User-Centric Adaptive Password Policies to Combat Password Fatigue

Today, online users will have an average of 25 password-protected accounts online, yet use, on average, 6.5 passwords. The excessive cognitive burden of remembering large amounts of passwords causes Password Fatigue. Therefore users tend to reuse passwords or recycle password patterns whenever prompted to change their passwords regularly. Researchers have created Adaptive Password Policies to prevent users from creating new passwords similar to previously created ones. However, this approach creates user frustration as it neglects users’ cognitive burden. This paper proposes a novel User-Centric Adaptive Password Policy (UCAPP) Framework for password creation and management that assigns users system-generated passwords based on a cognitive-behavioural agent-based model. The framework comprises a Password Policy Assignment Test (PassPAST), a Cognitive Burden Scale (CBS), a User Profiling Algorithm, and a Password Generator (PassGEN). The framework creates tailor-made password policies that maintain password memorability for users of different cognitive thresholds without sacrificing password strength and entropy. The framework successfully created 30-40% stronger passwords for Critical users and random (non-mnemonic) passwords for Typical users based on each individual’s cognitive password thresholds in a preliminary test.

Genetic connectivity of the metapopulation of the coral Pocillopora verrucosa (Scleractinia: Pocilloporidae) in multi-use marine protected areas of the Gulf of California, and management implications

Introduction: Estimates of contemporary connectivity of the broadcast spawning coral Pocillopora verrucosa between multi-use marine protected areas (MUMPAs) are required to assess MUMPA effectiveness and their ability to enhance resilience against disturbances. Objective: To determine the genetic structure and connectivity patterns between P. verrucosa demes inside the Gulf of California and evaluate the role and effectiveness of established MUMPAS in their protection and resilience. Methods: We assessed P. verrucosa connectivity along its peninsular range (∼350 km), including five locations and three MUMPAs in the Gulf of California using six microsatellite genetic markers. Results: Population structure was significant (FST = 0.108***) when demes included clonal replicates; however, when these clones were removed from the analysis, the sexual individuals comprised a metapopulation panmixia (FST = 0.0007 NS). To further understand connectivity patterns, an assignment test was carried out which identified ten recent between-deme migrants with a mean dispersal distance of 116.6 km (± 80.5 SE). No long-distance dispersal was detected. These results highlight the ecological importance of the Bahía de La Paz region, including Archipiélago de Espíritu Santo MUMPA. This region, located at the center of the species peninsular range, exports larva to downstream sink demes such as the Loreto (northwardly) and Cabo Pulmo (southwardly) MUMPAs. Of importance, inter-MUMPA spacing was larger than the mean larval dispersal by ~56 km, suggesting thar the designation of intermediate ‘no-take’ zones would enhance short-distance connectivity. Conclusion: This study contributes as a baseline for policymakers and authorities to provide robust strategies for coral ecosystem protection and suggest that protection efforts must be increased towards peninsular intermediate reefs to promote metapopulation resilience from natural and anthropogenic factors.

An accurate assignment test for extremely low-coverage whole-genome sequence data

Genomic assignment tests can provide important diagnostic biological characteristics, such as population of origin or ecotype. In ancient DNA research, such characters can provide further information on population continuity, evolution, climate change, species migration, or trade, depending on archaeological context. Yet, assignment tests often rely on moderate- to high-coverage sequence data, which can be difficult to obtain for many ancient specimens and in ecological studies, which often use sequencing techniques such as ddRAD to bypass the need for costly whole-genome sequencing. We have developed a novel approach that efficiently assigns biologically relevant information (such as population identity or structural variants) in extremely low-coverage sequence data. First, we generate databases from existing reference data using a subset of diagnostic Single Nucleotide Polymorphisms (SNPs) associated with a biological characteristic. Low coverage alignment files from ancient specimens are subsequently compared to these databases to ascertain allelic state yielding a joint probability for each association. To assess the efficacy of this approach, we assigned inversion haplotypes and population identity in several species including Heliconius butterflies, Atlantic herring, and Atlantic cod. We used both modern and ancient specimens, including the first whole-genome sequence data recovered from ancient herring bones. The method accurately assigns biological characteristics, including population membership, using extremely low-coverage (e.g. 0.0001x fold) based on genome-wide SNPs. This approach will therefore increase the number of ancient samples in ecological and bioarchaeological research for which relevant biological information can be obtained.

Genetic diversity in clustered colonies of an Antarctic marine mesopredator: a role for habitat quality?

Genetic structure may be highly variable across seabird species, and particularly among those that are distributed over large geographical areas. The Adélie penguin (Pygoscelis adeliae) is a numerically dominant Antarctic seabird that is considered to be a key species in coastal ecosystems. Since the Last Glacial Maximum, penguin colonization of the Antarctic coastline occurred at varying geographical and temporal scales, contributing to an incomplete understanding of how modern colonies relate to each other at local or regional scales. We assessed the population genetic structure of Adélie penguins (n = 86 individuals) from three adjacent colonies along the Victoria Land coast using molecular genetic markers (i.e. seven microsatellite loci isolated through next-generation sequencing). Our results indicate meta-population dynamics and possibly relationships with habitat quality. A generally low genetic diversity (Nei's index: 0.322–0.667) was observed within each colony, in contrast to significant genetic heterogeneity among colonies (pairwise FST = 0.071–0.148), indicating that populations were genetically structured. Accordingly, an assignment test correctly placed individuals within the respective colonies from which they were sampled. The presence of inter-colony genetic differentiation contrasts with previous studies on this species that showed a lack of genetic structure, possibly due to higher juvenile or adult dispersal. Our sampled colonies were not panmictic and suggest a lower migration rate, which may reflect relatively stable environmental conditions in the Ross Sea compared to other regions of Antarctica, where the ocean climate is warming.

Phylogenetic characteristics of selected European huchen (Hucho hucho L.) broodstocks – implication for broodstock management

European huchen (Hucho hucho) is a representative of large and rare migratory salmonid fish, which has become endangered due to extensive anthropogenic changes in freshwater ecosystems. Numerous broodstocks of the European huchen have therefore been established throughout the species’ range in recent years to supplement wild fisheries of this species. Unfortunately, this conservation management strategy entails a number of potential ecological and genetic risks associated with the release of farm-raised fish into wild populations. A comprehensive and feasible genetic monitoring protocol for broodstocks maintained for the production of restocking material is therefore essential in the sustainable management of critically endangered fish species. The current paper presents phylogenetic characteristics of four selected huchen broodstocks across Central and Eastern Europe. Genetic comparisons of the studied broodstocks were based on ten microsatellite DNA markers. The effective population size (Ne), the individual assignment test, the Principal Coordinates Analysis (PCoA), the allele sharing distance (DAS) and the Bayesian clustering analysis were applied in this study. Moreover, five selected fragments of mitochondrial DNA were used for molecular verification of species membership and genetic purity of examined specimens.

Evaluation of Genetic Diversity in Goats of Telangana and Andhra Pradesh States of India

Background: The goat population of Andhra Pradesh and Telangana states is about five million, respectively. The goats of these two states lack phenotypic uniformity. But it is not known whether these populations have any genetically uniform group that can be registered as a breed. The study was undertaken to explore possibility of any potential new goat germplasm.Methods: Study was carried out at ICAR-NBAGR during 2017-19. Genetic diversity and differentiation was evaluated by using 22 microsatellite markers in three goat populations: Telangana Black (TB, n=26), Telangana Mixed (TM, n=49) and one Andhra Pradesh goat population (AP, n=45). Their genetic differentiation was compared with that of geographically closely distributed registered breeds viz. Bidri (n=28) and Nandidurga (n=48) of Karnatka and Ganjam (n=48) of Odisha. Result: The mean allele frequency observed was 6.59 (TB), 7.27 (TM) and 8.36 (AP). Expected number of alleles varied from 3.33 in (TB) to 3.69 in AP goats. Observed heterozygosity was lowest in the TM (0.474) followed by TB (0.504) and was highest in the AP goats (0.569). AP goat population had 6.3% heterozygote deficiency, whereas, both TB (15.4%) and TM (17.5%) had very high inbreeding coefficients. A total of 344 alleles were detected across the 22 loci in six goat groups. F-statistics, the pair-wise Nei’s genetic distance, assignment test and Baysian approach suggested that AP goats are distinct from two Telangana goat populations as well as from the other geographically closely related registered goat breeds. Genetic bottleneck analysis indicated the absence of any detectably large, recent genetic bottleneck in AP population. Altogether, the study identified Andhra Pradesh (AP) goats to be a new potential goat germplasm of India.

Morphological Marking Irregularity of Bahasa Indonesia and the Acquisition of English Words

All languages share the same lexical categories such as verb, noun, adjective, and adverb. Unlike English, however, Bahasa Indonesia carries fewer consistent patterns of morphological markers for word categories. A verb, for instance, is marked with the prefix {me-} as in me-nginjak (to step on); however, other verbs do not carry this marker as in makan (eat), tidur (sleep), and tergantung (depend). As for English, the suffix {-ing} or {-ed/-en}, for instance, indicates that the root is a verb regardless of the verb transitivity. This research investigated if the irregularity in the morphological marking of Bahasa Indonesia verbs created problems in acquiring English words. A test of the "word category assignment" (Test 1) was provided to two groups of respondents: undergraduate students of English and doctoral students of Bahasa Indonesia. A "word-in-context translation into English" (Test 2) was given to a group of undergraduates of English. The first was to know if the respondents managed to assign the Bahasa Indonesia words with correct lexical categories, and the second was to know if the words were assigned with correct word categories when translated in English. This was to know if the Bahasa Indonesia and English words received the same word-category. The results show that errors in the assignment of the grammatical categories of the Bahasa Indonesia words were found pervasive among the two groups. And the lexico-grammar behavior seems to give impact on the categorization of the Bahasa Indonesia words when provided in English as also detected in the translation. It is strongly indicative that confusion in the word category assignment of Bahasa Indonesia gives impact on the acquisition of English words.Key words: morphological markers, suffix, word category, language transfer, lexico-grammarAbstrak: Semua bahasa memiliki kategori leksikal yang sama seperti verba, nomina, adjektiva, dan adverbia. Tidak seperti bahasa Inggris, Bahasa Indonesia memiliki pola penanda morfologi yang lebih sedikit untuk kategori kata. Kata kerja, misalnya, ditandai dengan awalan {me} seperti pada me-nginjak; namun verba lain tidak memiliki penanda ini seperti pada makan, tidur, dan tergantung. Sedangkan bahasa Inggris, misalnya sufiks {-ing} atau {-ed /-en}, akar kata (root) adalah kata kerja terlepas dari kata kerja transitivitas. Penelitian ini mencari tahu apakah ketidakteraturan dalam penandaan morfologi kata kerja Bahasa Indonesia menimbulkan masalah dalam mempelajari kata dalam bahasa Inggris. Tes "tugas kategori kata" (Tes 1) diberikan kepada dua kelompok responden: mahasiswa sarjana Bahasa Inggris dan mahasiswa doktoral Bahasa Indonesia. Tes "terjemahan kata-dalam-konteks ke dalam bahasa Inggris" (Tes 2) diberikan kepada sekelompok mahasiswa dari kelompok bahasa Inggris. Tes pertama untuk mengetahui apakah responden berhasil menentukan kata-kata dalam Bahasa Indonesia dengan kategori leksikal yang benar, dan tes kedua untuk mengetahui apakah kata-kata tersebut diberi kategori kata yang benar ketika diterjemahkan ke dalam bahasa Inggris. Tujuan kedua tes tersebut untuk mengetahui apakah kata-kata dalam Bahasa Indonesia dan Bahasa Inggris memiliki kategori kata yang sama. Hasil penelitian menunjukkan bahwa kesalahan dalam pengkategorian gramatikal kata-kata Bahasa Indonesia ditemukan di kedua kelompok. Perilaku lexico-grammar berdampak pada kategorisasi kata-kata dalam Bahasa Indonesia jika diberikan dalam bahasa Inggris seperti yang ditemukan dalam terjemahan. Hal ini menjadi indikasi kuat bahwa kebingungan dalam penetapan kategori kata dalam Bahasa Indonesia berdampak pada pembelajaran kata dalam bahasa Inggris.Kata kunci: penanda morfologi, sufiks, kategori kata, transfer bahasa, lexico-grammar

Peningkatan Kemampuan Menulis Fabel Menggunakan Model Pembelajaran Example Non Example pada Siswa Kelas VII SMP Negeri Muara Beliti

The purpose of this study was to describe the improvement of the process and the results of the ability to write fables using the example non example learning model for grade VII.3 students of SMP Negeri Muara Beliti for the 2018/2019 academic year. This research is a classroom action research consisting of two cycles, namely cycle I and cycle II. The data collection methods used were the observation method and the fable writing assignment test method. Data analysis techniques are data reduction, descriptive presentation (narrative, visual images, tables) with a systematic and logical flow of presentation, and the conclusion of the results presented based on indicators of research success. The results showed that the example non example learning model could improve the quality of the process and the results of learning to write fables for seventh grade students of SMP Negeri Muara Beliti in the 2018/2019 academic year. This is evidenced by the increase in teacher activity in cycle I reaching 65.3%, increasing to 94.4% in cycle II. In the first cycle, student learning activities, namely 71.9%, increased to 81.3% in the second cycle.

Quantifying the influence of space on social group structure

When studying social behaviour, it can be important to determine whether the behaviour being recorded is actually driven by the social preferences of individuals. Many studies of animal social networks therefore attempt to disentangle social preferences from spatial preferences or restrictions. As such, there are a large number of techniques with which to test whether results from network analysis can be explained by random interactions, or interactions driven by similarities in space use. Selecting which of these methods to use will require determining to what extent space might influence social structure. Here we present a simple method (Social Spatial Community Assignment Test) to quantify the similarity between social and spatial group structure. We then apply this method to both simulated and empirical data of social interactions to demonstrate that it can successfully tease apart social and spatial explanations for groups. We first show that it can resolve the relative importance of space and social preferences in three simulated datasets in which interaction patterns are driven purely by space use, purely by social preferences or a mixture of the two. We then apply it to empirical data from a long-term study of free-ranging house mice. We find that while social structure is similar to spatial structure, there is still evidence for individuals possessing social preferences, with the importance of these preferences fluctuating between seasons. Our method provides a robust way of assessing the overlap between spatial and social structure, which will be invaluable to researchers when investigating the underlying drivers of social structure in wild populations.