74 research outputs found
Vision Transformer Based Model for Describing a Set of Images as a Story
Visual Story-Telling is the process of forming a multi-sentence story from a
set of images. Appropriately including visual variation and contextual
information captured inside the input images is one of the most challenging
aspects of visual storytelling. Consequently, stories developed from a set of
images often lack cohesiveness, relevance, and semantic relationship. In this
paper, we propose a novel Vision Transformer Based Model for describing a set
of images as a story. The proposed method extracts the distinct features of the
input images using a Vision Transformer (ViT). Firstly, input images are
divided into 16X16 patches and bundled into a linear projection of flattened
patches. The transformation from a single image to multiple image patches
captures the visual variety of the input visual patterns. These features are
used as input to a Bidirectional-LSTM which is part of the sequence encoder.
This captures the past and future image context of all image patches. Then, an
attention mechanism is implemented and used to increase the discriminatory
capacity of the data fed into the language model, i.e. a Mogrifier-LSTM. The
performance of our proposed model is evaluated using the Visual Story-Telling
dataset (VIST), and the results show that our model outperforms the current
state of the art models.Comment: This paper has been accepted at the 35th Australasian Joint
Conference on Artificial Intelligence 2022 (Camera-ready version is attached
Globalization and Regionalization: At a Glance on Debate in Pursuit of Guiding Principles Leading Policy Implications
The debate of Globalization and Regionalization is becoming extensive and significant and in response to these observations, various standpoints, in favor or against, are also emerging and have fueled the debate. Huge complexities are emerging to comprehend what is intended by both. The proponents of both are presenting contrasting, conflicting and debatable explanations and interpretations; however, a clear demarcation between these is still blurry. Due to broadness of both concepts, in this study, instead of making another attempt to provide the summary of different forms, definitions, contradictory or conflicting debate about globalization and regionalization, attention is given on those aspects which are contested by the proponents of regionalization. After rigorous examination and comparisons of various viewpoints of proponents of both, few guidelines are proposed for policy makers to develop some policies to ease the challenge currently micro and macro players are facing about decision making about these two. The policy makers should understand that survival of countries resides in internally connected dynamic and pluralistic business blocs in which the member states not only trade freely but fairly and fearlessly
Global System Fof Mobile-Based Data Acquisition For Monitoring Of Power Distribution System
Modern electrical distribution systems are monitored and controlled remotely using
Supervisory Control and Data Acquisition (SCADA) System. A control center that
receives on-line information about the network must control and monitor the medium
and large power distribution system that usually covers large geographical area.
GSM network currently covers almost all the parts of the country and this makes it
possible in terms of feasibility to place and collect data from distribution power
system using this communication network which reduces the cost of establishing the
system communication for large geographical area like the distribution of power
system.
A prototype of power factor correction and remote data acquisition with control center
based GSM network has been presented in this thesis. The operating parameters of the
power distribution system have been monitored in the control center beside the
operation of the power factor correction. The proposed design of the prototype integrate sensors package with GSM controller which was programmed using Java to
Micro Edition (J2ME). The GSM controller was programmed to control the power
factor and send the acquired information to store it in the database of the control
center. This database will be a useful source for the utility of distribution system after
analyzed it to help the distribution system in monitoring the operational behavior and
identify faults before any problem failure thus resulting in significant cost saving
beside the improve of system reliability. The measurements obtained have a small
error when compared to previous work. The error was 6 mV on a 5000mV scale while
the previous work of Al_Ali et al., (2004(a)) was 10 mV on the same scale. By
sending and receiving Short Message Service (SMS), the system achieves the
functions of data transmitting, data processing, system diagnosing, alarm sending and
report generating
EMPIRICAL TESTING OF HEURISTICS INTERRUPTING THE INVESTOR’S RATIONAL DECISION MAKING
The study aimed to investigate the impact of behavioral biases on investor’s financial decision making. Current research studies the behavioral biases including overconfidence, confirmation, and illusion of control, loss aversion, mental accounting, status quo and excessive optimism. The study is significant for the investors, policy makers, investment advisors, and bankers. Empirical data has been collected through administrating a questionnaire. Correlation and Linear regression model techniques are used to investigate whether investor decision making is affected by these biases. The study concluded that the Confirmation, Illusion of control, Excessive optimism, Overconfidence biases have direct impact on the investor’s decision making while status quo, Loss aversion and Mantel accounting biases have no impact according to data collected from financial institutions
2-(3-Methylbut-2-en-1-yl)-1,2-benzisothiazol-3(2H)-one 1,1-dioxide
In the title compound, C12H13NO3S, a saccharin derivative, the dihedral angle between the aromatic and isothiazole rings is 2.91 (12)°. The planar 3,3-dimethylallyl group [maximum deviation = 0.0086 (16) Å] is oriented at dihedral angles of 71.86 (7) and 74.35 (7)° with respect to the aromatic and isothiazole rings, respectively. In the crystal structure, weak intermolecular C—H⋯O interactions link the molecules into chains along the c axis. A weak C—H⋯π interaction is also present
Simulation of a Standard Store Separated from Generic Wing
Evaluation of store separation experimentally is expensive; time consuming and dangerous as human risks are involved. This results in development of computational methods to simulate the store separation. Store separation studies include store separation simulation and determination of linear and angular displacements of store under the influence of complex and non-uniform flow field of parent aircraft. In order to validate the methodology, the unsteady CFD results, obtained by coupling six degrees of freedom (6-DOF) with flow solver, are compared with experimental results. Major trends are captured which are consistent with experimental results. Variation in store trajectory has been evaluated with different combinations of forward and rearward ejection forces. By increasing the magnitude of forward ejection force vertical displacement increases and store separates more safely from the wing. Moreover, effects of varying parent wing configuration on store trajectory has also been analyzed by incorporation of leading-edge flaps (LEFs). Store always separates in nose down condition due to LEFs which increases vertical displacement of store and thus safety related to store separation is enhanced
Metformin Continuation Versus Holding Pre and Post Coronary Angiography with Normal Renal Function: A Systematic Review and Meta-Analysis
Background
It is common practice to withhold metformin prior to cardiac catheterization due to fear of developing lactic acidosis in the setting of contrast-associated acute kidney injury (AKI). The evidence behind this recommendation is currently weak.
Methods
We collected 851 articles from PubMed and Embase, of which 3 met our inclusion criteria. Inclusion criteria were age \u3e 18 years, baseline use of long-term metformin with continued or interrupted metformin use in patients during diagnostic or interventional cardiac catheterization. The outcomes studied were differences between post-catheterization and pre-catheterization serum creatinine (SCr) and glomerular filtration rate (GFR). We excluded studies dealing with patients not on long-standing metformin and those in which contrast exposure was through contrast enhanced computerized tomography. We used Hedges’s g with inverse variance method to pool standard mean difference with a random effects model using meta-cont module in CRAN-R software with 95% confidence interval (CI) for statistical significance. Higgins I-squared (I²) statistic was used to evaluate heterogeneity.
Results
. Post-catheterization serum creatinine (Hedges’s g = -0.12 mg/dL; CI = -0.83 to +0.6, p = 0.75, I2 = 95%), post-catheterization GFR (Hedges’s g = +0.18 mL/min; CI = -0.76 to +1.11, p = 0.71, I2 = 97%) and post-catheterization lactate levels (Hedges’s g = +0.03 mg/dL; CI = -0.66 to +0.72, p = 0.75, I2 = 95%) failed to reach statistical significance.
Conclusions
There is no statistically significant difference in SCr or GFR between patients who held metformin prior to cardiac catheterization and those who continued taking the medication
Global overview of the management of acute cholecystitis during the COVID-19 pandemic (CHOLECOVID study)
Background: This study provides a global overview of the management of patients with acute cholecystitis during the initial phase of the COVID-19 pandemic. Methods: CHOLECOVID is an international, multicentre, observational comparative study of patients admitted to hospital with acute cholecystitis during the COVID-19 pandemic. Data on management were collected for a 2-month study interval coincident with the WHO declaration of the SARS-CoV-2 pandemic and compared with an equivalent pre-pandemic time interval. Mediation analysis examined the influence of SARS-COV-2 infection on 30-day mortality. Results: This study collected data on 9783 patients with acute cholecystitis admitted to 247 hospitals across the world. The pandemic was associated with reduced availability of surgical workforce and operating facilities globally, a significant shift to worse severity of disease, and increased use of conservative management. There was a reduction (both absolute and proportionate) in the number of patients undergoing cholecystectomy from 3095 patients (56.2 per cent) pre-pandemic to 1998 patients (46.2 per cent) during the pandemic but there was no difference in 30-day all-cause mortality after cholecystectomy comparing the pre-pandemic interval with the pandemic (13 patients (0.4 per cent) pre-pandemic to 13 patients (0.6 per cent) pandemic; P = 0.355). In mediation analysis, an admission with acute cholecystitis during the pandemic was associated with a non-significant increased risk of death (OR 1.29, 95 per cent c.i. 0.93 to 1.79, P = 0.121). Conclusion: CHOLECOVID provides a unique overview of the treatment of patients with cholecystitis across the globe during the first months of the SARS-CoV-2 pandemic. The study highlights the need for system resilience in retention of elective surgical activity. Cholecystectomy was associated with a low risk of mortality and deferral of treatment results in an increase in avoidable morbidity that represents the non-COVID cost of this pandemic
Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi
This article is the ninth in the series of Fungal Diversity Notes, where 107 taxa distributed in three phyla, nine classes, 31 orders and 57 families are described and illustrated. Taxa described in the present study include 12 new genera, 74 new species, three new combinations, two reference specimens, a re-circumscription of the epitype, and 15 records of sexualasexual morph connections, new hosts and new geographical distributions. Twelve new genera comprise Brunneofusispora, Brunneomurispora, Liua, Lonicericola, Neoeutypella, Paratrimmatostroma, Parazalerion, Proliferophorum, Pseudoastrosphaeriellopsis, Septomelanconiella, Velebitea and Vicosamyces. Seventy-four new species are Agaricus memnonius, A. langensis, Aleurodiscus patagonicus, Amanita flavoalba, A. subtropicana, Amphisphaeria mangrovei, Baorangia major, Bartalinia kunmingensis, Brunneofusispora sinensis, Brunneomurispora lonicerae, Capronia camelliaeyunnanensis, Clavulina thindii, Coniochaeta simbalensis, Conlarium thailandense, Coprinus trigonosporus, Liua muriformis, Cyphellophora filicis, Cytospora ulmicola, Dacrymyces invisibilis, Dictyocheirospora metroxylonis, Distoseptispora thysanolaenae, Emericellopsis koreana, Galiicola baoshanensis, Hygrocybe lucida, Hypoxylon teeravasati, Hyweljonesia indica, Keissleriella caraganae, Lactarius olivaceopallidus, Lactifluus midnapurensis, Lembosia brigadeirensis, Leptosphaeria urticae, Lonicericola hyaloseptispora, Lophiotrema mucilaginosis, Marasmiellus bicoloripes, Marasmius indojasminodorus, Micropeltis phetchaburiensis, Mucor orantomantidis, Murilentithecium lonicerae, Neobambusicola brunnea, Neoeutypella baoshanensis, Neoroussoella heveae, Neosetophoma lonicerae, Ophiobolus malleolus, Parabambusicola thysanolaenae, Paratrimmatostroma kunmingensis, Parazalerion indica, Penicillium dokdoense, Peroneutypa mangrovei, Phaeosphaeria cycadis, Phanerochaete australosanguinea, Plectosphaerella kunmingensis, Plenodomus artemisiae, P. lijiangensis, Proliferophorum thailandicum, Pseudoastrosphaeriellopsis kaveriana, Pseudohelicomyces menglunicus, Pseudoplagiostoma mangiferae, Robillarda mangiferae, Roussoella elaeicola, Russula choptae, R. uttarakhandia, Septomelanconiella thailandica, Spencermartinsia acericola, Sphaerellopsis isthmospora, Thozetella lithocarpi, Trechispora echinospora, Tremellochaete atlantica, Trichoderma koreanum, T. pinicola, T. rugulosum, Velebitea chrysotexta, Vicosamyces venturisporus, Wojnowiciella kunmingensis and Zopfiella indica. Three new combinations are Baorangia rufomaculata, Lanmaoa pallidorosea and Wojnowiciella rosicola. The reference specimens of Canalisporium kenyense and Tamsiniella labiosa are designated. The epitype of Sarcopeziza sicula is re-circumscribed based on cyto- and histochemical analyses. The sexual-asexual morph connection of Plenodomus sinensis is reported from ferns and Cirsium for the first time. In addition, the new host records and country records are Amanita altipes, A. melleialba, Amarenomyces dactylidis, Chaetosphaeria panamensis, Coniella vitis, Coprinopsis kubickae, Dothiorella sarmentorum, Leptobacillium leptobactrum var. calidus, Muyocopron lithocarpi, Neoroussoella solani, Periconia cortaderiae, Phragmocamarosporium hederae, Sphaerellopsis paraphysata and Sphaeropsis eucalypticola
Investigation of the effect of relative humidity on polymers by depth sensing indentation
This article was published in the serial, Journal of Materials Science [© Springer]. The definitive version is available from: http://www.springerlink.com/content/y2g413h8h2l6044m/Stereolithography (SL) resins absorb varying
amounts of moisture dependent on the relative humidities,
which can significantly affect the mechanical properties. In
this work, the influence of relative humidity (RH) on the
mechanical behaviour of an SL resin is investigated using
depth sensing indentation (DSI). The samples were conditioned
by two methods. In the first method, samples were
pre-conditioned at 33.5, 53.8, 75.3 and 84.5% RH using
saturated salt solutions. These preconditioned samples
were tested at 33.5% RH, using a humidity control unit
(HCU) to control RH in the DSI system. In the second
method, samples were conditioned and tested at 33.5, 53.8,
75.3 and 84.5% RH by regulating humidity in the DSI
system using the HCU. Temperature was kept constant at
22.5 C for the conditioning and DSI testing. It was seen
that hardness and modulus decreased with increasing RH
and conditioning time but recovered significantly when
tested after drying. This study demonstrates that RH needs
to be taken into account during the DSI testing of
polymers
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