Kajian Populasi Kepiting Kenari Di Pulau Batudaka Kepulauan Togean, Sulawesi Tengah Dan Rekomendasi Manajemen Populasi

This study aimed to quantify the population of Birgus latro in the Batudaka di Togean islands, Central Sulawesi. The research on robber crab was conducted in Batudaka Island, Togean, Tomini Bay, Central Sulawesi. In the study site, 21 plots measuring of 50x50 m2 were created bounded by raffia. Feed in the form of shredded coconut is placed in each plot in the afternoon. At night was performed observations and catchs. In the "base camp" every crab crab carapace caught measured in carapace length and weight. During the study, 277 crabs were caught, consisted of 173 males (62.45%) and 104 (37.55%) females. Based on the formula calculation of Schiller (1992) population figures obtained 821 803 ± 195 030 crabs in Batudaka Island. By regression analysis between carapace length with weight, it was found that the growth of B. latro is negative allometric, i.e., weight gain is faster than the increase length of carapace. The weight gain of female is slightly higher than that of the male. Whether male crab population or female equally composed of 9 age groups. This study showed that 66.7% of male crab and 29.1% of female crab has entered the market size

Density Matrix Approach to Local Hilbert Space Reduction

We present a density matrix approach for treating systems with a large or infinite number of degrees of freedom per site with exact diagonalization or the density matrix renormalization group. The method is demonstrated on the 1D Holstein model of electrons coupled to Einstein phonons. In this system, two or three optimized phonon modes per site give results as accurate as with 10-100 bare phonon levels per site.Comment: 4 pages, 4 figure

Unveiling the Galaxy Population at 1.3 < z < 4: the HUDF05 NICMOS Parallel Fields

Using the Hubble Ultra Deep Field Near Infrared Camera and Multi-Object Spectrometer (HUDF-NICMOS) UDF05 parallel fields, we cross-matched 301 out of 630 galaxies with the ACS filters V606 and z850, NICMOS filters J110 and H160, and Spitzer IRAC filters at 3.6, 4.5, 5.8 , and 8.0 (mu)m. We modeled the spectral energy distributions (SEDs) to estimate: photometric redshifts, dust extinction, stellar mass, bolometric luminosity, starburst age and metallicity. To validate the photometric redshifts, comparisons with 16 spectroscopic redshifts give 75% within Delta or approx. 1.3. Based on the robustness of the photometric redshifts, we analyze a subsample of the 301 galaxies at 1.3 < or = z < or = 2 (35 objects) and 3 < or = z < or = 4 (31 objects) and determine that L(BoI) and the star formation rate increase significantly from z approx. 1.5 to 4. The Balmer decrement is indicative of more evolved galaxies, and at high redshifts, they serve as records of some of the first galaxies. Therefore, the galaxies in this sample are great candidates for future surveys with the James Webb Space Telescope and Atacama Large Millimeter Array

Becoming Rabbit: Living with and Knowing Rabbits

Rabbits, like all animals (human and non-human), have rich internal lives, as people who live intimately with rabbits can attest.1 Living with house rabbits—where rabbits live indoors, without a cage or with minimal caging, as part of the human family—is, to me, the best way to gain some understanding of the rabbit psyche. In addition, living closely with rabbits opens up the possibilities of the humanrabbit relationship—a relationship which, until very recently, was one-sided and based on exploitation. Today, however, with the rise of the house rabbit movement, the subjectivity of rabbits has been exposed, leading to the possibility of a human-animal relationship that is rich with possibilities—both for human and for rabbit

The Impact of Bullying Victimization and Sexual Orientation on the Severity of Suicidal Behavior

Background: Lesbian, gay, and bisexual (LGB) youth face a disproportionate risk of suicidal ideation and attempt compared to their heterosexual counterparts. The Minority Stress Theory and Interpersonal Theory of Suicide posit that chronic stress, which can occur as a result of bullying victimization, can lead to loneliness, self-hate, and suicidal ideation. The escalation from ideation to attempt can occur quickly, and most youth who survive suicide attempts pursue subsequent, riskier attempts. It is crucial to intervene when behaviors are less severe. The primary aim of this study was to compare the magnitudes of association between independent variables (bullying and sexual orientation subtypes) and three progressively worsening suicidal behaviors: suicidal ideation, attempt, and attempt resulting in a medical injury. A secondary aim was to examine potential interactions between (bullying x sexual orientation) and between (bullying x sexual orientation x gender). Method: A secondary analysis of the 2017 Youth Risk Behavior Survey (N=14,765) was performed. Outcome variables were suicidal ideation, attempt, and attempt resulting in a medical injury. Main independent variables included cyberbullying, in-school bullying, sexual orientation and gender. Race/ethnicity, age, screen time, and sadness were controlled. Outcomes were evaluated through chi-square tests and binomial logistic regressions. Interactions were tested for significance. A cumulative ordinal logistic regression determined which characteristics were associated with progressively worse forms of suicidal behavior. Results: Bivariate results indicated that bisexual youth experienced suicidal ideation and attempts more often than lesbian, gay, heterosexual, and youth who were unsure of their orientation. However, when an attempt was made, lesbian and gay youth were more likely to sustain a medical injury. With bullying and other covariates controlled, LGB youth were approximately three times as likely to ideate and twice as likely to attempt suicide compared to heterosexual youth. The severity of suicidal behavior was greatest when adolescents were bullied both in school and online. Sexual orientation significantly modified the effect of bullying on suicidal ideation when 1) the bullying occurred at school and the victim identified as bisexual, and 2) when the bullying occurred via cyberspace and the victim identified as lesbian/gay. Gender did not interact with bullying or sexual orientation. Conclusion: Additional assessment is required to uncover the tipping points that escalate decisions from ideation to attempt, and from less injurious to more lethal forms of attempt. Lesbian and gay youth may face a higher risk of engaging in lethal forms of suicide attempt compared to other sexual minority subtypes. Bullying victimization formats may affect sexual minority subtypes differently, underscoring the need to examine them as distinct groups. Many LGB high school youth were bullied both in school and online, emphasizing the need to create cultures of acceptance at school

Social Activism with Extra Sauce: How Food Communication Increases Political Awareness in Social Media

This project explores the combination of social media and food communication and challenges the prevailing belief that food on social media is trivial, frivolous, and unmeaning. This paper will explain why social media, as well as food communication, are both influential and powerful tools for activism. To prove this, I analyze Twitter posts through Storify. Ultimately, I draw conclusions about the influence of food in activism on social media. The lack of and restrictions on data available are discussed as examples of how valuable and crucial this information is, ultimately displaying that social media is not as democratic as currently perceived