Miracle-dz/UniFAR-FTUs huggingface dataset:
State‐of‐the‐Art Aluminum Porphyrin‐based Heterogeneous Catalysts for the Chemical Fixation of CO2 into Cyclic Carbonates at Ambient Conditions

A series of metalloporphyrin‐based hyper‐crosslinked polymers (M‐HCPs: M=Al, Co, Fe, Mn) has been directly synthesized through Friedel–Crafts alkylation reactions. The M‐HCPs afforded abundant permanent nanopores, high Brunauer–Emmett–Teller (BET) surface area, and exceptional CO2/N2 adsorptive selectivity. The experimental results suggested that the hollow tubular Al‐HCP exhibited extraordinary catalytic performance in the solvent‐free synthesis of cyclic carbonates from epoxides and CO2 by using tetrabutylammonium bromide as a cocatalyst under mild conditions, which was clearly superior to the corresponding homogeneous analogue. Surprisingly, a high turnover frequency (TOF) value of 14 880 h−1 was achieved with propylene oxide at 100 °C and 3.0 MPa, which was a promising result for industrial production compared with previously reported heterogeneous catalysts. More interestingly, Al‐HCP could smoothly catalyze the cycloaddition reaction, producing the corresponding cyclic carbonates by using simulated flue gas (15 % CO2 and 85 % N2 in volume) as the raw material under ambient conditions. Moreover, Al‐HCP could be readily recycled and efficiently reused more than ten times, exhibiting excellent stability.
Pengembangan Lembar Kegiatan Peserta Didik (LKPD) Berbasis RMS (Reading, Mind Mapping, and Sharing) pada Pembelajaran Kimia

Abstrak : Penelitian ini bertujuan untuk mengembangkan Lembar Kegiatan Peserta didik (LKPD) Berbasis RMS pada Materi Stoikiometri yang valid berdasarkan aspek kelayakan isi, karakteristik RMS, kebahasaan, sajian dan kegrafisan. Jenis penelitian ini adalah penelitian pengembangan (research and development) dengan proses pengembangan mengacu kepada model pengembangan 4-D. Objek penelitian ini adalah bahan ajar yaitu Lembar Kegiatan Peserta Didik (LKPD) berbasis RMS. Instrumen pengumpulan data adalah lembar validasi yang diberikan kepada tiga validator, dan dari hasil analisis data diperoleh validitas pada aspek kelayakan isi, karakteristik RMS, kebahasaan, sajian dan kegrafisan berturut-turut yaitu sebesar 95,24%, 95,83%, 98,33%, 97,92% dan 93,75% dengan kategori valid. LKPD yang telah valid menurut validator diujikan kepada 20 orang peserta didik dan mendapatkan hasil respon dengan persentase sebesar 92,71 % dengan kriteria sangat baik, serta oleh dua orang guru dan mendapatkan hasil respon dengan skor sebesar 3,5 dengan kriteria sangat baik. Berdasarkan hasil analisis data dapat disimpulkan bahwa Lembar Kegiatan Peserta Didik (LKPD) berbasis RMS yang dihasilkan dinyatakan valid dan dapat digunakan pada mata pelajaran kimia SMA pada materi stoikiometri.
The NRA in Crisis: Social Identities and Publics’ Cognitive and Affective Evaluations

Contextualized in the Florida Parkland high school mass shooting and National Rifle Association (NRA) crisis, our study is among the first to apply the social identity theory in understanding simultaneously publics’ cognitive and affective evaluations of a non-profit organization’s crisis response. Results from an online survey (N = 603) revealed that participants displayed a range of both negative and positive emotions towards the NRA, including anger, disgust, and interest and hope. On the rational side, publics considered NRA’s actions as harmful and unjust. Publics’ NRA affiliation status and political partisanship identity had a significant main effect on their crisis evaluations.
Pricing of Index Options in Incomplete Markets

This paper provides a new method to reconcile option prices with underlying returns in incomplete markets. Using the returns on the underlying asset, we identify a set of risk-neutral measures associated to a comprehensive class of risk averse investors. From this set, we show how to construct option price bounds and recover the implied gamma: a parameter that uniquely identifies the marginal investor pricing a given option. Empirically, we apply our method to more than two million S&P 500 options. We find that option prices are mostly consistent with underlying returns, as the vast majority of prices lie within the bounds we calculate. Options with different strikes are priced by heterogeneous marginal investors who essentially differ in their assessment of risk in the tails of the return distribution. This heterogeneity is time-varying and decreases during financial crises. From the recovered risk preferences, we find that those associated to compensation for bearing downside risk help predict future market returns. Moreover, the implied gamma allows us to interpret the structure of option prices given the physical distribution. This provides novel insights into the skew patterns of index options before and after the 1987 crash.
Stability Indicating HPLC Method for the Simultaneous Estimation of Triamcinolone Acetonide and Benzyl Alcohol in Pure Form and Epirelefan® Vial

A rapid, sensitive, and accurate stability indicating HPLC method was developed for the simultaneous determination of triamcinolone acetonide and benzyl alcohol in pure form, degradation products and pharmaceutical preparation. The separation was carried out on RP BDS Hypersil® C18 column (150 x 4.60 mm, 5μm) using an isocratic mobile phase composed of acetonitrile: 0.05 M phosphate buffer PH 3.50 (55 : 45). Both benzyl alcohol and triamcinolone acetonide quickly eluted at 1.67 min and 3.42 min, respectively, with a flow rate of 1.50 mL /min and UV detection at 254 nm. The linearity was in the range of 1 – 50 µg/mL for triamcinolone acetonide and 2 - 10 µg/mL for benzyl alcohol. The method has been validated for linearity, accuracy, precision, specificity, limit of detection, limit of quantification, robustness, and ruggedness as per the ICH guidelines. Finally, the method was compared statistically with reference methods indicating that there is no significant difference between them in respect of precision and accuracy.
The Volatility of Stock Investor Returns

The volatility of investor returns depends not only on the volatility of the stocks investors hold but also on their time-varying capital exposure to these holdings. We measure investor returns as dollar-weighted returns (IRRs), and provide comprehensive evidence on the volatility of investor returns using individual stocks, portfolios of stocks, and market indexes from the U.S. and major international stock markets. Our main finding is that the volatility of investor returns is higher than the corresponding volatility of stock returns in nearly all specifications. The relative magnitude of the volatility differential varies from as little as 10% and up to 75%, where this differential tends to increase with investment horizon. Probing into the drivers of this volatility differential reveals that investors tend to "chase stability" but have bad timing, adding capital to stocks after low past volatility but before high future volatility. Overall, taken together with existing evidence that investor returns tend to be lower than corresponding stock returns, this study suggests that the risk-return trade-off for stock investors is worse than previously thought.
From Barriers to Enablers: The Role of Organizational Learning in Transitioning SMEs into the Circular Economy

To contribute to small and medium enterprises’ (SMEs) sustainable transition into the circular economy, the study proposes the activation of organizational learning (OL) processes—denoted here as multi-level knowledge creation, transfer, and retention processes—as a key phase in introducing circular business models (CBMs) at SME and supply chain (SC) level. The research employs a mixed-method approach, using the focus group methodology to identify contextual elements impacting on CBM-related OL processes, and a survey-based evaluation to single out the most frequently used OL processes inside Italian construction SMEs. As a main result, a CBM-oriented OL multi-level model offers a fine-grained understanding of contextual elements acting mutually as barriers and drivers for OL processes, as possible OL dynamics among them. The multi-level culture construct—composed of external stakeholders’, SC stakeholders’, and organizational culture—identify the key element to activate CBM-oriented OL processes. Main implications are related to the identification of cultural, structural, regulatory, and process contextual elements across the external, SC, and organizational levels, and their interrelation with applicable intraorganizational and interorganizational learning processes. The proposed model would contribute to an improved implementation of transitioning into the circular economy utilizing sustainable business models in the construction SMEs.
Insight into mechanism and selectivity of propane dehydrogenation over the Pd-doped Cu(111) surface

The catalytic activity and selectivity of the Pd-doped Cu(111) surface toward the dehydrogenation of propane have been explored by density functional theory calculations with periodic boundary conditions. Four models with different Pd ensembles are introduced to represent the Pd/Cu(111) surface, where a surface single-atom catalyst model is built by alloying Cu with Pd. Calculations reveal that the d band center of the surface Pd atom is upshifted with the increased number of Pd atoms, resulting in an enhanced adsorbate–surface bonding strength and a reduced dehydrogenation barrier. The embedded Pd atoms can significantly improve the catalytic reactivity of the pure Cu surface, whereas the presence of the relatively inactive Cu surface is beneficial for the high selectivity toward propylene dehydrogenation. In general, the Pd/Cu(111) surface with the atomically dispersed palladium catalytic centers demonstrates good balance between the activity, selectivity, thermal stability and the maximum use of the noble metal, and shows great potential in the catalytic production of light olefins.
A Survey of Robots in Healthcare

In recent years, with the current advancements in Robotics and Artificial Intelligence (AI), robots have the potential to support the field of healthcare. Robotic systems are often introduced in the care of the elderly, children, and persons with disabilities, in hospitals, in rehabilitation and walking assistance, and other healthcare situations. In this survey paper, the recent advances in robotic technology applied in the healthcare domain are discussed. The paper provides detailed information about state-of-the-art research in care, hospital, assistive, rehabilitation, and walking assisting robots. The paper also discusses the open challenges healthcare robots face to be integrated into our society.
Characteristic of CD4+CD25+ T Cells in Chronic Myeloid Leukemia Patients Treated with Imatinib Mesylate with Different BCR-ABL Transcripts Levels Response

Background: Several clinical trials on cancer showed a correlation between elevated levels of regulatoryT cells with either poor prognosis or poor response to some therapies. Hence, in this study we tried tomeasure the regulatory T cells (CD4+CD245+) count and to evaluate the program death receptor 1(PD1)as a one of the main suppressive mechanisms that regulatory T cells use in CML patients with differentmolecular response to imatinib therapy. Method: Flow cytometry technique was used to analyze 30 sampleof optimal molecular response of CML patients (BCR-ABL transcripts ? 0.1%) and 30 sample of failuremolecular response patients (BCR-ABL transcripts >1%) with or without hematological failure, in order toassess the CD4+CD25+ T cells (Tregs) and PD1 expression on these cells. Thirty samples age and gendermatched were used as healthy controls. Results: A high proportion of CD4+CD25+ T cells was found infailure groups compared to control and optimal groups(P= 33.7 % washighly significant with high sensitivity and specificity. This value can be used to determine the failure fromthe optimal CML responders. There was no noticeable differences (P= 0.125) in PD1+ expression amongCD4+CD25+ T cells. Conclusion: A high percentage of Treg cells in the failure CML group might be anindication of immune escape of leukemic cells in those patients compared to the other investigated groups.
Towards adaptivity via a new discrepancy principle for Poisson inverse problems

A new form of the discrepancy principle for Poisson inverse problems with compact operators is proposed and discussed in relation to various other proposals. It is shown that filter-induced spectral regularization with a priori chosen smoothing parameter produces estimators that are rate-minimax under source conditions on the estimated function. With the discrepancy principle used for a posteriori choice of the smoothing parameter, the filter-induced solutions are consistent (in probability), but the convergence rates under source conditions are suboptimal, at least in the finitely smoothing case, which often happens when discrepancy principles are used in stochastic inverse problems. Finite sample performance of the proposed procedure applied to a stereological problem of Spektor, Lord and Willis is illustrated with a simulation experiment. MSC2020 subject classifications: Primary 62G05, 93E10, 65J20, 45Q05.
Examining schools as learning organizations: an integrative approach

Purpose The purpose of this study is to examine the applicability of Watkins and Marsick’s model of learning organization in the school context and explore the relationship between the learning dimensions and perceived organizational outcomes. Design/methodology/approach Using the instrument, Dimensions of the Learning Organization Questionnaire (DLOQ), the study collected data from 322 teachers and professional staff in K-12 schools. Confirmatory factor analysis and structural equation modeling provide validity evidence for using the DLOQ in schools. Findings The study results indicate the learning organization is a multidimensional concept and the quality of the school as a learning organization is related to improved organizational performance as perceived by school personnel. Research limitations/implications The study measured perceived organizational outcomes using a sample in an urban school district. Future research is encouraged to expand the study sample and to collect actual performance data to strengthen the findings. Practical implications The study provides reliability and validity evidence for an instrument that school leaders and practitioners can use to assist their evaluation of the school’s capacity as a learning organization to leverage improvement in school performance. Originality/value The study emphasizes an integrative approach in evaluating schools as learning organizations (SLOs) and extends the evidence base for the DLOQ studies. It offers empirical support for the significance of developing SLOs.
Causes and Consequences of Examination Malpractice among Senior Secondary School Students in Eti-Osa L.G.A. of Lagos State, Nigeria

This study investigated the causes and consequences of examination malpractice among senior secondary school students in Eti-Osa Local Government Area of Lagos State, Nigeria. A descriptive survey research method was used for the study as was a simple random sampling technique to select 540 students from twenty selected secondary schools that supplied information to the questionnaire tagged Causes and Consequences of Examination Malpractice Questionnaire (CCEMQ). The instrument was validated by experts in the Department of Social Sciences Education of University of Ilorin. The reliability of the instrument was determined using test re-test method. A reliability coefficient of 0.74 was obtained. The instrument was analysed using percentages and t-test statistics were used to test the hypotheses at a 0.05 level of significance. The findings of the study revealed that the major cause of examination malpractice was sexual harassment by teachers and the main consequence of examination malpractice was that it deprived innocent students’ the opportunity for admission. Findings also revealed that there was no significant difference in the causes of examination malpractice based on gender and age. Based on the results, the researcher recommended that sound educational policy should be put in place with the de-emphasis on the supremacy of certificates over skills and professional competence. There should be improvement in the delivery of instruction especially from the foundational level to the secondary level. Also, stakeholders should stop leap services to examination malpractice.
Killer whale movements on the Norwegian shelf are associated with herring density

Killer whales Orcinus orca have a cosmopolitan distribution with a broad diet ranging from fish to marine mammals. In Norway, killer whales are regularly observed feeding on overwintering Norwegian spring-spawning (NSS) herring Clupea harengus inside the fjords. However, their offshore foraging behavior and distribution are less well understood. In particular, it is not known to what degree they rely on the NSS herring stock when the herring move to deeper offshore waters. Satellite telemetry data from 29 male killer whales were analyzed to assess whether their offshore foraging behavior is linked to herring distribution. Unlike most marine predator-prey studies that use indirect proxies for prey abundance and distribution, our study utilized 2 herring density estimates based on (1) direct observations from acoustic trawl survey data and (2) simulations from a fully coupled ecosystem model. Mixed effects models were used to infer the effect of herring density and light intensity on whale movement patterns. Our results suggest that killer whales follow NSS herring over long distances along the coast from their inshore overwintering areas to offshore spawning grounds. All whales changed from fast, directed, to slow, non-directed movement when herring density increased, although individuals had different propensities towards movement. Our data indicated that whales continue to feed on herring along the Norwegian shelf. We conclude that NSS herring constitute an important prey resource for at least some killer whales in the northeastern Atlantic, not only during the herring overwintering period, but also subsequently throughout the herring spawning migration.
Chinese bank managers’ perceptions of barriers to the implementation of green credit in corporate loan decision-making

ABSTRACT This paper clarifies the difficulties associated with green credit implementation by investigating 240 Chinese bank managers. We identify nine industry and organisational barriers. Our results provide evidence that different perceptions exist among managers of Chinese banks with different ownership structures and market shares. Due to their size, rural commercial banks suffer from higher organisational barriers than joint-stock commercial banks or state-controlled commercial banks. The training of employees and implementation costs of green credit also explain differences among Chinese bank managers’ perceptions. The findings provide important insight into promoting green credit implementation, particularly in identifying the challenges banks currently face according to their different ownership structures.
HPTLC Profile of Phenolic Compounds Presents in Extracts Obtained from Different Varieties of White and Red Grape Pomace

Grape pomace is used in different areas in the food and food supplement, cosmetic, pharmaceutic industries, and for compost or animal food. The chemical composition is different between white and red grapes varieties, depending also on the sort of wine obtained. Grape pomace contains various chemical compounds from the following classes: phenolics, proteins, minerals, lipids. Our goal was to show the HPTLC fingerprint for quality evaluation and total phenol content for the quantitative evaluation of extracts obtained from 4 varieties of grape pomace (Feteasca regala, Riesling, Burgund, Cabernet Sauvignon). The extracts were obtained by UAE and MAE. The HPTLC fingerprints of the extract shown that there are 4 compounds present in all samples: rutin, hyperoside and, chlorogenic and caffeic acids. In all samples was observed the presence of resveratrol. Total phenol content expressed as gallic (GAE) acid equivalents per 100ml extract were between 4.75% and 13.08%.
Adsorption mechanism on metal organic frameworks of Cu-BTC, Fe-BTC and ZIF-8 for CO2 capture investigated by X-ray absorption fine structure

Three different commercial metal–organic frameworks (MOFs) of Cu-BTC, Fe-BTC and ZIF-8 have been characterized by multiple techniques including CO2 adsorption/desorption, scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray absorption fine structure (XAFS). Particularly, the MOFs powders were sealed inside quartz sample tubes for each step of CO2 adsorption/desorption, and were sequentially measured for XAFS to identify the short-range structural evolutions on investigated metals (Cu, Fe, Zn). According to the data analyses on X-ray absorption near edge spectroscope (XANES) and extended X-ray absorption fine structure (EXAFS), we can demonstrate that both electronic and local structures of MOFs were almost unchanged between fresh samples and those under the activated/adsorbed/desorbed conditions. This indicates that the CO2 adsorption of MOFs is mainly governed by the physical driving force. On the other hand, the chemical transformation, i.e. elimination of water in MOFs structure by the activation (13.3 kPa, 473 K, 12 h), was found for Cu-BTC only.
MooFuzz: Many-Objective Optimization Seed Schedule for Fuzzer

Coverage-based Greybox Fuzzing (CGF) is a practical and effective solution for finding bugs and vulnerabilities in software. A key challenge of CGF is how to select conducive seeds and allocate accurate energy. To address this problem, we propose a novel many-objective optimization solution, MooFuzz, which can identify different states of the seed pool and continuously gather different information about seeds to guide seed schedule and energy allocation. First, MooFuzz conducts risk marking in dangerous positions of the source code. Second, it can automatically update the collected information, including the path risk, the path frequency, and the mutation information. Next, MooFuzz classifies seed pool into three states and adopts different objectives to select seeds. Finally, we design an energy recovery mechanism to monitor energy usage in the fuzzing process and reduce energy consumption. We implement our fuzzing framework and evaluate it on seven real-world programs. The experimental results show that MooFuzz outperforms other state-of-the-art fuzzers, including AFL, AFLFast, FairFuzz, and PerfFuzz, in terms of path discovery and bug detection.
Dynamics of Polymeric Liquids

Vol 1: Fluid Mechanics pp xv + 470 price £22 Vol 2: Kinetic Theory pp xiii + 471–727 price £20 R Byron Bird, Robert C Armstrong and Ole Hassager Chichester: J Wiley 1977 These two volumes set out in a very satisfactory and timely manner a comprehensive account of polymer fluid dynamics. The subject has undergone a rapid development in recent years due to the availability of continuum and molecular theories and intensive experimental activity.