Search results for "90"

Fecundity determines the outcome of founding queen associations in ants

2021

AbstractAnimal cooperation evolved because of its benefits to the cooperators. Pleometrosis in ants - the cooperation of queens to found a colony - benefits colony growth, but also incurs costs for some of the cooperators because only one queen usually survives the association. While several traits are associated with queen survival, they tend to be confounded and it is unclear which factor specifically determines the outcome of pleometrosis. In this study, we used the ant Lasius niger to monitor offspring production in colonies founded by one or two queens. Then, we experimentally paired queens that differed in fecundity but not in size, and vice versa, to disentangle the effect of these f…

Inverting the Wollaston Illusion: Gaze Direction Attracts Perceived Head Orientation

2021

In the early 19th century, William H. Wollaston impressed the Royal Society of London with engravings of portraits. He manipulated facial features, such as the nose, and thereby dramatically changed the perceived gaze direction, although the eye region with iris and eye socket had remained unaltered. This Wollaston illusion can be thought of as head orientation attracting perceived gaze direction when the eye region is unchanged. In naturalistic viewing, the eye region changes with head orientation and typically produces a repulsion effect. Here we explore if there is a flip side to the illusion. Does the gaze direction also alter the perceived direction of the head? We used copies of the o…

Geografia sociale e partecipazione. L’esperienza di #esserefiera

2021

Social geography cannot be confined to a theoretical dimension, however necessary: it is expected to play an active role, to encourage encounters with social actors and stakeholders, to take on a dimension of public engagement. Even in Italy this dimension is increasingly important, as universities are placing a growing value on their so-called third mission. Social geography must then address the fundamental issue of participation and its techniques. In doing so, those who graduate in geography will also be able to claim an essential role in the management of decision-making processes and participatory planning. This paper explores some methods and approaches that younger geographers can u…

Psychometric properties of the MOBITEC-GP mobile application for real-life mobility assessment in older adults

2022

Aim of this study was to test the reliability and validity of the life-space measures and walking speed delivered by the MOBITEC-GP app. Participants underwent several supervised walking speed assessments as well as a 1-week life-space assessment during two assessment sessions 9 days apart. Fifty-seven older adults (47.4% male, mean age= 75.3 (±5.9) years) were included in the study. The MOBITEC-GP app showed moderate to excellent test-retest reliability (ICCs between 0.584 and 0.920) and validity (ICCs between 0.468 and 0.950) of walking speed measurements of 50 meters and above and of most 1-week life-space parameters, including life-space area, time spent out-of-home, and action range. T…

Elites de poder, gobierno municipal y Guerra de Sucesión: el concejo de Vigo en el primer cuarto del siglo XVIII

2020

Testing the recoverability of grass DNA transferred to textiles for forensic purpose

2010

Botanical evidence such as grass stains on textiles is sometimes present in the crime scene and can allow investigators to establish an association between persons linked to the criminal event and the crime scene. In this study, extraction of grass DNA from stains on textiles was undertaken. DNA extraction was performed on four grass species conserved both indoors and outdoors for 7, 14 and 30 days after staining. Once the extracted DNA was quantified, a polymerase chain reaction (PCR) amplifying a fragment of the internal transcribed spacer was performed.DNA extraction was successful in 97.5% of samples. No significant differences in the amount of extracted DNA were detected among species …

The Application of Supercritical Fluids Technology to Recover Healthy Valuable Compounds from Marine and Agricultural Food Processing By-Products: A …

2021

Food by-products contain a remarkable source of bioactive molecules with many benefits for humans; therefore, their exploitation can be an excellent opportunity for the food sector. Moreover, the revalorization of these by-products to produce value-added compounds is considered pivotal for sustainable growth based on a circular economy. Traditional extraction technologies have several drawbacks mainly related to the consumption of hazardous organic solvents, and the high temperatures maintained for long extraction periods which cause the degradation of thermolabile compounds as well as a low extraction efficiency of desired compounds. In this context, supercritical fluid extraction (SFE) ha…

Blended transdiagnostic group CBT for emotional disorders: A feasibility trial protocol

2021

Introduction Emotional disorders (anxiety and depressive disorders) are a relevant public health concern associated with high prevalence, high costs, and important disability. Therefore, research priorities include designing and testing cost-effective interventions to reach everyone in need. Internet-delivered interventions for emotional disorders are effective and can help to disseminate and implement evidence-based treatments. However, although these treatments are generally effective, not all patients benefit from this treatment format equally. Blended treatments are a new form of intervention that combines the strengths of face-to-face and Internet approaches. Nevertheless, research on …

Probabilistic maturation reaction norms assessed from mark-recaptures of wild fish in their natural habitat

2014

Published version of an article in the journal: Ecology and Evolution. Also available from the publisher at: http://dx.doi.org/10.1002/ece3.1044 Open Access Reaction norms are a valuable tool in evolutionary biology. Lately, the probabilistic maturation reaction norm approach, describing probabilities of maturing at combinations of age and body size, has been much applied for testing whether phenotypic changes in exploited populations of fish are mainly plastic or involving an evolutionary component. However, due to typical field data limitations, with imperfect knowledge about individual life histories, this demographic method still needs to be assessed. Using 13 years of direct mark-recap…

Daiļliteratūras izdevumi krievu valodā Latvijā 20.gadsimta 90. gados

2015

Maģistra darba mērķis ir noteikt galvenās tendences krievu grāmatu izdošanā Latvijā pēc 1991. gada un raksturot krievu valodā izdotās daiļliteratūras repertuāru 20. gs. 90. gados. Pētījumā tiek noteikti daiļliteratūras repertuāra kvantitatīvie parametri un analizēta tā struktūra, kā arī noskaidroti speciālistu individuālie viedokļi. Pētījuma filozofiskais pamats ir empīrisms. Kā nozares teorijas tiek izmantoti Roberta Darntona un Džona Fezera komunikācijas modeļi. Izmantotās pētniecības metodes ir bibliometrija, kontentanalīze un intervijas. Pētījuma rezultāti pierāda, ka pārmaiņas valstī pēc Latvijas neatkarības atgūšanas 1991. gadā sekmēja izmaiņas arī grāmatu izdošanas jomā, izdodamās da…