cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Optimization of the chromatographic conditions of a multi-residue GC-MS method for trace analysis of pesticides and endocrine disruptors in drinking water
Creators: name: Fernandes, Diana
name: Valente, Mariana
name: Ribeiro, Ana Rita
name: Ribeiro, Cláudia
Publisher: name: Scientific Letters
Year: 2024

description: Background: Nowadays, the presence of pesticide residues and endocrine disruptors in sources for abstraction of drinking water has become a serious concern [1,2]. These classes negatively affect the environment, biodiversity, and public health. In this sense, monitoring these compounds in drinking water is essential to ensure its quality and safety on its use. Therefore, the development of sensitive analytical methods able of detecting the presence of these compounds even at residual concentrations is needed [1-3]. Objective: The aim of this study is to develop an analytical procedure by gas chromatography coupled to mass spectrometry (GC-MS) for the simultaneous quantification of different classes of pesticides and endocrine disruptors in drinking water. Methods: A method is being developed to analyze 14 compounds from a wide range of pesticide and endocrine disruptor classes. The latter were derivatized using N-methyl-N-(trimethylsilyl) trifluoroacetamide with 1% trimethylchlorosilane (MSTFA +1% TMCS) reagent and pyridine. Afterwards, the mixture was evaporated, reconstituted in acetate ethyl anhydrous and analyzed by GC-MS. The chromatographic conditions were: a capillary column 5% diphenyl 95% dimethyl polysiloxane (30 m x 0.25 mm x 0.25 μm), the injector temperature set at 280 °C, and a temperature ramp from 70 °C to 280 °C in a total run time of 30 minutes. Results: The target pesticides do not need to be derivatized for analysis, however, since endocrine disruptors require this process, all compounds were subjected to the derivatization step using the optimized conditions for endocrine disruptors, with the aim of including all compounds in the same sample preparation procedure and in a single chromatographic run. Analysis of the results allowed for the distinction and identification of all compounds. Conclusions: Derivatization conditions were optimized, and an analytical chromatographic method was developed allowing the separation and identification of 14 compounds belonging to various classes of pesticides and endocrine disruptors in 30 minutes.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
Ceriana conopsoides
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Ceriana
Ceriana conopsoides

description: Ceriana conopsoides (Linnaeus, 1758).
Regions: GO, CK, SA.
Reference: Strobl (1893a, 1893b, in both as Ceria conopsoides).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 195, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
A mixed precision LOBPCG algorithm
Creators: name: Kressner, Daniel
name: Ma, Yuxin
name: Shao, Meiyue
Publisher: name: arXiv
Year: 2023
Subjects: subject: Numerical Analysis (math.NA)
subject: FOS: Mathematics
subject: 65F15, 65F50

description: The locally optimal block preconditioned conjugate gradient (LOBPCG) algorithm is a popular approach for computing a few smallest eigenvalues and the corresponding eigenvectors of a large Hermitian positive definite matrix A. In this work, we propose a mixed precision variant of LOBPCG that uses a (sparse) Cholesky factorization of A computed in reduced precision as the preconditioner. To further enhance performance, a mixed precision orthogonalization strategy is proposed. To analyze the impact of reducing precision in the preconditioner on performance, we carry out a rounding error and convergence analysis of PINVIT, a simplified variant of LOBPCG. Our theoretical results predict and our numerical experiments confirm that the impact on convergence remains marginal. In practice, our mixed precision LOBPCG algorithm typically reduces the computation time by a factor of 1.4--2.0 on both CPUs and GPUs.
description: 19 pages, 6 figures
A family of permutationally invariant quantum codes
Creators: name: Aydin, Arda
name: Alekseyev, Max A.
name: Barg, Alexander
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: Information Theory (cs.IT)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: We construct a new family of permutationally invariant codes that correct $t$ Pauli errors for any $t\ge 1$. We also show that codes in the new family correct quantum deletion errors as well as spontaneous decay errors. Our construction contains some of the previously known permutationally invariant quantum codes as particular cases, which also admit transversal gates. In many cases, the codes in the new family are shorter than the best previously known explicit permutationally invariant codes for Pauli errors and deletions. Furthermore, our new code family includes a new $((4,2,2))$ optimal single-deletion-correcting code. As a separate result, we generalize the conditions for permutationally invariant codes to correct $t$ Pauli errors from the previously known results for $t=1$ to any number of errors. For small $t$, these conditions can be used to construct new examples of codes by computer.
description: v3: Accepted to Quantum. This is the published version of the paper, formatted in the style of the journal
Phytocannabinoid profiling in cannabis extracts: derivatization and gas chromatography optimization
Creators: name: S. Ribeiro, Bibiana
name: Ribeiro, Cláudia
name: J. A. Ribeiro, Carlos
name: P. Silva, Eduarda M.
Publisher: name: Scientific Letters
Year: 2024

description: Background: Cannabis has been used for years for both medicinal and recreational purposes, having its potential therapeutic benefits attributed to cannabinoids [1]. Cannabis-based treatments are gaining popularity, with delta-9-tetrahydrocannabinol (THC) being approved by Food and Drug Administration for chemotherapy side effects and cannabidiol (CBD) for seizures [2,3]. Hence, characterization of chemical extracts of cannabis is imperative for medical purposes and to assess its environmental impact. Gas chromatography coupled with mass spectrometry (GC-MS) is the most common technique used for quantifying cannabinoids in plant extracts due to its high sensitivity [4,5]. Objective: Optimization of the derivatization and chromatographic procedures for cannabinoids analysis. Development of a GC-MS method for the simultaneous quantification of several cannabinoids present in different extracts of the Cannabis sp cultivar ZF plant, a commercially available hybrid weed strain. Methods: Compounds were derivatized using N-methyl-N-trimethylsilyltrifluoroacetamide with 1% trimethylchlorosilane (MSTFA + 1% TMCS) and pyridine and heated at 60 ˚C for 30 min. Subsequently, the solution was evaporated, reconstituted in anhydrous ethyl acetate, and analyzed by GC-MS. The chromatographic conditions were established using a capillary column containing 5% diphenyl-95% dimethylpolysiloxane (30 m × 0.25 mm × 0.25 µm), an injector temperature set to 280 ºC, with a temperature ramp starting at 100 ºC and increasing up to 280 ºC at a flow rate of 1 mL/min to a total run of 20 min. Results: Different proportions of MSTFA + 1% TMCS and pyridine, heating temperature and time were attempted for optimization of the derivatization conditions. Established conditions allowed the identification of cannabinoids while preventing the decarboxylation of the more sensitive acidic cannabinoids. Chromatographic conditions were also optimized to allow the simultaneous separation of the compounds in the same run. Conclusions: Derivatizations conditions were optimized, and gas chromatographic conditions were established for the analysis of cannabinoids in cannabis extracts.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
Callicera aenea
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Callicera
Callicera aenea

description: Callicera aenea (Fabricius, 1777).
Region: CL.
Reference: de Groot et al. (2010).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 194, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Cladistic Tests of Hypotheses Concerning Evolution of Xerophytes and Mesophytes Within Tillandsia Subg Phytarrhiza (Bromeliaceae)
Creators: name: Gilmartin, A. J.
name: Brown, Gregory K.
Publisher: name: University of Wyoming. Libraries
Year: 2024
Subjects: Botany

description: Tillandsia L. Subg. Phytarrhiza (Visiani) Baker (Bromeliaceae) is a distinctive group of about 35 epiphytic species. These exhibit a range of habits from xeric to mesic. The evolutionary relationships of the contrasting adaptations need to be established here as well as in the subfamily as a whole. Relations between the subgenus and other tillandsioids are problematical and phylogenetic reconstruction of its member-species would be facilitated by identification of Phytarrhiza's relative (sister taxon) sharing the same most recent common ancestor with Phytarrhiza. This paper examines the two most likely sister taxa, Subg. Pseudo-Catopsis Baker and Subg. Diaphoranthema (Beer) Baker. Diaphoranthema is rejected as sister taxon. The accepted evolutionary tree, rooted by Pseudo-Catopsis, indicates that most habital evolutionary changes in Phytarrhiza have been between mesic and semi-mesic forms and from mesic to xeric forms. Methods developed for testing specific evolutionary hypotheses are broadly applicable.
title: Baltic Cod Reproduction In The Gotland Basin: Annual Variability And Possible Causes
Creators: name: Plikshs, M.
name: Hinrichsen, H.-H.
name: Köster, F.
name: Tomkiewicz, J.
name: Berzins, V.
Publisher: name: ASC 1999
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.Baltic cod spawning takes place in the deep basins and reproduction success is mainly related to environmental conditions (salinity and oxygen regimes, i.e. the 'reproduction volume'). Due to the Baltic Sea heterogeneity, cod reproduction success in the Southern and Central Baltic spawning grounds can differ significantly. Recent oceanographic changes i.e. decrease of water exchange and stagnation, as well as a strong reduction of spawning stock caused the diminishing of the reproduction potential of the Gotland spawning grounds. The Gotland spawning grounds belong to four main cod spawning sites in the Baltic and historical analyses revealed that abundant generations of Baltic cod were produced when successful cod reproduction took place also·in the Gotland Basin. Analyses of revised reproduction volume estimates for the Gotland Basin taking into account the spatial structure of hydrology in the basin during stagnation and aeration periods reveals high seasonal and inter-annual variability. To describe changes of abundance and distribution of the spawning stock and the recruits in relation to hydrographic conditions, results from trawl surveys carried ciut in 1975-1998 in the Gotland Deep are analyzed. In this analysis, the reproduction volume is used as a proxy for the environmental conditions.
Nanhermannia milloti BALOGH 1960
Creators: name: Mahunka, S.
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Sarcoptiformes
Nanhermanniidae
Nanhermannia
Nanhermannia milloti

description: Nanhermannia milloti BALOGH, 1960   (Figs 10–11)
The newly found and examined specimens surely belong to the species described by BALOGH. But the interlamellar setae are considerably longer and thicker than the one given in the figure of Balogh. At the same time the sensillus possesses a slightly shorter and thicker head. The species is also charecterised by the extraordinarily large basal tubercles (usually 3–4) and the variable foveoles of the notogaster (Figs 10 –171).
description: Published as part of Mahunka, S., 2009, Oribatid Mites From The Vohimana Reserve (Madagascar) (Acari: Oribatida) I., pp. 89-122 in Acta Zoologica Academiae Scientiarum Hungaricae 55 (2) on page 96, DOI: 10.5281/zenodo.12584807
Development and validation of an analytical method to quantify cytotoxic drugs in gauze dressings used in luer-lock connection systems for a safer preparation
Creators: name: Silva, Clara
name: Carmo, Helena
name: Oliveira, Vânia
name: Carvalho, Daniel
name: Moreira, Fernando
Publisher: name: Scientific Letters
Year: 2024

description: Background: Despite patient´s benefits, healthcare professionals face occupational hazardous when handling cytotoxic drugs used for cancer treatment [1]. Several organizations outline procedures, conditions, and equipment recommended for safe handling. The International Society of Oncology Pharmacy Practice (ISOPP) standards [2] are the guidelines recommended by the European Parliament but, unlike others (e.g. Occupational Safety and Health Administration (OSHA)) [3], they omit the recommendation of using dressings at luer-lock connections to contain cytotoxic leaks. Objective: This study aims to develop and validate an analytical method for cyclophosphamide (CP) and 5-fluorouracil (5-FU) identification and quantification in gauze dressings for monitoring real-life occupational situations. Methods: Gauze dressings (20x10 cm) containing varying concentrations of CP and 5-FU were placed in 15 mL falcon tubes containing acetonitrile:methanol:water (19:13:68). After stirring, the samples were filtered through a 0.22 µm filter and analyzed using HPLC-DAD, equipped with a C18 column (Hypersil Gold ™ 150mm x 4.6mm and 5µm particle size). The mobile phases employed were acetonitrile:methanol:water (19:13:68) (CP) and 0.5% acetic acid in water (for 5-FU), with detection set at 205 nm (CP) and 260 nm (5-FU). Results: The mean of five calibration curves was calculated for each drug, each exhibiting R² > 0.997, confirming the linearity for both drugs. Regarding sensitivity, LOD of 0.006 µg/cm2 (5-FU) and 0.11 µg/cm2 (CP) and LOQs of 0.02 µg/cm2 (5-FU) and 0.32 µg/cm2 (CP), were obtained. Accuracy ranged between 93%-110%, while precision ranged between 91%-99%. At room temperature, gauze dressings deliberately contaminated exhibited superior stability for 5-FU compared to CP. Conclusions: The method has been successfully validated for analyzing CP and 5-FU residues in gauze, meeting essential validation criteria. Upon suitability verification, the method will be applicable for the evaluation of the importance of using gauze dressing when handling cytotoxic drugs, by assessing contaminations occurring during their real-life handling routine.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
Can REDD+ Save the Forest?: The Role of Payments and Tenure
Creators: name: Barbier, Edward B.
name: Tesfaw, Anteneh T.
Publisher: name: University of Wyoming. Libraries
Year: 2012
Subjects: ENVIRONMENTAL SERVICES; AVOIDED DEFORESTATION; CARBON SEQUESTRATION; ECOSYSTEM SERVICES; LOCAL ENFORCEMENT; CONSERVATION; EMISSIONS; BENEFITS; GOVERNANCE; COMMUNITY
Business

description: A recent policy response to halting global forest deforestation and degradation, and any resulting greenhouse gas emissions is REDD+, which also includes the role of conservation, sustainable management of forests and enhancement of forest carbon stocks. Although still in its infancy, the success of REDD+ will depend significantly on whether it can be economically viable and if any resulting payments are sufficient to cover the opportunity cost plus any transaction cost. Where tenure security over forest is weak, REDD+ can pose a risk for forest communities, who could be dispossessed, excluded and marginalized. This review of existing studies explores how payment for avoided deforestation, and forest tenure impact the success of REDD+ projects in terms of effectiveness, efficiency and equity. Effectiveness refers to the difference between deforestation with and without REDD+, efficiency refers to avoiding deforestation at minimal cost, and equity refers to the implication of REDD+ on benefit sharing. We conclude that the potential success or failure of REDD+ as a means to reduce deforestation and carbon emission on forest commons depends critically on designing projects that work within existing informal tenure institutions to ensure that carbon storage benefits align with livelihood benefits.
Chalcosyrphus femoratus
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Chalcosyrphus
Chalcosyrphus femoratus

description: Chalcosyrphus femoratus (Linnaeus, 1758).
Regions: CL, UC.
Reference: de Groot & Govedič (2008).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 195, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Cell Division and Motility Enable Hexatic Order in Biological Tissues
Creators: name: Tang, Yiwen
name: Chen, Siyuan
name: Bowick, Mark J.
name: Bi, Dapeng
Publisher: name: arXiv
Year: 2023
Subjects: subject: Soft Condensed Matter (cond-mat.soft)
subject: Disordered Systems and Neural Networks (cond-mat.dis-nn)
subject: Biological Physics (physics.bio-ph)
subject: FOS: Physical sciences

description: Biological tissues transform between solid-like and liquid-like states in many fundamental physiological events. Recent experimental observations further suggest that in two-dimensional epithelial tissues these solid-liquid transformations can happen via intermediate states akin to the intermediate hexatic phases observed in equilibrium two-dimensional melting. The hexatic phase is characterized by quasi-long-range (power-law) orientational order but no translational order, thus endowing some structure to an otherwise structureless fluid. While it has been shown that hexatic order in tissue models can be induced by motility and thermal fluctuations, the role of cell division and apoptosis (birth and death) has remained poorly understood, despite its fundamental biological role. Here we study the effect of cell division and apoptosis on global hexatic order within the framework of the self-propelled Voronoi model of tissue. Although cell division naively destroys order and active motility facilitates deformations, we show that their combined action drives a liquid-hexatic-liquid transformation as the motility increases. The hexatic phase is accessed by the delicate balance of dislocation defect generation from cell division and the active binding of disclination-antidisclination pairs from motility. We formulate a mean-field model to elucidate this competition between cell division and motility and the consequent development of hexatic order.
description: 13 pages, 12 figures (6 in the main, 6 in the supplementary)
Metrology and multipartite entanglement in measurement-induced phase transition
Creators: name: Di Fresco, Giovanni
name: Spagnolo, Bernardo
name: Valenti, Davide
name: Carollo, Angelo
Publisher: name: arXiv
Year: 2023
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Measurement-induced phase transition arises from the competition between a deterministic quantum evolution and a repeated measurement process. We explore the measurement-induced phase transition through the Quantum Fisher Information in two different metrological scenarios. We demonstrate through the scaling behavior of the quantum Fisher information the transition of the multi-partite entanglement across the phases. In analogy with standard quantum phase transition, we reveal signature of a measurement-induced phase transition in the non-analytic behaviour of the quantum Fisher information as the measurement strength approaches the critical value. Our results offer novel insights into the features of a quantum systems undergoing measurement-induced phase transition and indicate potential avenues for further exploration in the field of quantum physics.
Counterfactual Edits for Generative Evaluation
Creators: name: Lymperaiou, Maria
name: Filandrianos, Giorgos
name: Thomas, Konstantinos
name: Stamou, Giorgos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Evaluation of generative models has been an underrepresented field despite the surge of generative architectures. Most recent models are evaluated upon rather obsolete metrics which suffer from robustness issues, while being unable to assess more aspects of visual quality, such as compositionality and logic of synthesis. At the same time, the explainability of generative models remains a limited, though important, research direction with several current attempts requiring access to the inner functionalities of generative models. Contrary to prior literature, we view generative models as a black box, and we propose a framework for the evaluation and explanation of synthesized results based on concepts instead of pixels. Our framework exploits knowledge-based counterfactual edits that underline which objects or attributes should be inserted, removed, or replaced from generated images to approach their ground truth conditioning. Moreover, global explanations produced by accumulating local edits can also reveal what concepts a model cannot generate in total. The application of our framework on various models designed for the challenging tasks of Story Visualization and Scene Synthesis verifies the power of our approach in the model-agnostic setting.
Empirical Assessment of Theory for Bankfull Characteristics of Alluvial Channels
Creators: name: Trampush, S. M.
name: Huzurbazar, Snehalata V.
name: McElroy, Brandon
Publisher: name: University of Wyoming. Libraries
Year: 2014
Subjects: alluvial channels

description: We compiled a data set of 541 bankfull measurements of alluvial rivers (see supporting information) and used Bayesian linear regression to examine empirical and theoretical support for the hypothesis that alluvial channels adjust to a predictable condition of basal shear stress as a function of sediment transport mode. An empirical closure based on channel slope, bankfull channel depth, and median grain size is proposed and results in the scaling of bankfull Shields stress with the inverse square root of particle Reynolds number. The empirical relationship is sufficient for purposes of quantifying paleohydraulic conditions in ancient alluvial channels. However, it is not currently appropriate for application to alluvial channels on extraterrestrial bodies because it depends on constant-valued, Earth-based coefficients.
Efficient cannabinoid extraction using FlackTek technology
Creators: name: Vitiello, Antonella
name: Lombardi, Annunziata
name: J. A. Ribeiro, Carlos
Publisher: name: Scientific Letters
Year: 2024

description: Background: FlackTek™ technology can enhance product quality and potency by employing a bladeless, non-invasive mixing process. This approach minimizes the requirement for excessive heat, effectively safeguarding the compounds of interest from degradation and damage that can happen during mixing and purging. By achieving uniform distribution and homogeneity, FlackTek combines pulverization and blending, ensuring uniform reduction in particle size and even dispersion across the material resulting in higher-quality products. This technology has been applied in several fields, like3D printing, adhesives and sealants, chemicals, electronics, inks and coatings, medical devices, cosmetics, pharmaceuticals, polyurethanes, silicones [1,2]. Several methods have been employed for cannabis extraction, such as, supercritical carbon dioxide and solvent‑based techniques, including Soxhlet extraction, dynamic maceration, and ultrasonic and microwave-assisted extraction [3]. Objective: The goal of this work was to apply FlackTekTM technology to oil cannabis extraction. Methods: THC-dominant cultivar: 5ng of ground flower was mixed with 20 g of MCT oil (1:4). Using FlackTek conditions: 2000 RPM, samples were collected at time points: 5, 10, 15, 20, and 30 min. Extraction following Ph Eur 11.5 cannabis flower monograph was used as reference method. Tetrahydrocannabinolic acid (THCA) and tetrahydrocannabinol (9-THC) content was analyzed in a HPLC-DAD system (Agilent 1260 Infinity II) with a C18 column (Poroshell 120 EC-C18, 3.0 × 50 mm, 2.7 μm) and extraction was performed using a 1200-500Vac FlackTek SpeedMixer. CBD-dominant cultivar: 5 g of ground flower was mixed with 10 g of olive oil (1:2). Using FlackTek conditions: 3500 RPM, samples were collected at time points: 5, 10, and 15 min. Cannabidiolic acid (CBDA) and cannabidiol (CBD) were quantified using a HPLC-DAD system (Thermofisher Ultimate 3000) with a C18 column (Hypersil Gold3UM 150x3 mm) and a FlackTek SpeedMixer DAC330-100 PRO was used for extraction. Results: THCA measurements are within %RSD < 5, indicating that there is no significative difference between the five extraction time points. To confirm that THC is as easily extracted, THCA in the ground flower was first decarboxylated to THC at 120 ºC, for 30 min in an oven, before extraction. Conclusions: FlackTek technology enables rapid and effective extraction of cannabinoids directly into MCT or olive oil. Specifically, THCA/ THC was successfully extracted in just 5 minutes, and CBDA/ CBD in 10 minutes.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
Chalcosyrphus nemorum
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Chalcosyrphus
Chalcosyrphus nemorum

description: Chalcosyrphus nemorum (Fabricius, 1805).
Regions: UC, CL, DR, LS, SA.
Reference: Milankov et al. (1995), de Groot & Govedič (2008).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 195, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
Fine-Grained ImageNet Classification in the Wild
Creators: name: Lymperaiou, Maria
name: Thomas, Konstantinos
name: Stamou, Giorgos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Artificial Intelligence (cs.AI)
subject: FOS: Computer and information sciences

description: Image classification has been one of the most popular tasks in Deep Learning, seeing an abundance of impressive implementations each year. However, there is a lot of criticism tied to promoting complex architectures that continuously push performance metrics higher and higher. Robustness tests can uncover several vulnerabilities and biases which go unnoticed during the typical model evaluation stage. So far, model robustness under distribution shifts has mainly been examined within carefully curated datasets. Nevertheless, such approaches do not test the real response of classifiers in the wild, e.g. when uncurated web-crawled image data of corresponding classes are provided. In our work, we perform fine-grained classification on closely related categories, which are identified with the help of hierarchical knowledge. Extensive experimentation on a variety of convolutional and transformer-based architectures reveals model robustness in this novel setting. Finally, hierarchical knowledge is again employed to evaluate and explain misclassifications, providing an information-rich evaluation scheme adaptable to any classifier.
The Contribution of Knowledge in Visiolinguistic Learning: A Survey on Tasks and Challenges
Creators: name: Lymperaiou, Maria
name: Stamou, Giorgos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: Artificial Intelligence (cs.AI)
subject: Computer Vision and Pattern Recognition (cs.CV)
subject: FOS: Computer and information sciences

description: Recent advancements in visiolinguistic (VL) learning have allowed the development of multiple models and techniques that offer several impressive implementations, able to currently resolve a variety of tasks that require the collaboration of vision and language. Current datasets used for VL pre-training only contain a limited amount of visual and linguistic knowledge, thus significantly limiting the generalization capabilities of many VL models. External knowledge sources such as knowledge graphs (KGs) and Large Language Models (LLMs) are able to cover such generalization gaps by filling in missing knowledge, resulting in the emergence of hybrid architectures. In the current survey, we analyze tasks that have benefited from such hybrid approaches. Moreover, we categorize existing knowledge sources and types, proceeding to discussion regarding the KG vs LLM dilemma and its potential impact to future hybrid approaches.
Knowledge-Based Counterfactual Queries for Visual Question Answering
Creators: name: Stoikou, Theodoti
name: Lymperaiou, Maria
name: Stamou, Giorgos
Publisher: name: arXiv
Year: 2023
Subjects: subject: Computation and Language (cs.CL)
subject: FOS: Computer and information sciences

description: Visual Question Answering (VQA) has been a popular task that combines vision and language, with numerous relevant implementations in literature. Even though there are some attempts that approach explainability and robustness issues in VQA models, very few of them employ counterfactuals as a means of probing such challenges in a model-agnostic way. In this work, we propose a systematic method for explaining the behavior and investigating the robustness of VQA models through counterfactual perturbations. For this reason, we exploit structured knowledge bases to perform deterministic, optimal and controllable word-level replacements targeting the linguistic modality, and we then evaluate the model's response against such counterfactual inputs. Finally, we qualitatively extract local and global explanations based on counterfactual responses, which are ultimately proven insightful towards interpreting VQA model behaviors. By performing a variety of perturbation types, targeting different parts of speech of the input question, we gain insights to the reasoning of the model, through the comparison of its responses in different adversarial circumstances. Overall, we reveal possible biases in the decision-making process of the model, as well as expected and unexpected patterns, which impact its performance quantitatively and qualitatively, as indicated by our analysis.
Development and validation of an on-line SPE coupled to liquid chromatography with fluorescence detection method for the quantification of bisphenol A in human saliva
Creators: name: Prost-Tournier, Oséa
name: Rocha, Lígia
name: Pinho, Teresa
name: Tiritan, Maria Elizabeth
name: Gonçalves, Virgínia
Publisher: name: Scientific Letters
Year: 2024

description: Background:
 Resin-matrix composites, commonly used in dentistry, often contain derivatives of Bisphenol A (BPA) such as Bisphenol A-Diglycidyl Methacrylate and Bisphenol A-Dimethacrylate in their organic matrix composition [1]. Although BPA is not a direct ingredient of these composites, it may be present as a contaminant or degradation product, potentially released into the oral cavity following dental restoration. BPA is an endocrine disruptor that can interfere with the body’s hormone-regulating endocrine system. Thus, the development of sensitive and specific analytical methods for its detection and quantification of BPA in biological matrices is crucial due to its prevalence and potential impact on human health [2]. Objective:This study aimed to develop and validate an on-line solid phase extraction method coupled with liquid chromatography and fluorescence detection (SPE-HPLC-FD) for quantifying BPA in human saliva. Methods: Prior to on-line SPE-HPLC-FD analysis, 6 mL of acetonitrile were added to a 2 mL saliva aliquot to precipitate proteins. The supernatant was then evaporated and reconstituted in a 2 mL solution of 5% ethanol. A 500 µL aliquot was directly injected into the HPLC system. The initial step involved sample clean-up in the on-line SPE column (Restricted Access Media column; RP-18 ADS-20 mm × 4 mm; 25 mm) in the first dimension, the retained components were automatically transferred to the analytical column (Luna PFP (2) column-150 mm × 4.6 mm; 3 mm, 100 Å) for component resolution and subsequent fluorescence detection in the second dimension. Results: The developed method was validated according to the ICH Guidelines [3] and revealed to be linear over the dynamic range of 5.0 ng/mL and 50 ng/mL, with accuracy and precision ranging between 89.9-104.9% and 1.1-6.7%, respectively. Recoveries ranged from 91.5% to 97.1%. Conclusions: The developed method required low sample volume and allowed for automation, simplification, short time analysis and low solvent consumption. This method represents a significant advancement in the detection and quantification of BPA in biological matrices.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
title: Time And Duration Of Spawning Of Cod In Icelandic Waters
Creators: name: Marteinsdottir, Guðrun
name: Björnsson, Höskuldur
Publisher: name: ASC 1999
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.Time and duration of spawning among cod on the main spawning grounds southwest of Iceland, varies from one year to another, as well as within spawning seasons between different size/age groups of spawning females. In 1994 - 1997, onset and duration of spawning was found to be related to size and age of females where larger and older females started spawning earlier and over a longer time period than the smaller and younger females. A similar, however, less distinct trend is seen in 1998 and 1999, where larger females started spawning later than during the years1994-1997. The influence of stock and environmental factors, including the effects of changing stock structure, female condition, temperature, feeding conditions and the distribution of capelin on the time and duration of spawning is discussed.
AYOLLARNING SIYOSATDAGI ROLINI KUCHAYTIRISH UCHUN  IMAGE-MAKING MARKAZLARI FAOLIYATINI YO'LGA QO'YISH
Creators: name: Mirzaaliyeva Aziza Musurmon qizi National University of Uzbekistan, Faculty of Social Sciences, field of applied political science, 1st year graduate student
Publisher: name: Zenodo
Year: 2024

description:  

Annotatsiya. Maqolada bugungi kunda yangi O’zbekistonning dolzarb masalasiga aylangan mavzu ya’ni xotin- qizlarning ijtimoiy - siyosiy faolligini oshirish, ularning bilim va salohiyatidan kelib chiqqan holda siyosatdagi rolini kuchaytirish chora tadbirlariga urg’u berilgan. Respublikada olib borilayotgan o’zgarishlar va qabul qilinayotgan qonunlar, ijtimoiy - siyosiy jarayonlar chuqur tahlil qilindi. Olingan ma’lumotlarga asoslanib yechimlar va xulosalar taqdim etildi. Jamiyatimizdagi ayollarning siyosiy savodxonligini oshirish, ularni boshqaruv jarayonlariga qiziqtirish uchun xizmat qiladigan image - making markazlarga zaruriyat kun sayin ortib boryotganini hisobga olib, chet el tajribasiga tayangan holda bunday markazlar faoliyatini yo’lga qo’yish uchun tavsiyalar berildi.

Tayanch so’zlar:  siyosatchi ayol, siyosiy savodxonlik, imidj, image- making markazlari,ijtimoiy - siyosiy faollik, asosiy omillar, tadqiqot , media- training.
Optimization of the derivatization procedure for the separation of the stereoisomers of 1,3-dimethylamylamine (1,3-DMAA) by gas chromatography - preliminary data
Creators: name: Mexia-De-Almeida, Maria
name: Dias Da Silva, Diana
name: Dinis-Oliveira, Ricardo Jorge
name: Ribeiro, Cláudia
Publisher: name: Scientific Letters
Year: 2024

description: Background: 1,3-Dimethylamylamine (1,3-DMAA), also known as methylhexanamine, is a central nervous system stimulant with structural similarities with amphetamines and therefore presenting overlapping biological and detrimental effects [1]. Despite being banned, the presence of 1,3-DMAA in doping controls and dietary supplements continues to be of significant concern. This molecule has two stereogenic centres and thus four stereoisomers [2]. It is widely recognized that enantiomers may exhibit different biological activity, including pharmacokinetics, pharmacodynamics, and toxicity. Consequently, the development of analytical methods for enantioselective separation of 1,3-DMAA is crucial for an accurate determination of the risks associated with each of these stereoisomers. Objective: To develop an indirect method by gas chromatography coupled to mass spectrometry (GC-MS) for the separation and identification of the stereoisomers of the 1,3-DMAA. Methods: 1,3-DMAA was regenerated with sodium hydroxide, extracted with 0.1% triethylamine in hexane and then derivatized using the enantiomeric pure reagent (R)-(-)-α-methoxy-α-(trifluoromethyl)phenylacetyl chloride ((R)-MTPA-Cl). Subsequently, the sample was evaporated, reconstituted in anhydrous ethyl acetate, and analyzed by GC-MS. The chromatographic conditions were established using a capillary column containing 5% diphenyl-95% dimethylpolysiloxane (30 m × 0.25 mm × 0.25 µm), an injector temperature set to 280 ºC, with a temperature ramp starting at 140 ºC and increasing up to 215 ºC at a flow rate of 1 mL/min to a total run of 12.32 min. Results: As preliminary data indicate, the derivatization procedure allowed the formation of 4 diastereomers of 1,3-DMAA. The chromatographic conditions were optimised, allowing for the separation of the four diastereomers within 12 min. Conclusions: Derivatization and chromatographic conditions were established for enantioselective separation of 1,3-DMAA by GC-MS. Further validation of the method will be crucial for understanding the diastereomers' differential pharmacokinetics and pharmacodynamics, and consequently, the perils associated with their presence in food supplement samples.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)
Chalcosyrphus piger
Creators: name: Kočić, Anja
name: Vujić, Ante
name: Tot, Tamara
name: Milosavljević, Marina Janković
name: Groot, Maarten De
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Syrphidae
Chalcosyrphus
Chalcosyrphus piger

description: Chalcosyrphus piger (Fabricius, 1794).
Regions: GO, CL.
Reference: de Groot & Govedič (2008).
description: Published as part of Kočić, Anja, Vujić, Ante, Tot, Tamara, Milosavljević, Marina Janković & Groot, Maarten De, 2023, An updated checklist of the hoverflies (Diptera: Syrphidae) of Slovenia, pp. 189-227 in Zootaxa 5297 (2) on page 195, DOI: 10.11646/zootaxa.5297.2.2, http://zenodo.org/record/7993180
title: Relations Between The Year Class Strength Of The Western Bal Tic Cod And Inflow Events In The Autumn
Creators: name: Oeberst, R.
name: Bleil, M.
Publisher: name: ASC 1999
Year: 2024
Subjects: Fisheries and aquaculture

description: No abstracts are to be cited without prior reference to the author.The year class strength of the western Baltic cod stock varied considerably in the last years. After a strong year class 1994 a very low year class 1995 followed. Stronger year classes growing up again 1996 and 1997 In the following paper possible reasons for this fluctuation are analysed. Experiments according to spawning activities of captive cod under controlled condition in a marine hatchery suggested, that the year class strength is also influenced by the body condition (energetic status) of the females at the beginning of spawning activities. Furthermore it was possible to demonstrate, that the body condition influences the portion of oocytes in the gonads which is really spent in the spawning season. The investigations showed additionally that the fertilisation rate of spawned eggs is also dependent of the body condition of female cod. Following these results the relations between the fluctuating year class strength of cod in the western Baltic Sea and the temporal shift of the annual maturity development as well as the different portion of females, which takes part in the spawning activities, were analysed. It seems to be that inflow events in the autumn cause temporal shifts of annual maturity development and changes in the portion of really spawning individuals in the following spnng.
Spectral proper orthogonal decomposition of harmonically forced turbulent flows
Creators: name: Heidt, Liam
name: Colonius, Tim
Publisher: name: arXiv
Year: 2023
Subjects: subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: Many turbulent flows exhibit time-periodic statistics. These include turbomachinery flows, flows with external harmonic forcing, and the wakes of bluff bodies. Many existing techniques for identifying turbulent coherent structures, however, assume the statistics are statistically stationary. In this paper, we leverage cyclostationary analysis, an extension of the statistically stationary framework to processes with periodically varying statistics, to generalize the spectral proper orthogonal decomposition (SPOD) to the cyclostationary case. The resulting properties of the cyclostationary SPOD (CS-SPOD for short) are explored, a theoretical connection between CS-SPOD and the harmonic resolvent analysis is provided, simplifications for the low and high forcing frequency limits are discussed, and an efficient algorithm to compute CS-SPOD with SPOD-like cost is presented. We illustrate the utility of CS-SPOD using two example problems: a modified complex linearized Ginzburg-Landau model and a high-Reynolds-number turbulent jet.
title: Introduction to the Minitrack on towards the future of enterprise systems
Creators: name: Bender, Benedict
name: Gronau, Norbert
Publisher: name: Universität Potsdam
Year: 2024
Subjects: subject: 330 Wirtschaft

description: Enterprise systems have long played an important role in businesses of various sizes. With the increasing complexity of today’s business relationships, pecialized application systems are being used more and more. Moreover, emerging technologies such as artificial intelligence are becoming accessible for enterprise systems. This raises the question of the future role of enterprise systems. This minitrack covers novel ideas that contribute to and shape the future role of enterprise systems with five contributions.
description: Zweitveröffentlichungen der Universität Potsdam : Wirtschafts- und Sozialwissenschaftliche Reihe; 188
A numerical study of bounds in the correlations of fractional quantum Hall states
Creators: name: Kumar, Prashant
name: Haldane, F. D. M.
Publisher: name: arXiv
Year: 2023
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We numerically compute the guiding center static structure factor $\bar S(\bf k)$ of various fractional quantum Hall (FQH) states to $\mathcal{O}\left((k\ell)^6\right)$ where $k$ is the wavenumber and $\ell$ is the magnetic length. Employing density matrix renormalization group on an infinite cylinder of circumference $L_y$, we study the two-dimensional limit using $L_y/ξ\gg 1$, where $ξ$ is the correlation length. The main findings of our work are: 1) the ground states that deviate away from the ideal conformal block wavefunctions, do not saturate the Haldane bound, and 2) the coefficient of $O\left((k\ell)^6\right)$ term appears to be bounded above by a value predicted by field theories proposed in the literature. The first finding implies that the graviton mode is not maximally chiral for experimentally relevant FQH states.
description: 14 pages, 2 figures, minor revisions
Short-term and long-term effects of gadolinium and gadoteric acid exposure on rat kidney and liver functions
Creators: name: Coimbra, Susana
name: Rocha, Susana
name: D. Viana, Sofia
name: Rebelo, Rute
name: Rocha-Pereira, Petronila
name: Valente, Maria João
name: Catarino, Cristina
name: Bronze-Da-Rocha, Elsa
name: Belo, Luís
name: Reis, Flávio
name: Santos-Silva, Alice
Publisher: name: Scientific Letters
Year: 2024

description: Background: There are currently concerns about the safety of gadolinium-based contrast agents (GBCA), as they can release gadolinium [Gd (III)], known to be toxic. Free Gd (III) deposition at different organs, as kidney and liver, has been reported [1,2]. We found that Gd (III) promotes inflammation and fibrosis in proximal tubular cells [3]. GBCA with macrocyclic structure, as gadoteric acid (Gd-DOTA), are considered more stable. Objective: To evaluate the short-term and the long-term effects of Gd (III) and Gd-DOTA exposure on biomarkers of renal and hepatic functions, using an animal model. Methods: In both short-term (48h) and long-term (20 weeks) studies, eight weeks-old male Wistar rats were divided in 3 groups (n=10 each) exposed to: a single dose (0.1 mmol/kg) of Gd (III), of Gd-DOTA (0.1 mmol/kg) or vehicle (control). At the end of protocols, blood was collected and the levels of creatinine, urea, aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were evaluated using routine automated assays; cystatin C was measured by ELISA. Results: In the short-term study (48h), Gd (III) group presented significantly higher values of AST and ALT, and lower urea levels than the control group; Gd-DOTA group presented higher AST values, compared to the control group. Twenty-weeks after exposure, higher values of AST, ALT, and creatinine, than Gd-DOTA and control groups and, lower cystatin levels, compared to the control group, were found for the Gd (III) group. Conclusions: Single exposure to free Gd (III) induced short-term and long-term changes in liver biomarkers; the exposure to Gd-DOTA was associated with fewer short-term disturbances in transaminases, and with no long-term influence in their values. Exposure to Gd-DOTA had little influence in traditional kidney biomarkers. Despite the significantly safer profile for Gd-DOTA, further studies are necessary, testing other biomarkers, to clarify the short-term and the long-term impact of this GBCA.
description: Scientific Letters, Vol. 1 No. Sup 1 (2024)