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Chicanx Utopias
Amid the rise of neoliberalism, globalization, and movements for
civil rights and global justice in the post-World War II era,
Chicanxs in film, music, television, and art weaponized culture to
combat often oppressive economic and political conditions. They
envisioned utopias that, even if never fully realized, reimagined
the world and linked seemingly disparate people and places. In the
latter half of the twentieth century, Chicanx popular culture
forged a politics of the possible and gave rise to utopian dreams
that sprang from everyday experiences.
In Chicanx Utopias , Luis Alvarez offers a broad study
of these utopian visions from the 1950s to the 2000s. Probing the
film Salt of the Earth , brown-eyed soul music, sitcoms,
poster art, and borderlands reggae music, he examines how Chicanx
pop culture, capable of both liberation and exploitation, fostered
interracial and transnational identities, engaged social movements,
and produced varied utopian visions with divergent possibilities
and limits. Grounded in the theoretical frameworks of Walter
Benjamin, Stuart Hall, and the Zapatista movement, this book
reveals how Chicanxs articulated pop cultural utopias to make sense
of, challenge, and improve the worlds they inhabited.
eBook
العلاج النفسي للرضيع : هل هو ممكن
\"يتطرق المؤلفان في الكتاب إلى التفاعلات التي تقوم بين الأبوين والرضيع بشتى تجلياتها وإشكالاتها، وما قد يقترن بها أو يترتب عليها من اضطرابات نفسية، ويندرج هذا المبحث ضمن العلاج النفسي الولادي، الذي يعد مدخلا إبستمولوجيا لدراسة الرضيع من زاوية علم النفس المرضي، ومن جهة كونه موضوعا للدراسة السريرية، انصرف المؤلفان إلى تفصيل القو في المقاربة السريرية للرضيع، مشيرين إلى خمس سمات كبرى ما فتئت تغنيها وتثريها، وهي قيامها على الملاحظة والتفاعل واعتدادها بالتحويل العكسي وبالوضعية وبالبعد التاريخي، ثم عمدا إلى وصف دقيق لقدرات الرضيع، الحسية والحركية والاجتماعية والإدراكية، وإعمال النظر في قدرات الأبوين ودينامية الحمل النفسية، مع التنويه بمفهومي الطفل الخيالي والطفل الاستيهامي، حيث يراد بالأول ذلك الطفل الذي يستطيع الأبوان أن يتمثلاه ويتخيلاه بسهولة، بينما يرتبط الثاني باستيهامات الأبوين، ومن ثم فهو ينتمي إليهما، وبعد الولادة، سيتعين عليهما أن يوفقا بين وجود الطفل الخيالي والاستيهامي وبين رضيعهما الحقيقي. إن فائدة هذا الكتاب تكمن في كونه يرسم بوضوح وبهاجس تعليمي بين معالم وممارسة إلى إسهامات التحليل ما يستند تنظيرا الوضع الراهن في مجال البحث في العلاج النفسي للرضيع، الذي كثيرا النفسي\"
Book
The tailored sperm cell
Sperm are ubiquitous and yet unique. Genes involved in sexual reproduction are more divergent than most genes expressed in non-reproductive tissues. It has been argued that sperm have been altered during evolution more than any somatic cell. Profound variations are found at the level of morphology, motility, search strategy for the egg, and the underlying signalling mechanisms. Sperm evolutionary adaptation may have arisen from sperm competition (sperm from rival males compete within the female’s body to fertilize eggs), cryptic female choice (the female’s ability to choose among different stored sperm), social cues tuning sperm quality or from the site of fertilization (internal vs. external fertilization), to name a few. Unquestionably, sperm represent an invaluable source for the exploration of biological diversity at the level of signalling, motility, and evolution. Despite the richness in sperm variations, only a few model systems for signalling and motility have been studied in detail. Using fast kinetic techniques, electrophysiological recordings, and optogenetics, the molecular players and the sequence of signalling events of sperm from a few marine invertebrates, mammals, and fish are being elucidated. Furthermore, recent technological advances allow studying sperm motility with unprecedented precision; these studies provide new insights into flagellar motility and navigation in three dimensions (3D). The scope of this review is to highlight variations in motile sperm across species, and discuss the great promise that 3D imaging techniques offer into unravelling sperm mysteries.
Journal Article
Optimal stopping and impulse control in the presence of an anticipated regime switch
We consider a class of stochastic optimal stopping and impulse control problems where the agent solving the problem anticipates that a regime switch will happen at a random time in the future. We assume that there are only two regimes, the regime switching time is exponentially distributed, the underlying stochastic process is a linear, regular, time-homogeneous diffusion in both regimes and the payoff may be regime-dependent. This is in contrast with most existing literature on the topic, where regime switching is modulated by a continuous-time Markov chain and the underlying process and payoff belong to the same parametric family in all regimes. We state a set of easily verifiable sufficient conditions under which the solutions to these problems are given by one-sided threshold strategies. We prove uniqueness of the thresholds and characterize them as solutions to certain algebraic equations. We also study how anticipation affects optimal policies i.e. we present various comparison results for problems with and without regime switching. It may happen that the anticipative value functions and optimal policies coincide with the usual ones even if the regime switching structure is non-trivial. We illustrate our results with practical examples.
Journal Article
The value of crowdsourced street-level imagery
OpenStreetCam and Mapillary are two increasingly popular online services centered on providing street-level imagery through close association with the OpenStreetMap platform and crowdmapping community. While both services provide crowdsourced street-level imagery, the differences in their aims and operations present an opportunity to discuss the various ways in which commercialization dynamics and crowdmapping practices are reshaping each other in the geoweb. This is significant because crowdmapping relies on massive distributed pools of unpaid labor, and is often characterized by a discourse and identity of community-centered sharing that eschews profit-seeking as a central motive. While the use of OpenStreetMap by commercial products is not new, the emergence of crowdsourced street-level imagery is an innovation with significant consequences. Projects like Mapillary and OpenStreetCam have the potential to both change the collaborative dynamics that drive OpenStreetMap, and simultaneously disrupt the state of street-level imagery ecosystem, which has been dominated by a single private provider: Google Street View. In light of this, crowdourced street-level imagery should be assessed, not only in technical terms, but through the full range of its political-economic ramifications. To this end, in this article we examine the role of commercialization in crowdmapped street-level imagery through a property regimes framework. Using this approach, we identify, analyze, and critique the allocation of rights, roles, and economic value within these services, thus shedding light on the emergence of crowdsourced street-level imagery in the context of the geoweb, and the digital and ‘sharing’ economies.
Journal Article
Elevation and latitude drives structure and tree species composition in Andean forests: Results from a large-scale plot network
Our knowledge about the structure and function of Andean forests at regional scales remains limited. Current initiatives to study forests over continental or global scales still have important geographical gaps, particularly in regions such as the tropical and subtropical Andes. In this study, we assessed patterns of structure and tree species diversity along ~ 4000 km of latitude and ~ 4000 m of elevation range in Andean forests. We used the Andean Forest Network (Red de Bosques Andinos, https://redbosques.condesan.org/) database which, at present, includes 491 forest plots (totaling 156.3 ha, ranging from 0.01 to 6 ha) representing a total of 86,964 identified tree stems ≥ 10 cm diameter at breast height belonging to 2341 identified species, 584 genera and 133 botanical families. Tree stem density and basal area increases with elevation while species richness decreases. Stem density and species richness both decrease with latitude. Subtropical forests have distinct tree species composition compared to those in the tropical region. In addition, floristic similarity of subtropical plots is between 13 to 16% while similarity between tropical forest plots is between 3% to 9%. Overall, plots ~ 0.5-ha or larger may be preferred for describing patterns at regional scales in order to avoid plot size effects. We highlight the need to promote collaboration and capacity building among researchers in the Andean region (i.e., South-South cooperation) in order to generate and synthesize information at regional scale.
Journal Article
Large charge at large N
A
bstract
We apply the large-charge expansion to
O
(
N
) vector models starting from first principles, focusing on the Wilson-Fisher point in three dimensions. We compute conformal dimensions at zero and finite temperature at fixed charge
Q
, concentrating on the regime 1 «
N
«
Q
. Our approach places the earlier effective field theory treatment on firm ground and extends its predictions.
Journal Article
Analyzing the Impact of COVID-19 on Education Professionals. Toward a Paradigm Shift: ICT and Neuroeducation as a Binomial of Action
This study analyzed the current situation of education in the context of the pandemic caused by COVID-19. The worldwide health emergency situation has caused the confinement of people and with it, the closure of centers and the transfer of face-to-face education to online education. Faced with these facts, teachers have had to adapt at a dizzying pace not only to new methodological approaches, but also to their own confinement, presenting high levels of stress. The purpose of this study is to offer a proposal that optimizes the work of education professionals in the current context of a pandemic through the use of Information and Communication Technologies (ICT) under the novel approach of the contributions of neuroeducation in the field of managing emotions and motivational processes, contributing to meaningful learning in students. The symbiosis of ICT and neuroeducation can make a great contribution to the paradigm shift that is taking place today.
Journal Article
Immunological and genomic characterization of Ibizan Hound dogs in an endemic Leishmania infantum region
Background
The Ibizan Hound is a canine breed native to the Mediterranean region, where leishmaniosis is an endemic zoonosis. Several studies indicate low prevalence of this disease in these dogs but the underlying molecular mechanism remains unknown.
Methods
In this study, qualitative immunological and genomic profiles of this breed have been analyzed.
Results
Our analysis shows relevant differences between the cytokine serum profile of Ibizan Hound dogs and previously published data from other canine strains. Additionally, several genetic risk variants related to the immune response, regulation of the immune system, and genes encoding cytokines and their receptors have been studied. The most relevant genes that presented such fixed polymorphisms were
IFNG
and
IL6R.
Other variants with frequencies ≥ 0.7 were found in the genes
ARHGAP18
,
DAPK1
,
GNAI2
,
MITF
,
IL12RB1, LTBP1, SCL28A3
,
SCL35D2, PTPN22, CIITA
,
THEMIS
, and
CD180
. Epigenetic regulatory genes such as
HEY2
and
L3MBTL3
showed also intronic polymorphisms.
Conclusions
Our analysis and results indicate that the regulation of immune responses is different in Ibizan Hounds compared to other breeds. Future studies are needed to elucidate whether these differences are related to the low prevalence of
L. infantum
infection in the Ibizan Hound.
Graphical Abstract
Journal Article