lower Puti Siltstone and previously correlated with Waiharakeke Conglomerate is here correlated with the Ruakiwi Sandstone. The overlying 400 m siltstone, regarded previously as the entire Puti Siltstone, is here recognised as a new member, the Upper Puti Siltstone. The Coleman Conglomerate is much thicker in the region than mapped, and located higher in the sequence. Biostratigraphy is a key element in correlating the sequence with named units to the south. The sequence is mostly siltstone, but sandstone units provide some lithostratigraphic control. Belemnites are almost the only fossils found in the Late Ohauan and Early Puaroan part of the sequence and are important in the Late Puaroan. Formal belemnite zones, based in part on their stratigraphic distributions in other parts of southwest Auckland, are erected. Occasional ammonites provide tie points that correlate the succession with the standard stratigraphic column for the Tethyan realm. Belemnopsis aucklandica (Hochstetter) is redescribed and considered to be of full specific status as is its former subspecies, Belemnopsis trechmanni Stevens. Many pre-adult Belemnopsis aucklandica differ in form from adults, some have been previously identified in the field as Hibolithes. Some earlier identifications of belemnites from the Late Puaroan of Port Waikato are incorrect, most are now included in Belemnopsis aucklandica

Icefish spawning aggregation in the southern Weddell Sea

During the Continental Shelf Multidisciplinary Flux Study (COSMUS) expedition from February to March 2021 aboard RV Polarstern (expedition ID: PS124) (Hellmer & Holtappels, 2021), a large spawning aggregation of notothenioid icefish (Neopagetopsis ionah, Nybelin 1947) was discovered in the southern Weddell Sea. The CCAMLR community was informed of this discovery by Germany in COMM CIRC 22/10 and SC CIRC 22/08 earlier this year (17 January 2022). Purser et al. (2022) report on the spawning aggregation in Current Biology. Here we provide detailed information on the active fish nest aggregation and on additional icefish nesting sites observed in the Filchner Trough area (Knust & Schröder, 2014; Schröder, 2016; Riginella et al., 2021; Purser et al., 2022; Purser et al., in review)

Meditation Matters: Replies to the Anti-McMindfulness Bandwagon!

A critical reply to the anti-mindfulness critics in the collection, who oppose the popular secularized adoption of mindfulness on various grounds (it is not Buddhism, it is Buddhism, it is a tool of neo-capitalist exploitation, etc.), I argue that mindfulness is a quality of consciousness, opposite mindlessness, that may be cultivated through practice, and is almost always beneficial to those who cultivate it

Synonymy and stratigraphic ranges of Belemnopsis in the Heterian and Ohauan Stages (Callovian-Tithonian), southwest Auckland, New Zealand.

Belemnopsis stevensi, Belemnopsis maccrawi, and Belemnopsis sp. A (Challinor 1979a) are synonymous; B. stevensi has priority. New belemnite material from Kawhia Harbour and Port Waikato, together with graphical study methods, indicates that many small fragmentary specimens associated with B. stevensi in the lower part of its stratigraphic range are probably the same taxon. B. stevensi has been found only in the Middle and Upper Heterian Stage (Lower Kimmeridgian) at Kawhia and only in the Lower Ohauan Stage (Upper Kimmeridgian) at Port Waikato. This apparently disjunct distribution is attributed to poor exposure in the relevant sections. Belemnopsis kiwiensis n.sp., Belemnopsis cf. sp. B, Belemnopsis sp. B, Belemnopsis sp. D, and Belemnopsis spp. are associated with B. stevensi near the lowest known point in its stratigraphic range. The distribution of stratigraphically useful belemnites within the Heterian and Ohauan Stages is: Conodicoelites spp. (Lower Heterian; correlated with Lower Callovian); Belemnopsis annae (Lower and Middle Heterian; Lower Callovian/Lower Kimmeridgian); Belemnopsis stevensi (Middle Heterian/Lower Ohauan; Kimmeridgian); Belemnopsis keari (Upper Heterian; Kimmeridgian); Belemnopsis trechmanni (Upper Ohauan; Upper Kimmeridgian/Middle Tithonian). The apparently extreme range of Belemnopsis annae remains unexplained. Klondyke Sandstone (new) is recognised as the basal member of Moewaka Formation (Port Waikato area)