Miracle-dz/UniFAR-FTUs huggingface dataset:
Thiophene-Phenylene and Thiophene-Thiazole Oligomeric Semiconductors with High Field-Effect Transistor On/Off Ratios

A series of thiophene-containing oligomers that are less electron rich than alpha-6T were synthesized, and the thin film morphologies and field-effect transistor characteristics of the oligomers were evaluated. Phenyl and thiazole rings were included in many of the oligomers, and a new synthesis of perfluoroalkylmethyl-terminated oligomers was developed. Desirably low off currents were associated with calculated highest occupied molecular orbital energies above ca. 5.0 eV relative to vacuum. Some of the oligomers displayed mobilities above 0.01 cm2 (Vs)-1, but there was no correlation of mobility with calculated orbital energies and some compounds with seemingly continuous morphologies had low mobilities nonetheless. One compound, 1,4-bis(5‘-hexyl-2,2‘-bithiophen-5-yl)benzene, showed promising behavior as a solution-deposited semiconductor, with mobility up to 0.02 cm2 (Vs)-1 and an on/off ratio up to 20 000.
Correlation analysis between forced oscillation modes caused by wind power

With the increase of the grid-connected capacity of wind power, the influence of power system forced oscillation caused by wind power is becoming bigger and bigger, so it is necessary to understand its production mechanism and general characteristics. In this paper, the nonlinear and non-stationary signal generated by the unstable wind speed is analyzed to speculate the characteristics of wind-induced oscillation. Secondly, the bispectrum analysis and the bicoherence analysis are introduced. The obtained bispectrum and bicoherence coefficients are used to analyze the oscillation caused by wind power and the quadratic phase coupling relationship between oscillation modes. Finally, the simulation is operated considering small wind farm connected to a 4-generator-2-area (4G2A) system. The simulation results verify the correctness of the proposed speculation and the effectiveness of the proposed method.
Prevalence, Distribution, and Antibiotic Susceptibilities of Nosocomial Infections at a Tertiary Hospital in Port Harcourt, Nigeria

Background: Previously, many infections could be treated effectively based on the clinician’s past clinical experience. The development of resistance to essentially all of the antimicrobial agents currently in use in clinical practice has made this scenario more of the exception than the norm. Selecting an appropriate antimicrobial agent has become increasingly more challenging; the clinician has to navigate through the variety of available agents in the face of increasing antimicrobial resistance. The diagnostic laboratory now plays very important role in clinical practice. To ensure safe and effective empirical treatment, a surveillance study of the susceptibility pattern of common pathogens and appropriate use of antibiotics is imperative. Objective: We report on the prevalence, distribution, and antibiotic susceptibility patterns of nosocomial pathogens isolated at the University of Port Harcourt Teaching Hospital (UPTH) and the effectiveness of the antibiotics commonly prescribed at the hospital in treating these infections. Methods: A retrospective cross-sectional study of specimens received at the microbiology laboratory was conducted over a 6-month period, from October 2015 to March 2016, using urine, blood, and semen specimens. In total, 5,160 samples received and analyzed at the laboratory within the study period were assessed. Results: Of the 5,160 specimens analyzed, 881(17.07%) were positive for bacteria: 691(78.43%) from urine, 86 (9.76%) from blood, and 104 (11. 81%) from semen. Escherichia coli (35.74%), Klebsiella pneumoniae (52.33%), and Staphylococcus aureus (65.4%) were the most frequently isolated pathogens from urine, blood, and semen, respectively. Widespread multidrug resistance was observed among the organisms. Klebsiella pneumoniae, S. aureus, and E. coli isolated from urine were resistant to amoxicillin/clavulanate, cefuroxime, ceftazidime, ciprofloxacin, ampicillin, gentamycin, and ceftriaxone. A review of the pattern of prescribing antibiotics revealed that in the emergency unit, ceftriaxone (34.09%) and metronidazole (30.09%) were most frequently prescribed, whereas in the general outpatient department, metronidazole (19.09%), amoxicillin (16.61%), amoxicillin/clavulanate (9.39%), and ofloxacin (9.39%) were often prescribed. S. aureus was susceptible to only ceftriaxone, whereas K. pneumoniae and E. coli were susceptible only to ofloxacin. Conclusions: Most of the isolated pathogens were not susceptible to the frequently prescribed antibiotics. Empirical prescribing of antibiotics without current epidemiological data of pathogens in the hospital can only further exacerbate the problem of antimicrobial resistance. The need for periodic epidemiological surveillance and rational use of antibiotics anchored on a good antibiotic stewardship program is therefore strongly recommended. Funding: None Disclosures: None
DETERMINASI MINAT BELI ONLINE SHOPEE

Pra riset ini dilakukan bertujuan untuk membangun hipotesis penelitian dengan menggunakan motode deskriptif. Untuk mengetahui variabel yang memepengaruhi Minat Beli Online, maka dilakukan review penelitian terdahulu. Hasil pra riset menunjukkan bahwa diduga e-WOM, Persepsi Risiko, Citra Merek, Kepercayaan memiliki hubungan baik secara langsung maupun tidak langsung terhadap Minat Beli Online.
Growth of GaInAsP using ethyldimethylindium and tertiarybutylphosphine

The growth of GaInAsP lattice matched to GaAs by organometallic vapor phase epitaxy using ethyldimethylindium and tertiarybutylphosphine is reported for the first time. The composition of the films is approximately Ga0.87In0. 13As0.75P0. 25, giving a band gap of about 1.52 eV. Intrinsic films are n type. Both n‐ and p‐type doped layers have been prepared. Photoluminescence measurements on intrinsic films give spectral half widths of about 70 meV. Capping the films with AlGaAs window layers and using n+‐n, high‐low junctions at the GaInAsP/GaAs interface greatly improve the photoluminescent properties. A minority‐carrier lifetime of 35 ns in an intrinsic film has been measured and suggests that the quaternary is equivalent to AlGaAs with the same band gap.
Economic Assessment of Itaconic Acid Production from Aspergillus Terreus using Superpro Designer

Itaconic acid is a metabolite produced from biotechnological pathway using the microorganism Aspergillus terreus. It is used in a wide number of sectors such as industry, agriculture and health. Based on its chemical properties, itaconic acid is a great interest for replacing polymers and resins derived from petroleum. However, its production is still expensive and this latter hinders large scale studies regarding itaconic acid production. Nowadays, simulation is a great alternative to overcome this problem. It allows researchers to make a more effective evaluation and self-assessment, reducing costs and avoiding losses at large scale operation. For that reason, the purpose of this research is performing an Itaconic acid production simulation on industrial scale using SuperPro Designer software. Costs reduction improvement is also analyzed. 90g/L of glycerol, 1g/L of NH4NO3 and 1.25 of KH2PO4 are set up on simulation as media composition reported from references. Results regarding itaconic acid crystals showed a productivity of 171 kg/h and an operating cost closed to 42.0 USD/kg. Interestingly, a 17 % productivity increase is reached by proposing a stream recycling based on itaconic acid recovering from downstream centrifugation processing. The latter based on a higher productivity estimated (200 kg/h). Also average costs are reduced at 12 % since 38.1 USD/kg is found using improvements mentioned. Results found here demonstrate the potential usage of simulators for estimating costs and production which allows predicting the bioprocess feasibility.
Growing Prevalence and Incidence of Diabetes in Republic of Macedonia in the Past 5 Years Based on Data from the National System for Electronic Health Records

Introduction. Diabetes is a chronic metabolic disease characterized with a rapid progression of prevalence in last 3 decades, especially in countries with low and middle income. Next three decades this number of diabetes in the world is expected to be doubled. Early diagnosis and appropriate management of diabetes is the primary way to prevent and delay cardiovascular complications. Patients and methods. In this retrospective study, we used the data from National electronic system e-health which was performed in late 2014, wich gives us nearly precise data, and we made statistical analysis for diabetes in last 5 years (2015-2019). Results. In 2015 we have registered 103480 patients with DM, in 2016 108130 patients, in 2017 114408, in 2018 119999 and in 2019 124450 patients with DM. 95% of patients are with T2DM and 4, 1% with T1DM. According the data from State statistical office for population of Republic of Macedonia, the prevalence of T2DM for the years 2015-2019 is as follows: 5,66% in 2015, 6.13% In 2016, 6.55% I 2017, 7,06% in 2018 and 7,2% in 2019. Conclusions. The number of registered patients with diabetes in last 5 years has grown up for 20970 or 20%, in the last 5 years the number of patients with type 2 diabetes has grown up for 18272 patients or 11%. The prevalence of T2DM has increased for 1.54%. Involvement of primary health care professionals has improved the early diagnosis of type 2 diabetes.
A supervised‐learning‐based spatial performance prediction framework for heterogeneous communication networks

In this paper, we propose a supervised‐learning‐based spatial performance prediction (SLPP) framework for next‐generation heterogeneous communication networks (HCNs). Adaptive asset placement, dynamic resource allocation, and load balancing are critical network functions in an HCN to ensure seamless network management and enhance service quality. Although many existing systems use measurement data to react to network performance changes, it is highly beneficial to perform accurate performance prediction for different systems to support various network functions. Recent advancements in complex statistical algorithms and computational efficiency have made machine‐learning ubiquitous for accurate data‐based prediction. A robust network performance prediction framework for optimizing performance and resource utilization through a linear discriminant analysis‐based prediction approach has been proposed in this paper. Comparison results with different machine‐learning techniques on real‐world data demonstrate that SLPP provides superior accuracy and computational efficiency for both stationary and mobile user conditions.
Energy-Efficient Deployment and Adaptive Sleeping in Heterogeneous Cellular Networks

This paper focuses on energy efficiency that is a key performance metric in heterogeneous cellular networks to two key areas. First, based on the Poisson point process distributions of small-cell base stations (SBSs) and macrocell base stations (MBSs), the energy-efficiency model is formulated, and the effect of base stations’ distribution on energy efficiency is analyzed. For maximizing energy efficiency, the joint optimal densities of SBSs and MBSs are deduced under the constraint of quality of service. Second, according to this, we propose a joint sleep strategy of MBSs and that of SBSs. We deduce the optimal threshold of traffic load according to the joint optimal densities. If the traffic load of SBSs (or MBSs) is less than the optimal threshold of traffic load, these SBSs (or MBSs) go to sleep; otherwise, it is activated. This makes the SBSs and MBSs adaptively and distributively sleep according to their own traffic loads. The simulation results verify that the deduced joint optimal densities of the SBS and the MBS are accurate, and energy efficiency is improved when SBSs and MBSs adaptively sleep.
Varifocal Occlusion for Optical See-Through Head-Mounted Displays using a Slide Occlusion Mask

We propose a varifocal occlusion technique for optical see-through head-mounted displays (OST-HMDs). Occlusion in OST-HMDs is a powerful visual cue that enables depth perception in augmented reality (AR). Without occlusion, virtual objects rendered by an OST-HMD appear semi-transparent and less realistic. A common occlusion technique is to use spatial light modulators (SLMs) to block incoming light rays at each pixel on the SLM selectively. However, most of the existing methods create an occlusion mask only at a single, fixed depth—typically at infinity. With recent advances in varifocal OST-HMDs, such traditional fixed-focus occlusion causes a mismatch in depth between the occlusion mask plane and the virtual object to be occluded, leading to an uncomfortable user experience with blurred occlusion masks. In this paper, we thus propose an OST-HMD system with varifocal occlusion capability: we physically slide a transmissive liquid crystal display (LCD) to optically shift the occlusion plane along the optical path so that the mask appears sharp and aligns to a virtual image at a given depth. Our solution has several benefits over existing varifocal occlusion methods: it is computationally less demanding and, more importantly, it is optically consistent, i.e., when a user loses focus on the corresponding virtual image, the mask again gets blurred consistently as the virtual image does. In the experiment, we build a proof-of-concept varifocal occlusion system implemented with a custom retinal projection display and demonstrate that the system can shift the occlusion plane to depths ranging from 25 cm to infinity.
Bees provide pollination service to Campsis radicans (Bignoniaceae), a primarily ornithophilous trumpet flowering vine

Pollination syndromes refer to stereotyped floral characteristics (flower colour, shape, etc.) that are associated with a functional group of pollinators (bee, bird, etc.). The trumpet creeper Campsis radicans, endemic to the southeast and mid‐west United States, has been assigned to the hummingbird‐pollination syndrome, due mainly to its red, trumpet‐shaped flowers. Previous studies demonstrated that the ruby‐throated hummingbird Archilochus colubris is C. radicans' primary pollinator, but anecdotal data suggest various bee species may provide pollination service when hummingbirds are absent. This study characterised C. radicans nectar volume and concentration by time of day. Nectar volume was suitable for hummingbirds, but concentration was higher than typical hummingbird‐pollinated plants (∼20% w/w); at ∼30% w/w, it approached the concentration expected in bee‐pollinated plants (∼50% w/w). We also found substantial amounts of nectar at night. Two C. radicans populations received virtually no hummingbird visits, but the number of bees were markedly higher than in the populations previously described. Interestingly, there were no night‐time visitors despite the large quantity of nocturnal nectar. Based on previously published pollen delivery per visit by various species, this study estimated that cumulative deposition by bees routinely reached pollen deposition thresholds for setting fruit in C. radicans. They are, unequivocally, the predominant pollinators in these populations, thus providing pollination service in the absence of hummingbirds. These results highlight C. radicans as a food source for native bees and add to the understanding of how floral phenotypes can facilitate pollination by disparate functional groups.
Application of Chitosan for the Removal of Metals From Wastewaters by Adsorption—Mechanisms and Models Review

Chitin is the world's second most abundant naturally occurring polysaccharide. Much of this is disposed of as waste from seafood crustacean, mainly in shrimps, prawns, crabs, and lobsters, where it occurs as a significant component in the shells/exoskeletons of crustacea. Due to its widespread abundance, its chemical and physical versatility, and the problems of its disposal as a waste material, a wide range of value-added applications of chitin and chitosan is being initiated, investigated, and developed. The widely ranging value-added applications of chitin and chitosan are presented in this review. Chitin and its derivative, chitosan, both highly stable and difficult to degrade materials, can be obtained as 10–20% w/w from the waste seafood shells by suitable chemical processing. One of the significant developments in the new range of applications is the study of the ability of chitosan, as a potentially major environmental treatment material, to remove metal ions from wastewaters. Chitosan is the deacetylated form of chitin, and this process produces a chain of amino groups along the chitosan structure. Many researchers are now looking at the ability of this amino group to adsorb metal ions from industrial wastewaters and leachates. This review presents the developments in this area and identifies the defficiences in existing chitosan research by reviewing the equilibrium studies carried out to determine the capacity of chitosan for various metal ions. Then the kinetic studies are reviewed, as well as the solution methodologies adopted by various researchers to explain and model the rate of adsorption of the metal ions from solution. Both equilibrium knowledge and kinetic knowledge are required in order to design commercial treatment systems.
Evaluation of primary lateral neck mass in adults: Cross sectional study

Aim: Primary Lateral neck mass (PLNM) is a disease that expresses a pathology in neck, excluding thyroid and skin tumors. The spectrum ranges from “lumps, mass or tumors,” congenital tumors, inflammatory diseases, and benign neoplasm to malignant neoplasm. The current Skandalakis algorithm excludes thyroid pathology. Correct anamnesis and physical examination are especially important for data collection. We herein analyzed the methods of study in PLNM. Methods: This cross-sectional study was performed with review of medical records from January 2010 to July 2019. All patients with diagnoses of PLMN and older than 15 years of age were analyzed. We excluded patients with “classic” and unknown lateral neck masses. Standardized protocols for data collection were implemented to minimize or avoid bias. The statistical analysis was carried out with STATA v 14.0. Results: A total of 78 patients were studied. Age and time of evolution were the most crucial factors in presumptive diagnoses. The most frequent location was the anterior triangle in the neck (77%). Murmurs and thrills were clinically defined as vascular pathologies. Mobility on all axes without fixation to deep planes were clinically defined as Lipoma. The pathological examinations were more frequently reported as lymphomas (32), which were followed by Branchial Cleft Cysts. Ultrasound was a complementary study useful in congenital malformations to determine cystic characteristics. The presence of “B symptoms” and FNA (fine needle aspiration) are useful in primary Lymphoproliferative adenopathy. MRI (Magnetic resonance image) and Angio-MRI are useful in tumors of nervous origin (schwannomas, neurofibromas, and paragangliomas tumors). Malignant soft tissue tumors (sarcomas) need complementary studies and imaging for surgical planning. Conclusion: Differential diagnoses of the primary lateral neck masses challenge surgeons. Anamnesis and physical examination are the most crucial factors for the presumptive diagnoses. Complementary studies and imaging should be requested with selective criteria.
Efficient hydrogen production and photocatalytic reduction of nitrobenzene over a visible-light-responsive metal–organic framework photocatalyst

Efficient hydrogen production and photocatalytic reduction of nitrobenzene were achieved by using a Pt-deposited amino-functionalised Ti(IV) metal–organic framework (Pt/Ti-MOF-NH2) under visible-light irradiation. XRD and N2 adsorption measurements revealed that crystalline microporous structures were formed and maintained even after the Pt deposition. The photocatalytic activity for the visible-light-promoted hydrogen production was improved through the optimization of the deposition amount of Pt as a cocatalyst. The optimised amount of Pt was determined to be 1.5 wt%. The results of in situ ESR measurements clearly indicate that the reaction proceeds through the electron transfer from the organic linker to deposited Pt as a cocatalyst by way of titanium-oxo clusters. In addition, the Pt/Ti-MOF-NH2 photocatalyst was found to catalyse photocatalytic reduction of nitrobenzene under visible-light irradiation. It was also confirmed that the catalyst can be reused at least three times without significant loss of its catalytic activity.
Hybrid Recommendation Algorithm Based on Long-term and Short-term Interest and Matrix Factorization for Collaborative Filtering

This paper proposes a hybrid recommendation algorithm which based on user interests and matrix factorization. It solves problems such as spares data, the difference between long-term and short-term interest, overemphasis of time and ignoring user new interests. The proposed algorithm distinguished users’ interest through time window. Then it obtained the distribution of user interests. Finally, it integrated into matrix factorization to explore more new interests. The result shows that short-term interest should be recommend first. Compared with the traditional matrix factorization for collaborative filtering, forgetting curve and time window, the proposed algorithm shows superior performance on precision, recall, and F1-Score. It extracts user’s interest sets, user activity, item popularity and other related indicators, which can automatically tag users and provide more options for subsequent research on the dynamic evolution of user interests or the expansion of website functions.
Inferring Highly-dense Representations for Clustering Broadcast Media Content

We propose to employ a low-resolution representation for accurately categorizing spoken documents. Our proposed approach guarantees document clusters using a highly dense representation. Performed experiments, using a dataset from a German TV channel, demonstrate that using low-resolution concepts for representing the broadcast media content allows obtaining a relative improvement of 70.4% in terms of the Silhouette coeﬀicient compared to deep neural architectures
Systemic Lupus Erythematosus with Multiple Faces in a Girl of 11 Years

Case Report Systemic lupus erythematosus in children (childhood onset SLE/cSLE) have a great variability in disease presentation. Any organ system can be involved in cSLE leading to protean clinical manifestations. In this case report, we present a 11-year-old Bangladeshi girl who presented with inflammatory pain in multiple joints, high-grade intermittent fever, headache, high blood pressure, and generalized tonic-clonic seizures. Detailed clinical examination with laboratory and imaging studies clinched the diagnosis of SLE and the involved organs include skin, mucosa, joint, haemopoietic system, kidney, and brain. In presenting this case and reviewing the literature, we emphasize the importance of very high index of suspicion for diagnosis of cSLE for early diagnosis, treatment and meticulous monitoring.