scholarly journals Constraints of the Low-x Structure of Protons and Nuclei

2020 ◽  
Vol 235 ◽  
pp. 03001
Author(s):  
Thomas Peitzmann

I review recent developments in the study of the low-x partonic content of pro- tons and nuclei, with a focus on the latter, as one expects possible deviations from linear QCD evolution to be most pronounced in that case. I give examples of recent theoretical descriptions of HERA measurements with a focus on the role of BFKL evolution. I then concentrate on the status and assumptions of nuclear PDFs and the possibility to use for- ward particle production at the LHC as further constraint, in particular measurements of open charm and the potential of electromagnetic probes.

2018 ◽  
Vol 178 ◽  
pp. 03001 ◽  
Author(s):  
F.M. Nunes ◽  
P.C. Capel ◽  
Ch. Elster ◽  
L. Hlophe ◽  
Jin Lei ◽  
...  

This is a brief report on the progress made towards an exact theory for (d,p) on heavy nuclei, which is important to determine neutron capture rates for r-process nuclei. We first discuss the role of core excitation in the framework of Faddeev equations. Following that, we provide the status of the Faddeev theory being developed in the Coulomb basis with separable interactions. We then present some recent developments on nonlocal nucleon optical potentials. Finally, the progress on the theory transfer to the continuum is summarized.


2015 ◽  
Vol 38 (1) ◽  
pp. 5-36 ◽  
Author(s):  
Junko Ito ◽  
Armin Mester

The Danishstød, a kind of glottal prosody associated with certain syllables, as inbarʔn‘child’ (cf. stødlessbarnlig‘childish’), has long been the target of intense phonological investigation. In this paper, we show that its analysis requires an understanding of the prosodic constituent structure of Danish, and of the essential role of theperfect prosodic word(coextensive with one foot). After motivating this notion on independent grounds, both in other languages and in the context of acquisition, we show that the Danish stød system, analyzed in Optimality Theory, provides a window on the workings of the perfect prosodic word, regulating the presence and absence of stød in some of the much-discussed cases in the literature. In conclusion, we discuss the status of the perfect prosodic word in the light of recent developments in phonological theory, such as Match Theory.


2011 ◽  
Vol 20 (07) ◽  
pp. 1635-1640
Author(s):  
◽  
CHIARA BIANCHIN

In high energy Pb - Pb collisions at LHC a deconfined QCD medium is expected to be produced. The open charm and beauty mesons are a powerful probe to investigate the medium properties and its effects on particle production since they experience all the deconfined phase. The ALICE experiment is well suited to perform open charm analysis thanks to the excellent tracking system, its high resolution secondary vertex reconstruction capabilities and particle identification performance. In this proceeding the status of the analysis of p - p collisions at [Formula: see text] and the perspectives for Pb - Pb measurements will be presented.


Author(s):  
L.J. Chen ◽  
Y.F. Hsieh

One measure of the maturity of a device technology is the ease and reliability of applying contact metallurgy. Compared to metal contact of silicon, the status of GaAs metallization is still at its primitive stage. With the advent of GaAs MESFET and integrated circuits, very stringent requirements were placed on their metal contacts. During the past few years, extensive researches have been conducted in the area of Au-Ge-Ni in order to lower contact resistances and improve uniformity. In this paper, we report the results of TEM study of interfacial reactions between Ni and GaAs as part of the attempt to understand the role of nickel in Au-Ge-Ni contact of GaAs.N-type, Si-doped, (001) oriented GaAs wafers, 15 mil in thickness, were grown by gradient-freeze method. Nickel thin films, 300Å in thickness, were e-gun deposited on GaAs wafers. The samples were then annealed in dry N2 in a 3-zone diffusion furnace at temperatures 200°C - 600°C for 5-180 minutes. Thin foils for TEM examinations were prepared by chemical polishing from the GaA.s side. TEM investigations were performed with JE0L- 100B and JE0L-200CX electron microscopes.


2020 ◽  
Vol 48 (3) ◽  
pp. 1019-1034 ◽  
Author(s):  
Rachel M. Woodhouse ◽  
Alyson Ashe

Gene regulatory information can be inherited between generations in a phenomenon termed transgenerational epigenetic inheritance (TEI). While examples of TEI in many animals accumulate, the nematode Caenorhabditis elegans has proven particularly useful in investigating the underlying molecular mechanisms of this phenomenon. In C. elegans and other animals, the modification of histone proteins has emerged as a potential carrier and effector of transgenerational epigenetic information. In this review, we explore the contribution of histone modifications to TEI in C. elegans. We describe the role of repressive histone marks, histone methyltransferases, and associated chromatin factors in heritable gene silencing, and discuss recent developments and unanswered questions in how these factors integrate with other known TEI mechanisms. We also review the transgenerational effects of the manipulation of histone modifications on germline health and longevity.


2018 ◽  
Vol 15 (1) ◽  
pp. 55-72
Author(s):  
Herlin Hamimi ◽  
Abdul Ghafar Ismail ◽  
Muhammad Hasbi Zaenal

Zakat is one of the five pillars of Islam which has a function of faith, social and economic functions. Muslims who can pay zakat are required to give at least 2.5 per cent of their wealth. The problem of poverty prevalent in disadvantaged regions because of the difficulty of access to information and communication led to a gap that is so high in wealth and resources. The instrument of zakat provides a paradigm in the achievement of equitable wealth distribution and healthy circulation. Zakat potentially offers a better life and improves the quality of human being. There is a human quality improvement not only in economic terms but also in spiritual terms such as improving religiousity. This study aims to examine the role of zakat to alleviate humanitarian issues in disadvantaged regions such as Sijunjung, one of zakat beneficiaries and impoverished areas in Indonesia. The researcher attempted a Cibest method to capture the impact of zakat beneficiaries before and after becoming a member of Zakat Community Development (ZCD) Program in material and spiritual value. The overall analysis shows that zakat has a positive impact on disadvantaged regions development and enhance the quality of life of the community. There is an improvement in the average of mustahik household incomes after becoming a member of ZCD Program. Cibest model demonstrates that material, spiritual, and absolute poverty index decreased by 10, 5, and 6 per cent. Meanwhile, the welfare index is increased by 21 per cent. These findings have significant implications for developing the quality of life in disadvantaged regions in Sijunjung. Therefore, zakat is one of the instruments to change the status of disadvantaged areas to be equivalent to other areas.


2018 ◽  
Vol 26 (2) ◽  
pp. 205-226
Author(s):  
Bonolo Ramadi Dinokopila ◽  
Rhoda Igweta Murangiri

This article examines the transformation of the Kenya National Commission on Human Rights (KNCHR) and discusses the implications of such transformation on the promotion and protection of human rights in Kenya. The article is an exposition of the powers of the Commission and their importance to the realisation of the Bill of Rights under the 2010 Kenyan Constitution. This is done from a normative and institutional perspective with particular emphasis on the extent to which the UN Principles Relating to the Status of National Institutions for the promotion and protection of human rights (the Paris Principles, 1993) have been complied with. The article highlights the role of national human rights commissions in transformative and/or transitional justice in post-conflict Kenya. It also explores the possible complementary relationship(s) between the KNCHR and other Article 59 Commissions for the better enforcement of the bill of rights.


2020 ◽  
Vol 4 (1) ◽  
pp. 86-102
Author(s):  
Tasnim Rehna ◽  
Rubina Hanif ◽  
Muhammad Aqeel

Background: Widespread social paradigms on which the status variances are grounded in any society, gender plays pivotal role in manifestation of mental health problems (Rutter, 2007). A hefty volume of research has addressed the issue in adults nonetheless, little is vividly known about the role of gender in adolescent psychopathology. Sample: A sample of 240 adolescents (125 boys, 115 girls) aging 12-18 years was amassed from various secondary schools of Islamabad with the approval of the Federal Directorate of Education (FDE), relevant authorities of the schools and the adolescents themselves. Instruments: Taylor Manifest Anxiety Scale (Taylor & Spence, 1953) and Children’s Negative Cognitive Errors Questionnaire (CNCEQ) by Leitenberg et al., (1986) were applied in present study. Results: Multiple regression analysis revealed that cognitive errors jointly accounted for 78% of variance in predicting anxiety among adolescents. Findings also exhibited that gender significantly moderated the relationship between cognitive errors and adolescent anxiety. Implications of the findings are discoursed for future research and clinical practice.


Author(s):  
Tetiana Korolova ◽  
Nadiia Demianova

The vocative function of an address being the basic one is supplemented and modified by a number of other functions actualized in communication, i.e. the phatic one (establishing and developing the contact with the addressee), the status one (reflecting the status responsibility of the communicants), the emotional and attitudinal one (characterizing the addressee and the attitude of the speaker towards the uttered information). Such modification explains the polyfunctional character of the address in communication. All units of address, just like the components of the addressing functional field, are polysemantic and polysemy comprises every type of an address. According to the communicative tasks the following functions can be stated within the vocative one: nominative (naming the addressee), deixis (identifying the addressee), vocative proper (attracting the addressee’s attention). The field model of addresses’ semantic structures allows to research standard and nonstandard vocatives. The standard addresses form the nucleus of the semantic field under research and characterize stability of their application in one of the above-mentioned functions. Nonstandard vocative lexemes (1 % of the total amount of the experimental material) can play the role of an address under certain circumstances. They form semantically heterogeneous (conditioned by a situation) group, located in the periphery area of the semantic field of addresses. The addresses that include anthroponyms form the most widely used group (64,5 % in Ukrainian and 68,1 % in French), the second place belongs to the addresses with appellatives (34,6 % and 29,9 %, correspondingly). As to the composition of appellatives in the status and role addresses they comprise 36,4 % in Ukrainian and 34,9 % in French. Attitudinal addresses reach 63 % and 65,1 %, correspondingly.


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