4,133 research outputs found
Detecting Cognitive Load during Working Memory Tasks utilizing a Digitizer Tablet
The purpose of this line of research is to determine whether the ‘Digitizer’ is a reliable and valid way to measure cognitive load during dual working memory-drawing tasks. A quasi-experimental study was conducted at the University of Arkansas in a research laboratory, and participants included seven right-handed healthy adults with normal or corrected vision and no reading difficulty. The participants were selected on a volunteer basis. The study required participants to draw circles while continuously performing in three conditions – one baseline and two working memory experimental tasks, administered in counterbalanced order. The baseline task was to read an 8th grade level passage at comfortable speed and loudness level. The working memory tasks were symmetry span and operation span tasks. The operation span task required the participants to remember letters in sequence while simultaneously verifying arithmetic operations presented after each letter. The symmetry span task required participants to remember the position of the highlighted square in a grid in sequence while simultaneously determining the symmetricity of a figure presented afterwards. Both tasks were completed while drawing continuous circles on the ‘Digitizer’. A separate repeated measures analysis of variance (ANOVA) was conducted for each measure. A significant omnibus effect was found for the stroke duration measure only. Post-hoc paired tests showed that baseline was higher (p=.01) in stroke duration than in operation span task and symmetry span task. In this literature review, the results and elements of the study are described in full to inform future research. It was initially assumed that the working memory load would be significantly less in the baseline task as compared to the two working memory tasks; however, the data alternatively indicated that it taxed working memory more. With reading comprehension as a reference condition, it is logical to conclude that there is evidence of cognitive load in working memory tasks as measured by manual disfluencies. This literature review outlines potential adaptations and highlights primary weaknesses for future study in this area
Legal Protection for Creative Economic Actors of Intellectual Property as the Debt Guarantee
The development of the creative economy often experiences problems such as limited access to capital; with the enactment of Government Regulation No. 24 of 2022 concerning the Creative Economy, the government facilitates Intellectual Property-Based Financing Schemes through financial services institutions, but in its implementation, there is a need for legal protection for creative economy actors who want to get a source of financing, besides that many people do not understand how the requirements for filing Intellectual Property-based financing due to the intangible nature of the collateral object. This research uses the normative juridical method. This research uses all laws and regulations to examine more deeply related to the research in question. The research results indicate that the requirements for applying for an Intellectual Property-Based Financing Scheme must be registered and have a certificate from the Directorate General of Intellectual Property. Intellectual Property (IP) in question is copyright and patent rights based on Article 16 paragraph (3) of the Copyright Law and Article 108 of the Patent Law. Legal protection of creative economy actors in the Intellectual Property-Based Financing Scheme has been pursued by the government, including the existence of further regulations issued by the Financial Services Authority, which makes creative economy actors avoid conflicts or financing disputes through insurance contracts, preventing theft of ideas by others, providing incentives from the government to register IP, providing legal assistance before the court process, and providing legal assistance in the event of a financing dispute
KAMPUNG VERTIKAL SEBAGAI STRATEGI URBAN RENEWAL DI KAMPUNG LUMUMBA, SURABAYA
Kampung is a settlement that have unique characteristic both in physical and socio-cultural condition. Kampung development process tends to be natural and non-formal, but mainly have faced the environmental degradation and lack of facilities. This forced the government to have some intervention in developing kampung housing by perform an urban renewal. Due to the problem of scarcity of land, urban renewal strategy of kampung has to be developed vertically. This also consider the social context that the rearrangement of kampung area is not done by relocating the local residents, but rearranging the original area to improve the community through environmental, social and economic quality improvement
Boston University Chamber Chorus, March 1, 1995
This is the concert program of the Boston University Chamber Chorus performance on Wednesday, March 1, 1995 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Cantique de Jean Racine, Op. 11 by Gabriel Fauré, Rejoice in the Lamb, Op. 30 by Benjamin Britten, Phänomen by Johannes Brahms, The Cherry Duet from L'amico Fritz by Pietro Mascagni, "Sous le dome épais," from Lakmé by Léo Delibes, Two Choruses by Gioachino Rossini, and Neighbor's Chorus from La jolie Parfumeuse by Jacques Offenbach. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
Toxicity, normal tissue and dose-volume planning parameters for radiotherapy in soft tissue sarcoma of the extremities: A systematic review of the literature
BACKGROUND:
Patients with soft tissue sarcoma of the extremities (STSE) are left with high incidence of toxicities after Radiotherapy (RT). Understanding the normal tissue dose relationship with the development of long-term toxicities may enable better RT planning in order to reduce treatment toxicities for STSE. This systematic review of the literature aims at reporting the incidence of acute and late toxicities and identifying RT delineation guidance the normal tissues structures and dose-volume parameters for STSE.
METHODS:
A literature search of PUBMED-MEDLINE for studies that reported data on RT toxicity outcomes, delineation guidelines and dose-volume parameters for STSE from 2000 to 2022. Data has been tabulated and reported.
RESULTS:
Thirty of 586 papers were selected after exclusion criteria. External beam RT prescriptions ranged from 30 to 72 Gy. The majority of studies reported the use of Intensity Modulated RT (IMRT) (27%). Neo-adjuvant RT was used in 40%. The highest long-term toxicities were subcutaneous and lymphoedema, reported when delivering 3DCRT. IMRT had a lower incidence of toxicities. Normal tissue outlining such as weight-bearing bones, skin and subcutaneous tissue, corridor and neurovascular bundle was recommended in 6 studies. Nine studies recommended the use of dose-volume constraints, but only one recommended evidence-based dose-volume constraints.
CONCLUSION:
Although the literature is replete with toxicity reports, there is a lack of evidence-based guidance on normal tissue and dose-volume parameters and strategies to reduce the normal tissues irradiation when optimising RT plans for STSE are poor compared to other tumour sites
The Effect of Disturbance on Plant Communities in Tundra Regions of the Soviet Union
An Annotated List of Plants Inhabiting Sites of Natural and Anthropogenic Disturbances of Tundra Cover: Southeasternmost Chukchi Peninsula -- B.A. Yurtsev and A.A. Korobkov; An Annotated List of Plants Inhabiting Sites of Natural and Anthropogenic Disturbances of Tundra Cover in Western Taimyr: The Settlement of Kresty -- N.V. Matveyeva; A Study of Plant Communities of Anthropogenic Habitats in the Area of the Vorkuta Industrial Center -- O.A. Druzhinina and Yu. G. Zharkov
Skeletal muscle: a significant novel neurohypophyseal hormone-secreting organ
Vasopressin (arg8-vasopressin) and oxytocin are closely relalated hormones, synthesized as pre-hormones in the magnocellular neurons of the paraventricular Q6
and supraoptic nuclei of the hypothalamus. Vasopressin and oxytocin are secreted in response to a variety of physiological stimuli, serving such different functions as controlling water balance, milk ejection, uterine contraction, mood, and parental behavior (Lechan and Toni, 2000; Costa et al., 2014a)
The Role of Eif6 in Skeletal Muscle Homeostasis Revealed by Endurance Training Co-expression Networks
Regular endurance training improves muscle oxidative capacity and reduces the risk of age-related disorders. Understanding the molecular networks underlying this phenomenon is crucial. Here, by exploiting the power of computational modeling, we show that endurance training induces profound changes in gene regulatory networks linking signaling and selective control of translation to energy metabolism and tissue remodeling. We discovered that knockdown of the mTOR-independent factor Eif6, which we predicted to be a key regulator of this process, affects mitochondrial respiration efficiency, ROS production, and exercise performance. Our work demonstrates the validity of a data-driven approach to understanding muscle homeostasis
Gli istoni deiminati come target di autoanticorpi e loro ruolo nella patogenesi dell'artrite reumatoide
Gli anticorpi anti-proteine/peptidi citrullinati (ACPA) sono una famiglia di anticorpi diretti contro sequenze peptidiche in cui l’arginina è sostituita dalla sua forma deiminata, l’aminoacido non naturale citrullina.
Gli ACPA sono presenti esclusivamente nei sieri di artrite reumatoide (AR); la loro presenza è un importante criterio per la diagnosi di AR, mentre poco si conosce riguardo al loro ruolo patogenetico.
La deiminazione è catalizzata da un enzima Ca-dipendente, la peptidil-arginin-deiminasi o PAD. Alcune proteine dell’organismo sono fisiologicamente deiminate (filaggrina, proteina basica della mielina) e molte altre possono esserlo a seguito di processi infiammatori (collagene, fibrina).
Gli istoni possono essere fisiologicamente deiminati (in questo caso il tipo e l’entità della deiminazione ne modificano la capacità di legarsi alla cromatina, costituendo quindi un importante meccanismo di regolazione genica) oppure possono essere deiminati durante un processo di morte cellulare tipico dei neutrofili e definito NETosi.
Lo scopo di questo lavoro di tesi è di valutare:
se gli istoni deiminati in corso di NETosi siano riconosciuti dai sieri di pazienti con AR;
se gli istoni deiminati possano essere utilizzati come antigeni per la determinazione di ACPA nei sieri di AR;
se immunocomplessi ACPA/proteine deiminate possano avere un ruolo patogenetico
Granulociti da sangue periferico sono stati stimolati per attivare la PAD e sottoposti a lisi ed estrazione acida. Le proteine basiche estratte in questo modo sono state separate in SDS-PAGE e sottoposte a immunoblotting con i sieri dei pazienti con AR e con anticorpi anti istoni deiminati e non. Abbiamo osservato che i sieri dei pazienti riconoscono bande a peso molecolare compatibile con quello dell’istone H4 nei granulociti stimolati con calcio ionoforo e non in quelli non stimolati.
Abbiamo quindi indotto in granulociti da sangue periferico la formazione di NET e purificato le proteine coinvolte in questo processo.
Dopo separazione mediante SDS-PAGE e immunoblotting con i sieri dei pazienti con AR e con anticorpi anti istoni deiminati e non, abbiamo osservato che i sieri dei pazienti riconoscono bande a peso molecolare compatibile con quello dell’istone H4 deiminato.
L’istone umano purificato H4 è stato quindi sottoposto a deiminazione in vitro ed utilizzato in un test ELISA. Sono stati evidenziati anticorpi specifici per H4 deiminato nel 13% dei sieri di AR. All’interno dell’istone H4, sono state cercate ed identificate 2 sequenze particolarmente ricche di arginina (H4 aa. 14-34 e aa. 31-50), che sono state sintetizzate sostituendo tutte le arginine con citrulline (H4cit). Anticorpi specifici per H4cit 14-34 sono presenti nel 10% dei sieri di AR e per H4cit 31-50 nel 13%. Le sequenze sono state allora sintetizzate come peptidi antigenici multipli (MAP), ottimizzando il test su fase solida: sono infatti positivi il 67% dei sieri di AR su MAP H4cit 14-34 e il 63% su MAP H4cit 31-50, e meno del 5% dei sieri di soggetti normali e di malattie di controllo.
Alla luce di questi risultati possiamo concludere che l’attivazione di granulociti e la loro formazione di NET sono eventi che possono contribuire alla produzione di istone H4 deiminato che viene poi riconosciuto dai pazienti con AR. Peptidi citrullinati sintetici da esso derivati possono essere utilizzati come substrato per la determinazione di ACPA nel siero dei pazienti con AR
A New Nonparasitic Species of the Holarctic Lamprey Genus Lethenteron Creaser and Hubbs, 1922, (Petromyzonidae) from Northwestern North America with Notes on Other Species of the Same Genus
A new nonparasitic lamprey, Lethenteron alaskense from Alaska and Northwest Territories is described and illustrated. The holotype (No. NMC 76-614) is deposited in the National Museum of Natural Sciences, Ottawa, Canada. The study was based on 67 metamorphosed specimens. The species, by its permanently non-functional intestinal tract and weak dentition, smaller disc and much smaller size (maximum 188 mm), is easily separable from the parasitic Lenthenteron japonicum (maximum length 625 mm) found in the same areas. It is distinguishable from nonparasitic L. lamottenii, found in eastern and southern North America, by 1) a generally weaker dentition but possessing more anterials and supplementary marginals; 2) typically with five velar tentacles as opposed to seven in L. lamottenii; 3) differences in pigmentation pattern of the second dorsal fin and a lack of dark pigmentation on the gular region; 4) smaller size in comparison to 299 mm maximum length in L. lamottenii; and 5) distinct areas of geographical distribution separated from each other by 2400 km. All three, L. alaskense, L. lamottenii, and L. japonicum have usually 66 to 72 trunk myomeres. L. alaskense, by its higher number of myomeres is separable from two other nonparasitic species: L. reissneri from Asia with less than 64 myomeres and L. meridionale from eastern tributaries of the Gulf of Mexico with 50 to 58 myomeres
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