bluuebunny/crossref_metadata_2025_split huggingface dataset:
Fluid Structure Interaction Analyses of Elevated Storage Tank under Seismic Load
Authors: Erdem Tuğrul , Gücüyen Engin 
Published: May 2024

Elevated storage tanks are used to store fresh and waste water, cereal, oil and petrochemical materials. Therefore they serve in a wide area of utilization in this day and age. Analysis of a half full with water elevated storage tank is performed in the scope of this study. The structure is composed of a steel circular storage tank and frame typed steel stager. The structure is under the effect of earthquake loads as well as operational ones. Numerical model is generated by Finite Elements Analysis (FEA) software including fluid and structure parts. The interaction of the parts is provided by Coupled Eulerian Lagrangian (CEL) technique. While the structure constitutes the Lagrangian part, the fluid constitutes the Eulerian part. Interaction of Eulerian and Lagrangian parts are provided by general contact algorithms. Free surface movement of the water, maximum displacements and natural frequency values with related mode shapes of the structure are obtained after numerical analysis. Numerical results are verified by semi-analytical model, where the structure is modelled as single degree of freedom system. The accordance between results is numerically and visually obtained. The turbulent movement of water under the influence of an earthquake is modelled by utilizing the CEL technique. So, the effect of the dynamic pressure induced by the turbulence on the tank and the structural system has been taken into consideration.
High School Aetas’ Course Experience: Benchmark for Streamlining Curricular Program Management
Authors: Payad Arlan 
Published: May 2024

Many of the Aeta students in the province are included in mainstream classrooms. As this causes the Indigenous some difficulty coping, the study analyzed four high schools regarding the course experience of 162 of their Aeta students. The researcher used a survey that he, through referenced studies, localized and translated—”Survey on Aetas’ High School Course Experience.” The survey yielded the most pronounced needs of Aetas—starting lessons with Aetas’ prior knowledge, school-based Indigenous centers, indigenized learning content, and more understandable media of instruction. The study used quantitative and descriptive, using a questionnaire to quantify the Aetas’ assessment of their high school experience with non-Indigenous classmates, teachers, and administrators. The study’s resulting discussion and conclusion suggested improvements through particularized versions of programs that could center on Inclusiveness Training for the teachers; school-based Indigenous Centers; the inclusion of indigenous knowledge in lessons; implementation and consistent management of school services and events that reflect inclusive on-campus services; generation of livelihood programs and on-the-job trainings that are mindful of the job-readiness of the Aetas; content training that is coupled with motivational counseling; the integration of technology that democratizes the access to information for all, with no exclusion against the non-mainstream.
Vaginal or Fecal Contamination Which Contributes to Parasite Existence in Urine Sediment
Authors: Siagian Forman Erwin 
Published: May 2024

Aims: intended to deepen our knowledge to date regarding parasites that might found in urine sediment as consequences of vaginal or fecal contamination during voiding
Discussion: Urine in the bladder is a sterile waste product composed of water soluble nitrogen products. But during voiding, the passage of the urine through lower/outer portion of the urinary tract might come across normal microbiota which function in maintaining the urothelial integrity and preventing urinary tract infection (UTI), as well as promoting local immune function. Parasites and parasitic ova may be seen in urinary sediments as a result of fecal or vaginal contamination. Identification of parasites in centrifuged deposits of urine sediment is a relatively rare occurrence in clinical practice but still must be considered carefully, whether as a consequence of contamination or definite causes of infection. Two of the common parasite found in urine sediment are Trichomonas vaginalis and Enterobius vermicularis. Urine collection procedure must be explained briefly to the patient along with appropriate informed consent prior obtaining the sample.
Conclusion: The possibility of parasites being found in urine sediment remain to happen. An in-depth analysis needs to be carried out to determine whether this occurs due to vaginal or rectal contamination or whether it is due to a definitive infection occurring in the urinary tract.
Exploration of Teachers Perception on their Roles in Career Guidance among Secondary Schools Students Career Choices
Authors: Bello Ashiru , Abdallah Syed Muhamad Syed 
Published: May 2024

Aims: The study aim to explore the perceptions of teachers on their roles as career guidance providers on the challenges and opportunities associated with guiding students towards career pathways
Study Design: Using qualitative methodology, Participants of this study were carefully chosen as experienced career guidance masters from the selected schools in Katsina State. The data was gathered through semi-structured interview and which is guided by a validated interview protocol linked with the research objective.
Place and Duration of Study: Secondary schools of Katsina State Nigeria between December 2023 and April 2024.
Methodology: We included 10 teachers (5 men, 5 women; age range 25-55 years) with teaching experience. The data collected was carefully analysed using ATLAS.ti 23 software to draw the schematic diagrams leading to discuss each theme and category based on existing literature.
Results: From the findings, two main themes emerged from the analyses; “effectiveness of career guidance program and teachers' engagement”. From each of the two themes, three categories emerged with various quotations from the participants. These quotations were used to inform the development of more responsive and impactful career guidance initiatives within various educational institutions in Katsina state and beyond.
Conclusion: Ultimately, this study contributes to the on-going discourse on policy and the development of career guidance in schools as a realm of career development that fosters a more inclusive approach to student guidance and successful future professional. However, further research may be necessary, particularly in other geographical areas.
Assess Nurse's Knowledge toward Venous Thrombosis at Al-sharqat General Hospital
Authors: Mohammed Ismail Younes , Kumait Abid Salih 
Published: May 2024

Background and Aims: A blood clot that is stuck in a deep vein is known as deep vein thrombosis, while a blood clot that has broken loose and migrated to the lungs is known as a pulmonary embolus. Thrombotic disorders are the world's most common cause of high mortality and morbidity among preventable diseases was to assess nurse's knowledge toward venous thrombosis at AL-Sharqat General Hospital and relationship between knowledge and their demographic data.
Study Design: A descriptive study.
Place and Duration of Study: Sample: This study was conducted at Al-Sharqat General Hospital in critical care unit and surgical department, between November 2023 and May 2024.
Methodology: A purposive sample (non-probability) consisting of (25) nurses was selected from nurses who work in the critical care units and surgical department.
Results: The results showed that over half of the participants were female nurses, making up the majority of the group. These nurses had graduated from nursing institutes and had between one and five years of experience, without having attended any training courses. Results show that nurses knowledge related to venous thrombosis was poor to moderate and there were no significant relationship between nurse's knowledge and their demographic data at P-value >0.05.
Conclusion: Nurses working in the surgical department, emergency units, and critical care units had poor knowledge regarding venous thrombosis because their education level was low and they had not attended training courses.
Low‐Temperature Growth of SnO2 Nanorod Arrays and Tunable n–p–n Sensing Response of a ZnO/SnO2 Heterojunction for Exclusive Hydrogen Sensors
Authors: Huang Hui , Gong Hua , Chow Chee Lap , Guo Jun , White Timothy John , Tse Man Siu , Tan Ooi Kiang 
Published: May 2011

AbstractUniform SnO2 nanorod arrays have been deposited at low temperature by plasma‐enhanced chemical vapor deposition (PECVD). ZnO surface modification is used to improve the selectivity of the SnO2 nanorod sensor to H2 gas. The ZnO‐modified SnO2 nanorod sensor shows a normal n‐type response to 100 ppm CO, NH3, and CH4 reducing gas whereas it exhibits concentration‐dependent n–p–n transitions for its sensing response to H2 gas. This abnormal sensing behavior can be explained by the formation of n‐ZnO/p‐Zn‐O‐Sn/n‐SnO2 heterojunction structures. The gas sensors can be used in highly selective H2 sensing and this study also opens up a general approach for tailoring the selectivity of gas sensors by surface modification.
Water‐Soluble Poly(N‐isopropylacrylamide)–Graphene Sheets Synthesized via Click Chemistry for Drug Delivery
Authors: Pan Yongzheng , Bao Hongqian , Sahoo Nanda Gopal , Wu Tongfei , Li Lin 
Published: May 2011

AbstractCovalently functionalized graphene sheets are prepared by grafting a well‐defined thermo‐responsive poly(N‐isopropylacrylamide) (PNIPAM) via click chemistry. The PNIPAM‐grafted graphene sheets (PNIPAM‐GS) consist of about 50% polymer, which endows the sheets with a good solubility and stability in physiological solutions. The PNIPAM‐GS exhibits a hydrophilic to hydrophobic phase transition at 33 °C, which is relatively lower than that of a PNIPAM homopolymer because of the interaction between graphene sheets and grafted PNIPAM. Moreover, through π–π stacking and hydrophobic interaction between PNIPAM‐GS and an aromatic drug, the PNIPAM‐GS is able to load a water‐insoluble anticancer drug, camptothecin (CPT), with a superior loading capacity of 15.6 wt‐% (0.185 g CPT per g PNIPAM‐GS). The in vitro drug release behavior of the PNIPAM‐GS‐CPT complex is examined both in water and PBS at 37 °C. More importantly, the PNIPAM‐GS does not exhibit a practical toxicity and the PNIPAM‐GS‐CPT complex shows a high potency of killing cancer cells in vitro. The PNIPAM‐GS is demonstrated to be an effective vehicle for anticancer drug delivery.
Two‐ and Three‐Terminal Resistive Switches: Nanometer‐Scale Memristors and Memistors
Authors: Xia Qiangfei , Pickett Matthew D. , Yang J. Joshua , Li Xuema , Wu Wei , Medeiros‐Ribeiro Gilberto , Williams R. Stanley 
Published: May 2011

AbstractThe logical relationship between two previously defined “memory resistors” is revealed by constructing and experimentally demonstrating a three‐terminal memistor equivalent circuit using two two‐terminal memristors. A technique is then presented, using nanoimprint lithography in combination with angle evaporation, to fabricate a single nanoscale device with a footprint of 4F2, where F is the minimum lithographic feature size, that can be operated as either a two‐terminal lateral memristor or a three‐terminal memistor inside a crossbar structure. These devices exhibit repeatable bipolar nonvolatile switching behavior with up to 103 ON/OFF conductance ratios, as well as the desired three‐terminal behavior.
The influence of alkali and alkaline earth metal compounds on pyrolysis of peanut shell
Authors: Wang Xianhua , Chen Hanping , Yang Haiping , Wang Jing , Xin Fen 
Published: May 2011

ABSTRACTThis article aims at studying the influence of alkali and alkaline earth species on the pyrolytic performances of peanut shell. The biomass sample was washed with 5 wt% acids (H2SO4 and HCl) and deionized water, respectively. The concentrations of metallic elements in the original and washed peanut shells were determined with inductively coupled plasma‐atomic emission spectrometry. The pyrolysis experiment was performed on a thermogravimetric analyzer (TGA) at a heating rate of 10 °C/min and N2 flow rate of 100 mL/min. It can be observed that the derivative thermogravimetric (DTG) curves of demineralized peanut shell were obviously shifted to higher temperature and the char yields increased greatly. With the addition of 1 wt% or 10 wt% K2CO3 or dolomite to the original and acid‐washed biomass samples, the DTG curves of the original peanut shell were shifted to low temperature and this effect was more distinct for the acid‐washed peanut shell. K2CO3 displayed much greater effect than dolomite on the alteration of the pyrolysis behavior. The first‐order kinetic analysis showed that the activation energy increased greatly with demineralization. © 2011 Curtin University of Technology and John Wiley & Sons, Ltd.
A modified quasi‐creep model for assessment of deformation of topas COC substrates in the thermal bonding of microfluidic devices: Experiments and modeling
Authors: Wang Zhi Y. , Yue Chee Y. , Lam Yee C. , Roy Sunanda , Jena Rajeeb K. 
Published: May 2011

AbstractThe effects of thermomechanical properties of dissimilar polymer plates on thermal bonding were investigated and the resultant deformation of cover Topas COC plate was modeled using a simplified quasi‐creep model. The appropriate conditions for thermal bonding for minimal deformation of both the Topas cover and substrate plates could be established through simulation using the quasi‐creep model. Both the cover plate and the substrate containing microchannels were fabricated by injection molding. The elastic modulus of the COC plate at different temperatures was measured using three‐point bending test. The thermal bonding was conducted at different temperatures, pressures, and holding times. The deformation of the cover plate (consisting of Topas with a lower glass transition temperature, Tg) into the microchannel of the substrate plate (consisting of Topas with a higher Tg) was found to be significant even at lower bonding pressures when the bonding temperature was higher than a critical temperature. Such deformation was dependent on the viscoelastic creep behavior of the material and the thermal bonding temperature and load. This deformation behavior was predicted by the numerical model, and the predicted results agree well with the experimental data. The bonding strength of the sealed microchannels was evaluated using the burst test. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Synthesis and characterization of a novel graft copolymer containing carboxyl groups and its application to extract uranium(VI) from aqueous media
Authors: Anirudhan Thayyath S. , Tharun Abdul R. , Rijith Sreenivasan , Suchithra Padmajan S. 
Published: May 2011

AbstractA novel poly(methacrylic acid)‐grafted‐cellulose/bentonite (Cellu‐g‐PMAAc/Bent) superabsorbent composite was prepared through graft copolymerization reaction among cellulose, methacrylic acid, and bentonite in the presence of N,N′‐methylenebisacrylamide as a crosslinker and potassium peroxydisulphate as an initiator. The structural and morphological characteristics of the graft copolymer were determined using Fourier transform infrared spectra, scanning electron microscope‐energy dispersion analysis, and X‐ray diffraction. The effectiveness of the Cellu‐g‐PMAAc/Bent, as adsorbent for the removal and recovery of uranium(VI) from aqueous media, was studied. The effects of pH, contact time, and initial sorbate concentration were studied to optimize the conditions for maximum adsorption. The adsorption process, which was pH dependent, shows maximum removal (>99.0%) at pH 6.0. Kinetic study showed that 180 min of contact at 100 mg/L could adsorb about 99.2% of U(VI) onto Cellu‐g‐PMAAc/Bent. A pseudosecond‐order kinetic model successfully described the kinetics of sorption of U(VI). Adsorption equilibrium data were correlated with the Langmuir, Freundlich, and Redlich–Peterson isotherm models. The best fit was obtained with Freundlich model. Desorption of U(UI) was studied by using 0.1M HCl. Adsorption/desorption for more than six cycles showed the possibility of repeated use of this graft copolymer for the recovery of U(VI) from aqueous solutions. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Encapsulation of curcumin by methoxy poly(ethylene glycol‐b‐aromatic anhydride) micelles
Authors: Hong Ding‐Wei , Liu Tsang‐Hao , Chu I‐Ming 
Published: May 2011

AbstractSuitable carrier systems for sustained release of curcumin were studied by using the self‐assembled polymeric micelles. Poly(ethylene glycol) methyl ether and poly(aromatic anhydride) were used as the hydrophilic and hydrophobic blocks, respectively, in forming amphiphilic diblock copolymers. Four different types of polymers methoxy poly(ethylene glycol‐ b‐1,3‐bis(p‐carboxyphenoxy)propane) (mPEG5000CPP, mPEG2000CPP), methoxy poly(ethylene glycol‐b‐1,6‐bis(p‐carboxyphenoxy)hexane) (mPEG5000CPH, mPEG2000CPH) were synthesized via melt condensation approach. Micelles were formed at very low polymer concentration with stable hydrophobic cores. The particle sizes of micelles remained stable during degradation period. All four different polymeric micelles showed low cytotoxicity toward human fibroblasts cells and can kill cancer cells in very low concentrations. High loading efficiency and drug content were observed in curcumin‐loaded micelles. Curcumin showed mild initial burst (30% of drug loading in the first 24 h) when released from the micelles and its release was sustained for at least 18 days. These micelles, especially those of mPEG5000CPP, show potential to serve as the delivery vehicles for sustained release of curcumin. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011.
Electro‐active oligomers containing pendent carbazolyl or indolyl groups as host materials for OLEDs
Authors: Zostautiene R. , Mazetyte D. , Grazulevicius J. V. , Lai Y. M. , Wang W. B. , Jou J. H. , Grigalevicius S. 
Published: May 2011

AbstractOligoethers containing electroactive carbazolyl, indolyl or 2‐phenylindolyl fragments were synthesized and characterized by NMR spectroscopy, elemental analysis and gel permeation chromatography. The oligomers represent amorphous materials of high thermal stability with glass transition temperatures of 107–161°C. The electron photoemission spectra of layers of the synthesized oligomers showed ionization potentials of 5.9–5.95 eV. Some of the derivatives were tested as host materials in phosphorescent OLEDs with iridium(III) [bis(4,6‐difluorophenyl)‐pyridinato‐N,C2′]picolinate as the guest. The device based on oligomer containing carbazolyl fragments exhibited the best overall performance with a turn‐on voltage of 3.5 V, maximum power efficiency of 4.1 lm/W and maximum brightness of 937 cd/m2. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Optimization of electrospun polylactide‐based ultrathin fibers for osteoconductive bone scaffolds
Authors: Torres‐Giner Sergio , Gimeno‐Alcañiz Jose V. , Ocio Maria J. , Lagaron Jose M. 
Published: May 2011

AbstractBone tissue interfacial scaffolds, which encourage cell growth, are critical determinants for clinical success after implant surgery. Over the years, a number of resorbable configurations have emerged for bone cell support and growth, but only a few have demonstrated clinical efficacy. Polymer coatings produced by electrospinning are regarded as very promising bone interfaces because of the ultrathin‐scaled dimensions of its physical structure. In this study, the morphology, composition, thermal properties, and cell growth viability of a number of polylactide‐based systems containing different binary and ternary formulations of this biomaterial with collagen and commercial hydroxyapatite nanoparticles were characterized. The best performance in terms of biocompatibility was obtained for the tricomponent system in which the submicron fibers were further subjected to uniaxial orientation process during formation. The in vitro proliferation of the cells, which harbored on these ultrathin‐structured mats, was examined by means of a metabolic activity indicator and ensured by means of scanning electron microscopy, and cell anchorage was checked by fluorescent optical microscopy. Finally, the optimum tricomponent material was successfully sterilized for the first time by gamma radiation without noticeable losses in cell‐seeding capacity. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Spectroscopic studies and evaluation of thermorheological properties of softwood and hardwood lignin
Authors: Awal Abdul , Sain Mohini 
Published: May 2011

AbstractFourier transform infrared spectroscopy (FTIR) was used to determine characteristic absorption peaks of softwood kraft lignin and soda hardwood lignin. Remarkable spectral differences were noticed between the different lignins due to their various chemical structures. Proton nuclear magnetic resonance spectrometry (1H NMR) was employed to analyze the structure of lignin. Matrix‐assisted laser desorption/ionization time‐of‐flight mass spectrometry (MALDI‐TOF) provided important data regarding the molecular weight distribution of lignin. Thermal stability of softwood lignin was found to be remarkably higher than that of hardwood lignin. Softening temperature and glass transition temperature of lignin were measured by differential scanning calorimetry (DSC) which was useful in selecting an optimal temperature profile during extrusion process. Rheological studies provided valuable information about the viscosity of lignins. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011
Types of interaction of meso‐tetraphenylporphyrin with alkali and alkaline‐earth metal ions
Authors: Chaudhuri Tandrima , Banerjee Manas , Ghosh Ayan , Pan Animesh , Ganguly Neogi Soumya 
Published: May 2011

ABSTRACTThe cavity in a porphyrin can accommodate metal ions through electron donor–acceptor (EDA) interaction in acetonitrile media without any specially designed fabrication with the porphyrin subunit. Alkali metal ion forms a complex with meso‐tetraphenylporphyrin (TP) in 2:1 stoichiometry, while the bivalent Mg2+ ion follows a 1:1 stoichiometry. A fluorescence interaction study indicated that TP can behave like a chemosensor for these ions present in the blood electrolytes. Specifically, for the alkali metal ions intensity‐based sensing was observed, due to inhibition of photoinduced electron transfer (PET), entailing enhancement of fluorescence intensity, and for the alkaline‐earth Mg2+ a mixed quenching was observed. Na+ and K+ ions can be differentiated depending upon the extent of fluorescence enhancement. Copyright © 2011 John Wiley & Sons, Ltd.