Antiferromagnetic Coupling Supported by Metallophilic Interactions: Theoretical View

Author(s):  
Zoraida Sandoval-Olivares ◽  
Eduardo Solis-Céspedes ◽  
Dayán Páez-Hernández
2016 ◽  
Vol 8 (3) ◽  
pp. 75-92
Author(s):  
Christian Schröer

An act-theoretical view on the profile of responsibility discourse shows in what sense not only all kinds of technical, pragmatic and moral reason, but also all kinds of religious motivation cannot justify a human action sufficiently without acknowledgment to three basic principles of human autonomy as supreme limiting conditions that are human dignity, sense, and justifiability. According to Thomas Aquinas human beings ultimately owe their moral autonomy to a divine creator. So this autonomy can be considered as an expression of secondary-cause autonomy and as the voice of God in the enlightened conscience.


Author(s):  
Johannes Tröger ◽  
Hali Lindsay ◽  
Mario Mina ◽  
Nicklas Linz ◽  
Stefan Klöppel ◽  
...  

Abstract Objective: Semantic verbal fluency (SVF) tasks require individuals to name items from a specified category within a fixed time. An impaired SVF performance is well documented in patients with amnestic Mild Cognitive Impairment (aMCI). The two leading theoretical views suggest either loss of semantic knowledge or impaired executive control to be responsible. Method: We assessed SVF 3 times on 2 consecutive days in 29 healthy controls (HC) and 29 patients with aMCI with the aim to answer the question which of the two views holds true. Results: When doing the task for the first time, patients with aMCI produced fewer and more common words with a shorter mean response latency. When tested repeatedly, only healthy volunteers increased performance. Likewise, only the performance of HC indicated two distinct retrieval processes: a prompt retrieval of readily available items at the beginning of the task and an active search through semantic space towards the end. With repeated assessment, the pool of readily available items became larger in HC, but not patients with aMCI. Conclusion: The production of fewer and more common words in aMCI points to a smaller search set and supports the loss of semantic knowledge view. The failure to improve performance as well as the lack of distinct retrieval processes point to an additional impairment in executive control. Our data did not clearly favour one theoretical view over the other, but rather indicates that the impairment of patients with aMCI in SVF is due to a combination of both.


1979 ◽  
Vol 32 (2) ◽  
pp. 173-184
Author(s):  
RONALD C. FISHER

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Junwei Tong ◽  
Feifei Luo ◽  
Liuxia Ruan ◽  
Guohuai Liu ◽  
Lianqun Zhou ◽  
...  

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Mily Kundu ◽  
Santanu Pakhira ◽  
Renu Choudhary ◽  
Durga Paudyal ◽  
N. Lakshminarasimhan ◽  
...  

AbstractTernary intermetallic compound $${\text {Pr}}_2 {\text {Co}}_{0.86} {\text {Si}}_{2.88}$$ Pr 2 Co 0.86 Si 2.88 has been synthesized in single phase and characterized by x-ray diffraction, scanning electron microscopy with energy dispersive x-ray spectroscopy (SEM-EDX) analysis, magnetization, heat capacity, neutron diffraction and muon spin rotation/relaxation ($$\mu$$ μ SR) measurements. The polycrystalline compound was synthesized in single phase by introducing necessary vacancies in Co/Si sites. Magnetic, heat capacity, and zero-field neutron diffraction studies reveal that the system undergoes magnetic transition below $$\sim$$ ∼ 4 K. Neutron diffraction measurement further reveals that the magnetic ordering is antiferromagnetic in nature with an weak ordered moment. The high temperature magnetic phase has been attributed to glassy in nature consisting of ferromagnetic clusters of itinerant (3d) Co moments as evident by the development of internal field in zero-field $$\mu$$ μ SR below 50 K. The density-functional theory (DFT) calculations suggest that the low temperature magnetic transition is associated with antiferromagnetic coupling between Pr 4f and Co 3d spins. Pr moments show spin fluctuation along with unconventional orbital moment quenching due to crystal field. The evolution of the symmetry and the crystalline electric field environment of Pr-ions are also studied and compared theoretically between the elemental Pr and when it is coupled with other elements such as Co. The localized moment of Pr 4f and itinerant moment of Co 3d compete with each other below $$\sim$$ ∼ 20 K resulting in an unusual temperature dependence of magnetic coercivity in the system.


Author(s):  
Susanne Margot Rupf ◽  
Gabriel Schröder ◽  
Robin Sievers ◽  
Moritz Malischewski

2015 ◽  
Vol 17 (3) ◽  
pp. 219-230 ◽  
Author(s):  
Kevin O'Sullivan ◽  
Richard Kemp ◽  
David Bright

Purpose – The purpose of this paper is to lay the groundwork for a narrative study of desistance that is both qualitative and quantitative. Design/methodology/approach – The review traces the strands of research that have made self-story an important theme in the study of desistance with particular reference to work since 2001. Findings – The importance of an agentic self-story in the process of desistance from crime came to prominence in the work of Shadd Maruna (1997, 2001). Since then authors have attempted to formulate: first, an integrated theoretical view of desistance incorporating agency; and second, a clinically useful understanding of how self-story is important. The clinical studies have almost always been qualitative, relying on extensive life history interviews which yield great richness of detail but few, if any, testable hypotheses. To date, such studies have not provided the empirical foundation on which to develop policy in correctional environments. Practical implications – If it is found that a measure of self-belief correlates with desistance from crime, it may be possible to devise psychological interventions to enhance and change self-belief. Originality/value – The paper proposes adding a quantitative approach to the measurement of self-concept in order to estimate the likelihood of desistance.


Sign in / Sign up

Export Citation Format

Share Document