Color study of asteroid families within the MOVIS catalog

The aim of this work is to study the compositional diversity of asteroid families based on their near-infrared colors, using the data within the MOVIS catalog. As of 2017, this catalog presents data for 53 436 asteroids observed in at least two near-infrared filters (Y, J, H, or Ks). Among these asteroids, we find information for 6299 belonging to collisional families with both Y −J and J−Ks colors defined. The work presented here complements the data from SDSS and NEOWISE, and allows a detailed description of the overall composition of asteroid families. We derived a near-infrared parameter, the ML*, that allows us to distinguish between four generic compositions: two different primitive groups (P1 and P2), a rocky population, and basaltic asteroids. We conducted statistical tests comparing the families in the MOVIS catalog with the theoretical distributions derived from our ML* in order to classify them according to the above-mentioned groups. We also studied the background populations in order to check how similar they are to their associated families. Finally, we used this parameter in combination with NEOWISE and SDSS to check for possible bimodalities in the data. We found 43 families with ML*err < 0.071 and with at least 8 asteroids observed: 5 classified as P1, 10 classified as P2, 19 families associated with the rocky population, and 9 families that were not linked to any of the previous populations. In these cases, we compared our samples with different combinations of these theoretical distributions to find the one that best fits the family data. We also show, using the data from MOVIS and NEOWISE, that the Bapistina family presents a two-cluster distribution in the near-infrared albedo vs. ML* parameter space that might be related to a common differentiated parent body. Finally, we show that the backgrounds we defined seem to be linked to their associated families.

Download Full-text

Widely distributed exogenic materials of varying compositions and morphologies on asteroid (101955) Bennu

Monthly Notices of the Royal Astronomical Society ◽

10.1093/mnras/stab2548 ◽

2021 ◽

Author(s):

Eri Tatsumi ◽

Marcel Popescu ◽

Humberto Campins ◽

Julia de León ◽

Juan Luis Rizos García ◽

...

Keyword(s):

Near Infrared ◽

Principal Component ◽

Parent Body ◽

Ordinary Chondrites ◽

Near Infrared Reflectance ◽

Spatially Resolved ◽

Average Spectrum ◽

Band Absorption ◽

Rich Material ◽

The One

Abstract Using the multiband imager MapCam onboard the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) spacecraft, we identified 77 instances of proposed exogenic materials distributed globally on the surface of the B-type asteroid (101955) Bennu. We identified materials as exogenic on the basis of an absorption near 1 µm that is indicative of anhydrous silicates. The exogenic materials are spatially resolved by the telescopic camera PolyCam. All such materials are brighter than their surroundings, and they are expressed in a variety of morphologies: homogeneous, breccia-like, inclusion-like, and others. Inclusion-like features are the most common. Visible spectrophotometry was obtained for 46 of the 77 locations from MapCam images. Principal component analysis indicates at least two trends: (i) mixing of Bennu's average spectrum with a strong 1-µm band absorption, possibly from pyroxene-rich material, and (ii) mixing with a weak 1-µm band absorption. The endmember with a strong 1-µm feature is consistent with Howardite-Eucrite-Diogenite (HED) meteorites, whereas the one showing a weak 1-µm feature may be consistent with HEDs, ordinary chondrites, or carbonaceous chondrites. The variation in the few available near-infrared reflectance spectra strongly suggests varying compositions among the exogenic materials. Thus, Bennu might record the remnants of multiple impacts with different compositions to its parent body, which could have happened in the very early history of the Solar System. Moreover, at least one of the exogenic objects is compositionally different from the exogenic materials found on the similar asteroid (162173) Ryugu, and they suggest different impact tracks.

Download Full-text

THE PARAMETER SPACE OF A QUADRATIC FAMILY OF POLYNOMIAL MAPS OF ℂ2

International Journal of Mathematics ◽

10.1142/s0129167x08004819 ◽

2008 ◽

Vol 19 (05) ◽

pp. 541-556

Author(s):

ALINA ANDREI

Keyword(s):

Lyapunov Exponents ◽

Parameter Space ◽

Mandelbrot Set ◽

General Context ◽

One Dimensional ◽

Polynomial Maps ◽

Regular Maps ◽

The Family ◽

The One ◽

Polynomial Family

In this paper, we study the parameter space of the quadratic polynomial family fλ,μ(z, w) = (λz + w2, μw + z2), which exhibits interesting dynamics. Two distinct subsets of the parameter space are studied as appropriate analogs of the one-dimensional Mandelbrot set and some of their properties are proved by using Lyapunov exponents. In the more general context of holomorphic families of regular maps, we show that the sum of the Lyapunov exponents is a plurisubharmonic function of the parameter, and pluriharmonic on the set of expanding maps. Moreover, for the family fλ,μ, we prove that the sum of the Lyapunov exponents is continuous.

Download Full-text

What we know about Families of Asteroids

Highlights of Astronomy ◽

10.1017/s1539299600007887 ◽

1989 ◽

Vol 8 ◽

pp. 273-279

Author(s):

V. Zappala’

Keyword(s):

Family Members ◽

Parent Body ◽

Classification Methods ◽

Hypervelocity Impacts ◽

Mass Distributions ◽

Proper Elements ◽

The Family ◽

Families Of Asteroids ◽

Asteroid Families ◽

Degree Of Fragmentation

AbstractAsteroid families are considered for the most to represent fragments of collisional breakup of precursor bodies. If true, this offers the unique possibility to examine the interiors of large bodies and to study the processes of collision on a scale much larger than can be done in laboratory. Indeed, the general features of the mass distributions and of the ejection velocities of the family members can be interpreted in terms of collisional disruption of a parent body followed by self-gravitational reaccumulation on the largest remnant. However, several problems remain open: a) the degree of fragmentation in real families is generally lower than that observed for experimental targets; b) the relative velocities computed including also proper eccentricity and inclination differences are higher by about a factor 4 than those derived from semiaxes differences only; c) only very few of the presently proposed families have distributions of inferred mineralogies consistent with cosmochemistry. Further studies are needed, including better proper elements computation, classification methods, and new investigations on the physics of hypervelocity impacts.

Download Full-text

Murder with Impunity: The Construction of Arab Masculinities and Honor Crimes

Al-Raida Journal ◽

10.32380/alrj.v0i0.39 ◽

1970 ◽

pp. 38-45

Author(s):

May Abu Jaber

Keyword(s):

Violence Against Women ◽

Social Boundaries ◽

Religious Institutions ◽

The Social ◽

The Family ◽

The Media ◽

The One ◽

Male Authority ◽

Cultural Networks ◽

Gender Specific

Violence against women (VAW) continues to exist as a pervasive, structural,systematic, and institutionalized violation of women’s basic human rights (UNDivision of Advancement for Women, 2006). It cuts across the boundaries of age, race, class, education, and religion which affect women of all ages and all backgrounds in every corner of the world. Such violence is used to control and subjugate women by instilling a sense of insecurity that keeps them “bound to the home, economically exploited and socially suppressed” (Mathu, 2008, p. 65). It is estimated that one out of every five women worldwide will be abused during her lifetime with rates reaching up to 70 percent in some countries (WHO, 2005). Whether this abuse is perpetrated by the state and its agents, by family members, or even by strangers, VAW is closely related to the regulation of sexuality in a gender specific (patriarchal) manner. This regulation is, on the one hand, maintained through the implementation of strict cultural, communal, and religious norms, and on the other hand, through particular legal measures that sustain these norms. Therefore, religious institutions, the media, the family/tribe, cultural networks, and the legal system continually disciplinewomen’s sexuality and punish those women (and in some instances men) who have transgressed or allegedly contravened the social boundaries of ‘appropriateness’ as delineated by each society. Such women/men may include lesbians/gays, women who appear ‘too masculine’ or men who appear ‘too feminine,’ women who try to exercise their rights freely or men who do not assert their rights as ‘real men’ should, women/men who have been sexually assaulted or raped, and women/men who challenge male/older male authority.

Download Full-text

HUBUNGAN DUKUNGAN KELUARGA TERHADAP TINGKAT KEMANDIRIAN ANAK RETARDASI MENTAL

Jurnal Keperawatan ◽

10.32583/keperawatan.v11i2.427 ◽

2019 ◽

Vol 11 (2) ◽

pp. 87-92

Author(s):

Dwi Indah Iswanti ◽

Fery Agusman Motuho Mendrofa ◽

Diyanto Diyanto

Keyword(s):

Family Support ◽

Quantitative Method ◽

Statistical Tests ◽

Sampling Technique ◽

Mentally Retarded ◽

P Value ◽

Cross Sectional ◽

Need Support ◽

The Family ◽

Mentally Retarded Children

Kemandirian bukanlah keterampilan yang muncul secara tiba-tiba tetapi perlu diajarkan dan dilatih pada anak agar tidak menghambat tugas- tugas perkembangan anak selanjutnya. Terutama pada anak yang mengalami retardasi mental akan sangat membutuhkan dukungan dari keluarga. Tujuan penelitian untuk mengetahui hubungan dukungan keluarga dengan tingkat kemandirian anak retardasi mental di SLB Negeri Semarang. Penelitian ini menggunakan metode kuantitatif dengan pendekatan cross sectional. Populasi dalam penelitian ini adalah seluruh orang tua siswa kelas IV-VI di SLB Negeri Semarang yang berjumlah 64 siswa. Teknik sampling yang digunakan adalah total sampling. Dukungan keluarga pada anak retardasi mental sebagian besar adalah mendukung yaitu sebanyak 53,1%, kemandirian anak retardasi mental sebagian besar adalah kurang mandiri yaitu sebanyak 53,1%. Hasil uji statistik menemukan ada hubungan antara dukungan keluarga dengan kemandirian anak retardasi mental di SLB Negeri Semarang, dengan p value sebesar 0,000. Kata kunci : dukungan keluarga, kemandirian anak retardasi mental THE CORRELATION BETWEEN FAMILY SUPPORT AND THE LEVEL OF INDEPENDENCE OF MENTALLY RETARDED CHILDREN ABSTRACT Independence is not a skill that emerges suddenly but needs to be taught and trained in children so as not to inhibit the tasks of further child development. Especially for children who are mentally retarded, they will need support from the family. Research objectives to find out the correlation between family support and the level of independence of mentally retarded children in extraordinary school State of Semarang. This study uses a quantitative method with a cross sectional approach. The population in this study were all parents of students in class IV-VI in Semarang State SLB, amounting to 64 students. The sampling technique used is total sampling. Family support for mentally retarded children was mostly supportive, as much as 53.1%, the independence of most mentally retarded children was less independent, which was as much as 53.1%. The results of statistical tests found that there was a correlation between family support and the independence of mentally retarded children in Semarang State SLB, with a p value of 0,000. Keywords: family support, independence of mentally retarded children

Download Full-text

Search Acceleration of Evolutionary Multi-Objective Optimization Using an Estimated Convergence Point

Mathematics ◽

10.3390/math7020129 ◽

2019 ◽

Vol 7 (2) ◽

pp. 129 ◽

Cited By ~ 4

Author(s):

Yan Pei ◽

Jun Yu ◽

Hideyuki Takagi

Keyword(s):

Parameter Space ◽

Statistical Tests ◽

Distribution Characteristic ◽

Multi Objective Optimization ◽

Pareto Improvement ◽

Pareto Solutions ◽

Pareto Solution ◽

Multi Objective ◽

Objective Space ◽

Convergence Point

We propose a method to accelerate evolutionary multi-objective optimization (EMO) search using an estimated convergence point. Pareto improvement from the last generation to the current generation supports information of promising Pareto solution areas in both an objective space and a parameter space. We use this information to construct a set of moving vectors and estimate a non-dominated Pareto point from these moving vectors. In this work, we attempt to use different methods for constructing moving vectors, and use the convergence point estimated by using the moving vectors to accelerate EMO search. From our evaluation results, we found that the landscape of Pareto improvement has a uni-modal distribution characteristic in an objective space, and has a multi-modal distribution characteristic in a parameter space. Our proposed method can enhance EMO search when the landscape of Pareto improvement has a uni-modal distribution characteristic in a parameter space, and by chance also does that when landscape of Pareto improvement has a multi-modal distribution characteristic in a parameter space. The proposed methods can not only obtain more Pareto solutions compared with the conventional non-dominant sorting genetic algorithm (NSGA)-II algorithm, but can also increase the diversity of Pareto solutions. This indicates that our proposed method can enhance the search capability of EMO in both Pareto dominance and solution diversity. We also found that the method of constructing moving vectors is a primary issue for the success of our proposed method. We analyze and discuss this method with several evaluation metrics and statistical tests. The proposed method has potential to enhance EMO embedding deterministic learning methods in stochastic optimization algorithms.

Download Full-text

Personality and Dementia: an Approach to Differential Profile of the Caregiver

European Journal of Investigation in Health, Psychology and Education ◽

10.3390/ejihpe1030007 ◽

2011 ◽

Vol 1 (3) ◽

pp. 85-94

Author(s):

Elena de Andrés-Jiménez ◽

Rosa Mª Limiñana-Gras ◽

Encarna Fernández-Ros

Keyword(s):

Relevant Information ◽

Personality Profile ◽

Family Carers ◽

Psychological Variables ◽

People With Dementia ◽

The Family ◽

Study Population ◽

The One ◽

The Impact

The aim of this study is to determine the existence of a characteristic personality profile of family carers of people with dementia. The correct knowledge and use of psychological variables which affect the carer, helps to promote appropriate actions to mitigate the impact of care and improve the carer’s quality of life and likewise the one of the person cared for. The study population consists of 69 family carers of people with dementia, members of various associations and care centers. The results allow us to identify a characteristic personality profile for these carers and it reveals a specific psychological working in this sample, although we cannot directly relate it with the tasks of caring for people with this disease, this profile gives us very relevant information to pay more attention to the needs of this group. Moreover, the analysis of personality styles depends on the sex of the family carer, showing, once again, that the woman is in a situation of most vulnerability.

Download Full-text

The ScotoSinglet Model: a scalar singlet extension of the Scotogenic Model

Journal of High Energy Physics ◽

10.1007/jhep06(2021)136 ◽

2021 ◽

Vol 2021 (6) ◽

Author(s):

Ankit Beniwal ◽

Juan Herrero-García ◽

Nicholas Leerdam ◽

Martin White ◽

Anthony G. Williams

Keyword(s):

Parameter Space ◽

Direct Detection ◽

Neutrino Masses ◽

Minimal Models ◽

Flavour Violation ◽

The One ◽

Relic Abundance ◽

Electroweak Precision ◽

Scalar Singlet ◽

Lepton Flavour

Abstract The Scotogenic Model is one of the most minimal models to account for both neutrino masses and dark matter (DM). In this model, neutrino masses are generated at the one-loop level, and in principle, both the lightest fermion singlet and the lightest neutral component of the scalar doublet can be viable DM candidates. However, the correct DM relic abundance can only be obtained in somewhat small regions of the parameter space, as there are strong constraints stemming from lepton flavour violation, neutrino masses, electroweak precision tests and direct detection. For the case of scalar DM, a sufficiently large lepton-number-violating coupling is required, whereas for fermionic DM, coannihilations are typically necessary. In this work, we study how the new scalar singlet modifies the phenomenology of the Scotogenic Model, particularly in the case of scalar DM. We find that the new singlet modifies both the phenomenology of neutrino masses and scalar DM, and opens up a large portion of the parameter space of the original model.

Download Full-text

The Image of the Family and Family Home in Małgorzata Musierowicz’s Series of Novels, and the Stereotype of the Family in Contemporary Polish Society

Children s Literature in Education ◽

10.1007/s10583-021-09449-6 ◽

2021 ◽

Author(s):

Joanna Senderska ◽

Iwona Mityk ◽

Ewa Piotrowska-Oberda

Keyword(s):

Social Consciousness ◽

Traditional Family ◽

Patriarchal Family ◽

Family Model ◽

The Family ◽

Language Data ◽

Polish Society ◽

Family Home ◽

The One ◽

Over 40 Years

AbstractThe article discusses the image of the family and the family home in a series of novels for young people by the popular Polish writer Małgorzata Musierowicz in the context of literary conventions and stereotypes about the family in contemporary Polish society. The novels, which cover a period of over 40 years, generally fit contemporary Polish realities; however, the didactic function of the novels results in the author creating an idealized image of the Polish intellectual family, filling the readers with optimism. The picture created by the writer, on the one hand, fits perfectly into the stereotype of the family, which is one of the values highly esteemed by Poles. On the other hand, it adapts to the conventions of novels for girls. In this article, the stereotype of the family is reconstructed on the basis of language data and surveys. We present the meanings and contexts of family as a noun and family as an adjective. We also present the results of our survey, the aim of which was to determine an essence of a stereotypical family and how the traditional family model is comprehended by respondents coming from various groups. We also present the respondents’ attitude to the patriarchal family model and the division of roles into male and female. In our opinion, the correspondence between the family picture created in the novels and the image of the family operating in social consciousness is the reason for the popularity of the series.

Download Full-text

Two Separate Cases: Complex Chromosomal Abnormality Involving Three Chromosomes and Small Supernumerary Marker Chromosome in Patients with Impaired Reproductive Function

Genes ◽

10.3390/genes11121511 ◽

2020 ◽

Vol 11 (12) ◽

pp. 1511

Author(s):

Tatyana V. Karamysheva ◽

Tatyana A. Gayner ◽

Vladimir V. Muzyka ◽

Konstantin E. Orishchenko ◽

Nikolay B. Rubtsov

Keyword(s):

Genetic Counseling ◽

Chromosome Rearrangement ◽

Marker Chromosome ◽

Reproductive Function ◽

Small Supernumerary Marker Chromosome ◽

Comprehensive Chromosome Screening ◽

The Family ◽

Multicolor Banding ◽

The One

For medical genetic counseling, estimating the chance of a child being born with chromosome abnormality is crucially important. Cytogenetic diagnostics of parents with a balanced karyotype are a special case. Such chromosome rearrangements cannot be detected with comprehensive chromosome screening. In the current paper, we consider chromosome diagnostics in two cases of chromosome rearrangement in patients with balanced karyotype and provide the results of a detailed analysis of complex chromosomal rearrangement (CCR) involving three chromosomes and a small supernumerary marker chromosome (sSMC) in a patient with impaired reproductive function. The application of fluorescent in situ hybridization, microdissection, and multicolor banding allows for describing analyzed karyotypes in detail. In the case of a CCR, such as the one described here, the probability of gamete formation with a karyotype, showing a balance of chromosome regions, is extremely low. Recommendation for the family in genetic counseling should take into account the obtained result. In the case of an sSMC, it is critically important to identify the original chromosome from which the sSMC has been derived, even if the euchromatin material is absent. Finally, we present our view on the optimal strategy of identifying and describing sSMCs, namely the production of a microdissectional DNA probe from the sSMC combined with a consequent reverse painting.

Download Full-text