1,475 research outputs found
Appetite for destruction. Current interpretations of accidental or deliberate destructions in Bronze Age Cyprus
Destruction processes are considered 'time capsules of material culture' (Driessen 2013) as they freeze a site at one moment of its history providing key evidence for interpreting the archaeological record and reconstructing social, political, cultural and ideological circumstances. By focusing on selected case-studies, this paper aims at briefly discussing existing evidence of destruction events in Bronze Age contexts in Cyprus, and at a preliminary presentation of new research data resulting from ongoing interdisciplinary analyses at Middle Bronze Age Erimi
An Improved Model for Relativistic Solar Proton Acceleration applied to the 2005 January 20 and Earlier Events
This paper presents results on modelling the ground level response of the
higher energy protons for the 2005 January 20 ground level enhancement (GLE).
This event, known as GLE 69, produced the highest intensity of relativistic
solar particles since the famous event on 1956 February 23. The location of
recent X-ray and gamma-ray emission (N14 W61) was near to Sun-Earth connecting
magnetic field lines, thus providing the opportunity to directly observe the
acceleration source from Earth. We restrict our analysis to protons of energy
greater than 450 MeV to avoid complications arising from transport processes
that can affect the propagation of low energy protons. In light of this revised
approach we have reinvestigated two previous GLEs: those of 2000 July 14 (GLE
59) and 2001 April 15 (GLE 60). Within the limitations of the spectral forms
employed, we find that from the peak (06:55 UT) to the decline (07:30 UT)
phases of GLE 69, neutron monitor observations from 450 MeV to 10 GeV are best
fitted by the Gallegos-Cruz & Perez-Peraza stochastic acceleration model. In
contrast, the Ellison & Ramaty spectra did not fit the neutron monitor
observations as well. This result suggests that for GLE 69, a stochastic
process cannot be discounted as a mechanism for relativistic particle
acceleration, particularly during the initial stages of this solar event. For
GLE 59 we find evidence that more than one acceleration mechanism was present,
consistent with both shock and stochastic acceleration processes dominating at
different times of the event. For GLE 60 we find that Ellison & Ramaty spectra
better represent the neutron monitor observations compared to stochastic
acceleration spectra. The results for GLEs 59 and 60 are in agreement with our
previous work.Comment: 42 pages, 10 figures, 10 tables, published in ApJ, August 200
B cells in the formation of Tertiary Lymphoid Organs in autoimmunity, transplantation and tumorigenesis.
TLS develop in target organs of autoimmune diseases, transplantation and cancer.
•
TLS can function as germinal centres supporting B-cell selection/differentiation.
•
TLS can be destructive or have beneficial effects at the site of inflammation/disease.
•
Therapeutic targeting of TLS results in beneficial effects in patients, though inhibition may lead to immune suppression while stimulation may lead to autoimmunity.
Tertiary lymphoid organs named also tertiary lymphoid structures (TLS) often occur at sites of autoimmune inflammation, organ transplantation and cancer. Although the mechanisms for their formation/function are not entirely understood, it is known that TLS can display features of active germinal centres supporting the proliferation and differentiation of (auto)-reactive B cells. In this Review, we discuss current knowledge on TLS-associated B cells with particular reference on how within diseased tissues these structures are linked to either deleterious or protective outcomes in patients and the potential for therapeutic targeting of TLS through novel drugs
Historical micronutrient psychiatry: descriptive analysis of patients with pellagra admitted to the “San Lazzaro” asylum in Reggio Emilia (Italy) in the decade 1901-1910
This study aims at describing the socio-demographic and clinical characteristics of the patients affected by pellagra and admitted to the “San Lazzaro” psychiatric asylum (Reggio Emilia, Italy) from 1901 to 1910 besides exploring possible gender differences for the collected information. Data were collected from the admission register and clinical records of those patients who were admitted to the San Lazzaro Psychiatric Hospital receiving a diagnosis of pellagra at their first admission. The pellagrous patient population was characterised by a higher rate of hospitalisation for women (64.3%) and the number of hospitalised patients suffering from pellagra gradually decreased from 1901 (78; 8.3%) to 1910 (8;0.7%). The most common profession for men admitted with pellagra was farmer/agricultural labourer, while most of the women were housewives. A characteristic shared by both the male and female population of inpatients was very high rate of illiteracy: only one patient was recorded as being able to read and write. The generic diagnosis of “mental illness from pellagra” was predominant (70%), while “dementia from pellagra” accounts for 17.85% of the admission diagnoses: no statistically significant differences between men and women were found in the frequency of diagnosis. Half of the patients, both men and women, died while being inpatients. This study confirms previous findings about the case mix of pellagra patients admitted to psychiatric hospital at the beginning of the last century in northern Italy and highlights the significance of the relationship of psychiatry with other medical disciplines and the sociocultural milieu
Neuropsychiatric Questionnaires in Systemic Lupus Erythematosus
Patients with systemic lupus erythematosus
(SLE) can be affected by a multitude
of neurologic and psychiatric symptoms with a wide range of prevalence and severity. Irrespectively from attribution to SLE or other causes, neuropsychiatric
(NP) symptoms strongly impact short-term and long-term outcomes,thus NP evaluation during routine clinical practice in SLE should be undertaken regularly.
The assessment of NP involvement in
SLE patients is challenging and the
available diagnostic tools fail to guarantee optimal diagnostic accuracy, sensitivity to changes as well as feasibility in routine clinical care.
Standardised questionnaires (both physician-administered and self-reported)
can offer valuable help to the treating
physician to capture all possible NP
syndromes; few SLE-specific NP questionnaire have been developed but validation in large cohort or cross-cultural adaptations are still pending. On the other hand, general instruments have
been largely applied to SLE patients.
Both kinds of questionnaires can address
all possible NP manifestations either globally or, more frequently, focus
on specific NP symptoms. These latter have been mainly used in SLE to detect and classify mild and subtle symptoms, more likely to be overlooked during routine clinical assessment such as headache, cognitive impairment and psychiatric manifestations.
In conclusion, this literature review
highlights a clear case for validation
studies in this area and the wider implementation of questionnaires to assess
NP involvement is still warranted. The
broader use of such instruments could
have important consequences; first of
all, by standardising symptom assessment,
a better definition of the prevalence
of NP manifestation across different
centres could be achieved. Secondly,
prospective studies could allow for
the evaluation of clinical significance
of mild symptoms and their impact on
the patient’s function and quality of life
- …