bluuebunny/crossref_metadata_2025 huggingface dataset:
Coherence of Substance Dualism
Authors: Mousavirad Seyyed Jaaber ,   Philosophy Documentation Center
Published: November 2023

Many contemporary philosophers of mind disagree with substance dualism, saying that despite the failure of physical theories of mind, substance dualism cannot be advocated, because it faces more serious problems than physical theories, lacking compatibility with philosophical arguments and scientific evidence. Regardless of the validity of the arguments in support of substance dualism, it is demonstrated in this article that this theory is coherent, with no philosophical or scientific problems. The main arguments of opponents of substance dualism are explained and criticized in this respect. Based on this, it becomes clear that the interaction of soul and body has a reasonable philosophical explanation, the problem of the pairing of soul and body, although it may not have a scientific explanation, it has a philosophical and theological solution, the principle of the physical causal closure lacks conclusive reasons and cannot reject the existence of the soul, the existence of the soul does not contradict the theory of evolution, the dependence of the soul on the brain is compatible with its independence, and finally, the principle of simplicity does not make any problem for accepting the substance dualism.
Middle Knowledge in the Middle of the 17th Century
Authors: Andersen Claus A. ,   University of South Bohemia
Published: November 2023

The year 2021 saw the publication of Sven K. Knebel’s new book on Middle Knowledge. It is an exceedingly important research publication which deserves scholarly attention. The book contains a long introduction (consisting of various studies) and an edition of the fourth book of the Irish Jesuit theologian Luke Wadding’s incomplete work on scholastic theology. This present review article first recapitulates the origins and historical significance of the doctrine of Middle Knowledge. Then Knebel’s book as well as the career of Luke Wadding are introduced. I then discuss the place of Wadding’s work in the Jesuit discourse of ‘concordia’ and its relation to Molinism. In the subsequent sections, I investigate various doctrines defended by Wadding. These include his view of disjunctive necessity, his variant of the doctrine known as ‘connectionism’, and his use of various kinds of distinctions in theology. The study concludes with a critical assessment of Knebel’s publication. Despite all praise, I disagree with Knebel’s all too pessimistic view of the research landscape: We will soon be pondering over why Early Modern scholasticism has received so much attention in recent scholarship, rather than why it did not do so in the past.
İnönü Mağarası’nda Bulunan Geç Tunç Çağı’na Ait Damgalar Üzerine Gözlemler
Authors: EKMEN Hamza
Published: November 2023

Önasya dünyasında geçmişleri Neolitik Çağ’a kadar uzanan mühürler, Tarihöncesi ve Eskiçağ toplumlarının anlaşılması konusunda önemli bilgiler sunmaktadır. Araştırmacıların çoğu, damga şeklinde forma sahip olan erken dönem mühürlerin kişisel veya kurumsal mülkiyeti yansıtan objeler olmaktan çok, tekstil ürünlerine, hayvan derilerine, duvar sıvalarına, ekmek veya insan vücutlarına baskı yapmak amacıyla kullanılan damgalar/pintaderalar oldukları üzerinde durmaktadır. Böylesine geniş bir kullanıma sahip olan damgaların ve mühürlerin baskı yüzeylerine işlenen betimler/motifler ait oldukları dönemin ve toplumun ekonomik, kültürel, dini ve majik birçok yönünü doğrudan veya sembolik bir şekilde anlatan/günümüze aktaran veri kaynaklarını oluşturmaktadır. İnönü Mağarası’nda bulunan ve bu çalışma kapsamında incelenen Geç Tunç Çağı’na ait iki adet damga, biçimsel özellikleri bakımından M.Ö. 2. Bin yıl damga mühürleriyle yakın özellikler göstermektedir. Sağlam olarak ele geçen damganın baskı yüzeyindeki motifin Anadolu’da Erken Tunç Çağı’ndan itibaren yaygın olarak görülen “güneş kültü” sembolü ile ilişkili olabileceği düşünülmektedir.
Silver Diamine Fluoride for treatment of caries in the primary dentition
Authors: Leith Rona , Olegário Isabel
Published: November 2023

Silver diamine fluoride (SDF) is an increasingly popular and highly effective technique for caries arrest in the primary dentition. Aside from being highly effective, SDF has a number of other advantages; it is quick and easy to apply with no caries removal required in advance, and as it required little cooperation it is ideally suited for younger children. This article describes an evidence based protocol for the safe and effective use of 38% SDF for caries management in the primary dentition.
Optimization of impeller blade number in centrifugal pump for crude oil using Solidworks Flow Simulation
Authors: Aldio Muhammad Fikhri , Waskito Waskito , Purwantono Purwantono , Lapisa Remon
Published: November 2023

Every type of fluid to be transferred has specific characteristics such as viscosity, density, friction, and others, thus requiring the selection of the appropriate pump type. One of the factors influencing the performance of a centrifugal pump is the number of blades used. This research aims to explore the influence of the number of blades on a centrifugal pump used as a fluid transfer device for crude oil. The study was conducted using the Computational Fluid Dynamics (CFD) method. The analyzed variations of the number of blades included three options, namely centrifugal pumps with 12, 14, and 16 blades. Based on the simulation results conducted using Solidworks Research License 2021-2022 software, it was found that the centrifugal pump with 12 blades exhibited the most optimal performance. The simulation results show uniform flow and pressure around the mid-span plane of the 12-blade impeller. In the case of the 12-blade impeller, the flow thrown by the centrifugal force is concentrated in the middle of the channel towards the outlet, resulting in higher pressure and volume flow rates.
Colorimetric detection of formaldehyde using gold nanoparticles modified with 4-aminophenyl sulfone
Authors:   , Kritanusorn Arnupab
Published: November 2023

This research aimed to develop a colorimetric method for the determination of formaldehyde on a paper-based device, using 4-aminophenyl sulfone for surface modification of gold nanoparticles (AuNPs) with an amine group that can react with formaldehyde in the presence of hydroxylamine hydrochloride. The process resulted in the aggregation of modified gold nanoparticles (modified-AuNPs) induced by formaldehyde in the presence of hydroxylamine hydrochloride. To verify this aggregation, the modified-AuNPs were characterized using ultraviolet-visible spectroscopy (UV-vis) and Transmission electron microscopy (TEM). This method offers a high sensitivity and selectivity for the determination of formaldehyde over other chemical and ions. The color change of modified-AuNPs from red to blue can be monitored by naked eyes.  The relevant calibration curves was linear in the range of 40 - 110 µg mL-1 (R2 = 0.9979) and the limit of detection was found to be 35 µg mL-1 by using ImageJ software for image processing. This developed method was applied to detect formaldehyde in real samples (e.g. food and environmental), which the results were in good agreement with those obtained from the standard methods.
Fabrication of metal ion sensing devices based on porphyrin-immobilized papers
Authors:   , Prabphal Jutamat
Published: November 2023

Contaminations of heavy metals in water sources can pose serious hazards to human health and the environments. Commercially available techniques are usually expensive and require highly skilled operators. Thus, inexpensive and simple sensing devices for monitoring heavy metals have been developed in recent years. In this research, charged porphyrins including tetrakis(4-sulfonatophenyl)porphyrin (TSPP) and tetrakis(N-methyl-4-pyridyl)porphine tetraiodide (TMPyP) were synthesized and investigated for their abilities as sensors for metal ions via UV-vis absorption and fluorescence modes of detection. Furthermore, these molecules were also deposited on paper support to evaluate their abilities as paper-based sensors. It was found that both porphyrins could detect Hg²⁺ and Cd²⁺ via colorimetric changes, while both could sense Cu²⁺ via the reduction of fluorescence signals. However, due to the clearer color changes of TSPP and simpler synthetic methods, the molecule was selected as an exemplary module for integration between organic synthesis and real-world analytical applications in practical organic chemistry course. On the other hand, TMPyP, with its stronger interaction with cellulose surface, was fabricated as a more ready-to-use paper-based Cu²⁺ sensing device. This device was found to be able to sense Cu²⁺ with a limit of detection of 2.41 µM, and could be used to analyze Cu²⁺ in commercial drinking waters and tap water with the percent recovery in the range of 94-100%. Moreover, distance-based microfluidic paper devices based on fluorescence quenching were also developed – this could sense Cu²⁺ in the range of 13-57 µM.
ADSORPTION OF SMALL GASES IN MIL-127 METAL ORGANIC FRAMEWORKS
Authors:   , Pongsajanukul Pavee
Published: November 2023

Material of Institut Lavoisier -127 (MIL-127) is one of series of porous metal-organic frameworks (MOFs) that have many potential applications such as gas storage and separation, catalysis, and biological applications. MIL-127 is composed of trimers of iron(III) and 3,3’,5,5’ - azobenzenetetracarboxylate anions. To gain insight into the adsorption behavior and the dynamic behavior of small gases in MIL-127, we carried out Gibbs Ensemble Monte Carlo (GEMC) and Molecular Dynamics (MD) simulations. Firstly, the structure of MIL-127(Fe) was constructed from XRD result. Force field parameters were carefully selected. Different parameter sets from both quantum calculations and literatures have been employed. Their results were compared with each other and with experiments to find the one that can well reproduce the adsorption isotherm of small gases in MIL-127(Fe). Radial distribution functions (RDFs) and probability density were done to elucidate behavior of small gases. From simulations, the preferential adsorption sites of carbon dioxide is around the metal cluster zone of MIL-127(Fe) in contrast to adsorption sites of carbon monoxide which prefers to adsorb around organic linker zone. Finally, selected parameters were used to investigate the structure and self-diffusion of the guest molecules in the MIL-127(Fe). The self-diffusion coefficient of carbon dioxide is in the range of 1-3×10-9 m2/s and the self-diffusion coefficient of carbon monoxide is in the range of 4-14×10-9 m2/s.
Suzuki cross-coupling reaction catalyzed by palladium nanoparticles supported on calcium carbonate
Authors:   , Chotnitikornkun Sukumaporn
Published: November 2023

In this work, we report the first use of an eco-friendly palladium catalyst supported on individual calcium carbonate plates (Pd/ICCP) catalyst which has been made from shell waste to use as heterogeneous catalyst in aqueous Suzuki cross-coupling reaction. The Pd/ICCP is prepared from impregnation-reduction method and completely characterized by SEM, EDX, TEM, and ICP-OES techniques. The results indicate a high dispersion of palladium (0) nanoparticles (5-8 nm) on a highly uniform ICCP support (3 micrometer) providing palladium content of 5.5 %wt. For catalytic activity, the use of 2 mol% of Pd/ICCP is generally sufficient with potassium carbonate as a base for aqueous Suzuki cross-coupling reaction in two solvent systems including EtOH:H₂O (3:2) and CTAB/H₂O. Both reaction conditions successfully catalyze the reaction between various aryl halides (iodide and bromide) and arylboronic acids at 40 °C to give biaryl products in 70-100 % yields without remaining starting materials. In comparison with Pd/CaCO₃, Pd/SP and Pd/C, Pd/ICCP exhibits the highest reusability and lowest metal leaching. It can be reused up to nine times with NMR yield of more than 80% retained. The high catalytic activity and reusability of Pd/ICCP catalyst has been ascribed to the highly uniform ICCP support and strong chelation between Pd(0) and trace protein on ICCP support. Moreover, the microwave process has been successfully applied to Suzuki reaction using Pd/ICCP catalyst which can considerably reduce reaction time to only five minutes without left over starting material. Furthermore, Pd/ICCP catalyst can be adapted to the continuous-flow Suzuki reaction. The use of only 0.5%wt of Pd/ICCP can drive reaction completely within two hours of residence time. Therefore, Pd/ICCP is demonstrated to be a highly effective heterogeneous catalyst for aqueous Suzuki reaction in conventional batch, continuous-flow, and microwave processes.
Development of microfluidic paper-based analytical device for determination of creatinine in urine samples
Authors:   , Sununta Suphanan
Published: November 2023

The simple, low-cost and portable microfluidic paper-based analytical devices (µPADs) for colorimetric determination of creatinine in urine samples were developed. The methodology was based on Jaffé reaction between the creatinine and picric acid in alkaline medium generating a colorimetric creatinine-alkaline picrate complex. The product exhibits an orange color which is clearly visible on µPADs. The color intensity of the complex which is indicative of the concentration of creatinine is then quantitatively determined using ImageJ software. Various experimental parameters were optimized, i.e., concentration of picric acid, concentration of sodium hydroxide, and reaction time, and the best analytical performance was achieved with 0.04 M picric acid, 2 M sodium hydroxide, and 25 minutes of reaction time. Under the optimum conditions, a wide linear range was obtained in the range of 0.2 – 1 mM with a limit of detection (LOD) and a limit of quantitation (LOQ) of 0.08 mM and 0.26 mM, respectively. Moreover, this method provided a selective determination of creatinine and showed a good reproducibility with a precision of 2.85, 1.10 and 1.64 %RSD for the detection of creatinine at 0.2, 0.6 and 1 mM, respectively. The accuracy of the proposed method was not significantly different from the standard Jaffé method by a paired t-test at 95% confidence interval. Finally, the developed devices were successfully applied for the determination of creatinine in urine samples with %recoveries in the range of 91.06-102.86%.
Synthesis of magnetic calcium phosphate composites using citric acid as additive for removal of cadmium from aqueous solution
Authors:   , Hoang Trang
Published: November 2023

Magnetic calcium phosphate composites were successfully synthesized in the presence of citric acid via one-pot synthesis. The phase of calcium phosphates was normally found as hydroxyapatite phase (Hap). However, the metastable phase of amorphous calcium phosphate (ACP) could occur in the presence of preformed Fe3O4 particles and citric acid. Fe3O4 might prevent the aggregation of calcium phosphate nuclei, and citric acid was found to inhibit the transformation of ACP into Hap. The inhibiting ability of citric acid depended strongly on the species of citric acid in the solution. The fully-deprotonate form promoted Hap, while the less deprotonated species yielded ACP. The materials were characterized by XRD, FTIR, elemental analysis, DSC, surface area analyzer, TEM, SEM, and VSM. Under external magnetic field, the used adsorbents were removed easily from aqueous solution showing high potential for convenient separation. 

Among the prepared magnetic calcium phosphate composites, the ACP/Fe3O4/citric sample having Ca/P ratio of 1.5 shown the highest cadmium capacity. The adsorption isotherm and kinetics of this adsorbent were fitted with Langmuir model and pseudo-second-order model, respectively. The maximum adsorption capacity achieved from the Langmuir model was 270.3 mg g-1. The sorption mechanism was found to be cation exchange between Ca2+ in calcium phosphate materials and Cd2+ in the solution. Higher cadmium capacity was achieved from the materials having lower crystallinities. The cadmium adsorption capacity increased when the initial pH of the Cd2+ solution increased from 2 to 3, and remained constant between pH of 3 to 7.
Adsorption of anti-inflammatory drugs from aqueous solution using Chitosan-modified waste tire crumb rubber
Authors:   , Phasuphan Warintorn
Published: November 2023

In this research, waste tire crumb rubber was modified by polymeric chitosan to be used as a novel modified adsorbent for the removal of anti-inflammatory drugs including ibuprofen, diclofenac, and naproxen from aqueous solution. The chitosan-modified adsorbent was characterized by infrared spectroscopy, elemental analysis, and thermogravimetric analysis. The appropriated types and amount of chitosan were determined. The pHpzc, investigated by mass titration method, was 6.01. The efficiency of anti-inflammatory drug adsorption using the adsorbent strongly depended on the solution pH. Ibuprofen, diclofenac, and naproxen were greatly adsorbed over pH ranges of 4-9, 5-10, and 3-10, respectively. The optimal solution pH for all three anti-inflammatory drugs removal is 6, at which the adsorption amounts of ibuprofen, diclofenac, and naproxen were 3.20, 10.94, and 0.53 mg/g, respectively. The adsorption equilibria of ibuprofen and diclofenac were reached in one hour while naproxen adsorption took two hours. The adsorption processes of all drugs followed the second-order kinetic model. The adsorption isotherm of these drugs onto the modified adsorbent was fitted with Freundlich isotherm model better than Langmuir isotherm model. Finally, the chitosan-modified adsorbent was applied to remove the anti-inflammatory drugs from real water samples, i.e., Chulalongkorn University’s pond, canal water (untreated water), and tap water with satisfactory results. Therefore, the chitosan-modified waste tire crumb rubber adsorbent was the novel adsorbent which has the potential to be an economical and effective adsorbent for the removal of anti-inflammatory drugs.
Method development for determination of total vitamin K using screen-printed graphene electrode
Authors:   , Jesadabundit Whitchuta
Published: November 2023

In this work, a new method based on square-wave anodic stripping voltammetry (SWASV) technique using screen-printed graphene electrode was developed for a highly sensitive determination of trace total vitamin K (VK) in dietary supplement. The determination using SWASV consists of two steps. First is accumulation step at more negative potential constantly to preconcentrate and to change the substance from quinone to hydroquinone. For second step, the potential was scanned towards the positive direction for oxidation analysis. To enhance sensitivity, the various experimental parameters such as pH of electrolyte solution, accumulation potential, accumulation time, frequency, step potential, and amplitude were studied. Under the optimal conditions, the relationship between oxidative currents and concentrations of VK was linearity in the range of 1 to 15 µg mL-1 with a correlation coefficient of 0.9904 and limit of detection of 0.099 µg mL-1. Furthermore, the relative standard deviation for three concentrations of VK at 5, 10, and 15 µg mL-1 were 3.29, 3.18 and 3.16 (n=10), respectively. To evaluate efficiency of the proposed method, it was applied for the determination of total vitamin K in some dietary supplements with satisfactory recovery data in the range of 90.1 – 108.1%. The results obtained were in good agreement compared to standard method. The RSD was acceptable in the range of 1.7 to 6.9%. Such high sensitivity and reproducibility, therefore, the proposed method can be used as an alternative method for quality control of VK in dietary supplement.
Association of RRM1, ERCC1 and CTR1 polymorphisms with response and toxicities of gemcitabine-platinum chemotherapy in patients with unresectable cholangiocarcinoma
Authors:   , Pongmaneratanakul Skolchart
Published: November 2023

Gemcitabine-platinum chemotherapy is the treatment of choice for unresectable cholangiocarcinoma, however, the response rate is still low and varies among individuals. Several studies have been investigated the biomarkers which can predict the response of treatment, but results are controversial. This is a cohort study to assess the association of RRM1, ERCC1, and CTR1 polymorphisms with response and toxicities of gemcitabine-platinum chemotherapy in unresectable cholangiocarcinoma patients. DNA from 33 patients were extracted and genetic polymorphisms were assessed by Taqman allelic discrimination assay. After third cycles of chemotherapy, treatment response and toxicities were evaluated according to RECIST version 1.1 and CTCAE version 4.03, respectively. The response rate and tumor control rate for 31 evaluable patients was 9.7% and 71%, respectively. There were no association between genetic polymorphisms and response rate as well as tumor control rate. The results showed that CTR1 polymorphisms were related with risk of alkaline phosphatase increasing (p=0.035). For further analysis, genetic polymorphisms were combined to observe their effects. RRM1 and CTR1 polymorphisms was related with risk of neutropenia (p=0.039) and severity of leukopenia (p=0.048). ERCC1 polymorphism in combination with CTR1 polymorphism (CC/GG) was associated with response rate (p=0.018). Carriers of CT/GT showed higher risk of neutropenia (p=0.024) and weight loss (p=0.010) than carrier of the other genotypes. Our results suggest that genetic polymorphism combinations were related with toxicities and may be potential biomarkers for unresectable cholangiocarcinoma patients treated with gemcitabine-platinum regimen.
BUFFER-OVERFLOW PROTECTION USING BOUNDARY BIT
Authors:   , Chiamwongpaet Sirisara
Published: November 2023

Boundary Bit is a new architectural bound-checking approach for preventing against buffer-overﬂow attacks. It adds an associated bit to each memory entry to support bound checking. To make a boundary, software can simply set a (boundary) bit. On memory writing, hardware will dynamically validate limit using the boundary bit. With a minimal hint from software (compiler), our architectural design eliminates most (if not all) types of buffer-overﬂow attacks, including attacks on non-control data (variables and arguments) and array-indexing errors. Software can easily support Boundary Bit with few (minor) modiﬁcation. Boundary Bit is secure and efﬁcient with few (none) performance degradation. Our implementation shows that hardware can absorbed most bit-scanning overhead by using bitmap. An 1-level bitmap with proper size is better than a 2-level bitmap.
DEVELOPMENT OF DENSITY BASED CLUSTERING ALGORITHMS FOR STREAMING DATA
Authors:   , Laohakiat Sirisup
Published: November 2023

Streaming data has played important role in many data mining applications. Different from traditional data sets which the whole data records are available at the beginning, streaming data accumulate over time, and usually due to its continuous flow of data records, the volume of this kind of data set is usually large. Several algorithms for clustering streaming data have been designed in accordance with these restrictions. In this study, some further constraints on the characteristics of the data set are considered; in order to design density based clustering algorithms which can cluster these data sets efficiently. The designed algorithms have been tested against some state-of-the-art algorithms to determine the effectiveness of the proposed algorithms.
In vitro biological properties of phyllanthus emblica, manilkara zapota extracts and their combinations for cosmetic applications
Authors:   , Sakdawattanakul Rapeekan
Published: November 2023

The changes in skin conditions involve several pathways. Natural extract has been included to improve the skin condition. However, single extract with several properties is barely available. The purpose of this study is to investigate the effect of individual amla and sapota fruit extracts and their combinations at the ratio of 5:1, 1:1 and 1:5 on in vitro antioxidant, anti-inflammatory, anti-collagenase, anti-elastase and anti-tyrosinase activities. The antioxidant and anti-inflammatory activities were determined by DPPH radical scavenging assay and by nitric oxide radical scavenging assay, respectively. Anti-collagenase, anti-elastase and anti-tyrosinase were analyzed by EnzChek® gelatinase/collagenase assay kit, EnzChek® elastase assay kit and DOPA chrome method, respectively. Ethanolic amla extract exhibited the strongest antioxidant and anti-inflammatory activities with IC50 of 1.84 ± 0.1 and 17.31 ± 0.37 µg/ml, respectively, while ethanolic sapota eaxtract revealed the highest anti-collagenase and anti-elastase activities with IC50 of 65.68 ± 3.63 and 36.82 ± 0.72 µg/ml, respectively. For anti-tyrosinase activity, sapota extract showed low activity with IC50 of 5862.52 ± 169.5 µg/ml whereas it was undetectable in amla extract. Combination amla and sapota extract at the ratio of 5:1, 1:1 and 1:5 provided antioxidant activity with IC50 of 2.21 ± 0.15, 3.13 ± 0.06 and 7.3 ± 0.73 µg/ml, respectively, and showed anti-inflammatory activity with IC50 of 19.72 ± 0.35, 31.14 ± 0.49 and 68.8 ± 1.35 µg/ml, respectively.  Combination containing amla as a main constituent showed the highest activities. For anti-proteinase activity, their combination at the ratio of 5:1, 1:1 and 1:5 exhibited anti-collagenase activity with IC50 of 78.9 ± 3.42, 74.48 ± 1.61 and 68.68 ± 2.69 µg/ml, respectively, and revealed anti-elastase activity with IC50 of 150.72 ± 7.9, 71.9 ± 5.06 and 36.22 ± 0.99 µg/ml, respectively. Sapota showed a predominant in both activities and the combination which contained sapota as a main constituent exhibited the highest in both activities. The combination index (CI) at median condition of most combination ratios were exhibited additive effect, except combination 1:1 in antioxidant, combination 5:1 and 1:5 in anti-inflammatory, combination 5:1​ in anti-collagenase and combination 1:5 in anti-elastase activities which showed synergistic effect. Interestingly, combination 1:5 provided potent antioxidant and good anti-inflammatory activities from the effect of amla extract, moreover, it obtained effective anti-elastase and good anti-collagenase from the effect of sapota extract. This combination, therefore, may enhance overall cosmetic properties and may be further included as an active ingredient in cosmetic product.
Effect of calcium carbonate nanoparticles on in vitro photoprotection efficiency of physical sunscreens
Authors:   , Yuensook Wachiraphon
Published: November 2023

Physical sunscreens are safer, more photostable and broader spectral protection but exhibit lower SPF than chemical sunscreens. In this study, calcium carbonate nanoparticles were combined with both titanium dioxide and zinc oxide to improve UV protection efficiency. Speed and duration of high speed disperser were varied to investigate suitable dispersing condition in dimethicone oil. The results showed that speed of 2000 rpm and duration of 10 minutes was the optimal condition.

Concentrations of physical sunscreens and calcium carbonate were varied to study the UV improving protection using UV-Visible spectrophotometer. It was found that addition of calcium carbonate can improve UV absorption in every physical sunscreen concentrations. The enhancing results were confirmed by evaluating the sun protection factor SPF and UVA protection factor UVA-PF values using SPF analyzer. Titanium dioxide combined with calcium carbonate resulted in synergistic effect on UV protection whereas the combination of zinc oxide and calcium carbonate exhibited only additive effect. Therefore, titanium dioxide combined with calcium carbonate was chosen to be formulated in water in oil (w/o) and oil in water (o/w) emulsions to investigate for suitable emulsion type. The results showed that w/o had better SPF and UVA-PF values than o/w (p<0.05). In conclusion, calcium carbonate nanoparticles can be used as photoprotection enhancer for both physical sunscreens. The enhancement was especially high for titanium dioxide where it can reduce the level of titanium dioxide used in the formulation.
Water balance and safe yield in the quaternary aquifer of phrae basin
Authors:   , Taraka Karun
Published: November 2023

Phrae province has experienced a drought problem, especially in dry season. The aims of this research were to evaluate the spatio-temporal distribution of groundwater recharge into the Quaternary unconsolidated sedimentary aquifers as well as to assess groundwater balance and suitable safe yield of the aquifers. The research was divided into two main parts as follows: in the first part, surface water modeling, namely, SWAT. The results showed that runoff after land use changes from 2003 to 2009 appeared to be significantly increased in all sub-watersheds in a range from 4.94% (station Y.38) to 77.64% (station Y.24). The groundwater recharge of each sub-watershed was in a range from 14.62 mm/yr to 433.86 mm/yr. Interestingly, not only the impact of land use causes the increase of runoff hydrograph, but it also results in gradually decreasing in the percentage of groundwater recharge (as compared to total annual rainfall) of each sub-watershed, ranging from 0.26% (station Y.6) to 5.12% (station Y.36).

In the second part, after evaluating the amounts of monthly groundwater recharge from the previous part by SWAT model, the groundwater model, so-called, visual MODFLOW. We found that groundwater balance in the aquifers was approx. +665.69 m3/yr and the suitable safe yield in the aquifers should not increase the pumping rate exceeding over 50%, as compared to the base case. The results of this research will benefit for implementing the sustainable water management plan, in terms of the integration of surface water and groundwater resources and can be further used as a database for government agency in the future.
The impact of learning-centered leadership on teacher engagement in professional learning in Thailand
Authors:   , Piyaman Patnaree
Published: November 2023

This study explores the role of learning-centered leadership in fostering teacher trust, teacher agency, and teacher engagement in professional learning in Thailand. The research employed a mixed method with sequential explanatory design. Quantitative analysis employed confirmatory factor analysis and structural equation modeling to define the measurement model. Qualitative research is conducted through an in-depth interview and focus-groups with principals, middle-level leaders, and teachers to elaborates on the quantitative findings and to gain further insight about the relationship of principal leadership and teacher learning. Research results affirmed the role of learning-centered leadership in fostering teacher engagement in professional learning and highlighted teacher trust and teacher agency as the two significant mediators. The study also suggests human resource gap between urban and rural schools. In addition, the research introduces new model of leadership for teacher learning in Thailand, which consists of eight practices: Teacher/Leader collaboration, Open/Supportive environment, Support through various sources/approaches, Internal/External learning opportunities, Coaching/Mentoring program, Teacher research program, Continuous evaluation system, and Cultural competency.
GROWTH OF SELF-CATALYZED GaAs NANOWIRES BY MOLECULAR BEAM EPITAXY DIRECTLY ON GaAs (111)B SUBSTRATES
Authors:   , Vorathamrong Samatcha
Published: November 2023

This dissertation is a systematic investigation to improve the growth method of GaAs nanowires by molecular beam epitaxy via self-catalytic VLS mode. The nanowire can be grown directly on GaAs (111)B substrates instead of SiO2-covered substrates. The merit of this technique is to eliminate the common problems that occur with nanowires grown by conventional VLS mode such as tilted nanowire, and parasitic structure. Growth parameters namely Ga flux pressure, and growth temperature were varied to search the optimal conditions to grow nanowires. After obtaining the optimal conditions, the nanowire growth was performed on both GaAs (111)B and SiO2 coated Si (111) for a comparison. Moreover, the nanowire samples were characterized by in-situ RHEED under varied growth time to study the growth evolution. Results show that GaAs nanowires are able to form directly on GaAs (111)B substrates without the existence of tilted wire, and parasitic structure. Density of nanowires increases with increasing the growth temperature however the growth rate remains nearly constant under a constant Ga flux in the optimal growth temperature. Nanowires grown by our method adopt WZ structure unlike conventional VLS nanowires which mostly adopt ZB structure, this is likely to be a result from different surface energy of substrate surface. Growth evolution shows that nanowires started forming as small dots before elongating to nanowire structure. Dots that unable to become nanowires are crystallized under As pressure to ring-like structure before getting buried by buffer layer. A simple growth model was proposed for better understanding of the self-catalyzed growth mode mechanism with using Ga as seed particles.
Analysis of physiological and psychological responses to odor stimulation
Authors:   , Lin Yan
Published: November 2023

Heart rate variability (HRV) analyses as well as Stress Response Scale-18 (SRS-18) questionnaire were used to evaluate the effect of Jasmine-odor inhalation in males and females. Healthy 15 males (26.3 ± 3.7 years) and 15 females (30.1 ± 3.4 years) participated in the experiment. Standard Lead-II ECG data were collected for resting, control and odor stimulation conditions. The instantaneous heart rate variability tachogram was interpolated with the use of cubic spline interpolation, and then, FFT was performed to find the HRV power spectrum.

HRV frequency domain analysis parameters were low frequency range (LF: 0.04 - 0.15Hz), high frequency range (HF: 0.15 - 0.4 Hz) and the ratio of normalized low frequency to high frequency (nLF/nHF). HRV time domain analysis parameters in this research were heart rate (bpm), the standard deviation of all normal to normal RR intervals (SDNN) and root mean square of successive RR intervals difference (RMSSD).

Experimental results suggest that stress of both males and females decreased after exposing to odor (p<0.05). It was also found that heart rate decreasing rate of males was faster than that of females for odor sets. SDNN and RMSSD parameter were slightly increased in both odor and control experiment but not so much difference in both males and females. The nLF/nHF ratio of males are significantly higher than females in all measurement intervals (p<0.05). This might be intrinsic character of males and females. After odor exposure, the nLF/nHF ratio was slightly decreased in male subjects while it was slightly increased for all control intervals. Decreasing the nLF/nHF ratio might link to decreasing the stress. The nLF/nHF ratio in female subjects was not so much changed in both odor and control intervals with slightly increased trend. The results indicate that ECG measurement could be used to evaluate the stress state quantitatively. It will be alternative technique for stress evaluation other than using the qualitative measurement with SRS scale.
SIMPLE MODEL FOR APPROXIMATION OF MUTUAL COUPLING IN MICROSTRIP PATCH ARRAY
Authors:   , Hor Mangseang
Published: November 2023

A relatively simple and efficient empirical formulation for the estimation of mutual coupling between two microstrip patch antennas has been proposed in this thesis. The formulation is constructed based on the asymptotic behavior of the electromagnetic wave excited by an electric current on a grounded substrate. It is expressed by a few terms of cylindrical wave functions of two variables, which are center-to-center spacing and azimuthal angular separation between two antennas. The formulation contains coefficients which need to be determined at once, for any given antenna geometry and operating frequency, by matching with few sample values of mutual impedance for several antenna separations using the least square method. The latter are calculated by a rigorous full-wave analysis using a commercial software. The formulation with the obtained coefficients can then be used to estimate the mutual coupling between two similar antennas for any arbitrary separations. The proposed formulation is expected to be far more efficient than the exact solution due to its simple closed form. The proposed approach can be employed to efficiently estimate the mutual coupling between any elements of a microstrip patch array antenna. Some numerical examples are given to illustrate the applicability, validity, and efficiency of the proposed approach. The good agreement of the mutual impedance estimated by the present approach and that obtained by a rigorous full-wave solution has been demonstrated.
Application of linear multi-agent system approach to design building temperature control system
Authors:   , Pham Tuynh
Published: November 2023

Building temperature control system (BTCS) is a large-scale interconnected system with a high demand of energy consumption in building. BTCS is generally described by linear time-invariant system using electric-analogous devices such as resistors and capacitors. In view of graph theory, it is modeled as linear multi-agent system (MAS) subjected to undirected communication topology. The main goal of BTCS is to track the reference temperature trajectory which is equivalent to make the tracking error go to zero in finite time. Hence, BTCS properly suits with framework of distributed control, decentralized control, and centralized control. In this thesis, we focus on comparison of three design methods, namely, distributed consensus controllers (DCC), decentralized iterative learning control (ILC), and centralized ILC. First, the DCC is applied to BTCS by solving resource allocation problem with hard control input constraints. Next, we apply decentralized ILC using the derivative of tracking error (D-type). Lastly, centralized ILC design is formulated as minimization problem with a quadratic cost function subject to control input constraints. This problem is also called Q-ILC. We apply the Alternating Direction Method of Multipliers (ADMM) approach to Q-ILC design and derive analytical solution of control input in each iteration. The convergence property of ADMM and Q-ILC algorithm are given. Numerical results are provided to illustrate the effectiveness of these algorithms.
THE EFFECT OF EDTA IRRIGATION TIME ON THE MICROTENSILE BOND STRENGTH OF RESIN SEALERS AND ROOT CANAL DENTIN
Authors:   , Pansawangwong Sutt
Published: November 2023

Introduction: Several studies have recommended the use of EDTA as a final flush before root canal obturation, but the optimal irrigating time remains unverified. The aim of the study was to determine how the duration of EDTA irrigation affects microtensile bond strength. Materials and methods: The 160 extracted human premolars were decoronated and embedded in resin block. Root canals were prepared by using the rotary files (Protaper Universal) and distilled water irrigation, and irrigated with 5% NaOCl. In Group 1, this was followed by irrigation with distilled water, while in Groups 2–5, this was followed by irrigation with 17% EDTA for 1, 3, 5, and 10 min, followed by distilled water. Two specimens of each group were used for scanning electron microscopic (SEM) observation. The remaining specimens were divided into 2 groups—AH Plus and MetaSEAL (n = 15 each). The specimens were prepared for microtensile tests. The failure mode was identified, and the bond strength value was analyzed using one-way ANOVA and Tukey’s HSD post-hoc test. Results: The 10-min EDTA-treated specimens (Group 5) showed greater microtensile bond strength than non-EDTA-treated specimens (Group 1) (p < 0.001) in MetaSEAL group. Mixed failure accounted for the majority of failures in all groups. In SEM, the NaOCl group showed a smear layer covering the dentin surface, but the EDTA groups showed an absence of smear layer and various depths of demineralized dentin and exposed collagen. Conclusions: The duration of EDTA irrigation affected on the microtensile bond strength of the methacrylate resin sealer and root dentin.
Domestic flight timetabling to increase connecting passenger
Authors:   , Deewattanarkul Natravee
Published: November 2023

In the air transportation market, the competition has been increasingly intense throughout the period in term of price, service quality and route variety. In order to create the competitive advantage, the strategy is the core competency that use to build the appropriate operation planning for the future development.

The case studied airline is the subsidiary of the Thai airline, and the objective is to increase connecting passenger from the main airline. Therefore, the appropriate flight timetabling is necessary to effectively and efficiently serve passengers’ desires. This project is developed to generate the corresponding flight timetable to the business strategy by using the Wave-System Structure and heuristic approach; Branch-and-Bound, Greedy Algorithm, which help in the decision-making process. Moreover, Holt-Winter’s model are also used to forecast market demand base on the historical passenger demand’s behaviour.

From the result of project, the new flight timetabling development has increased the connecting passenger by 46.67% and also increase the variety of connecting destination as well. The benefit of the new flight timetabling would positively affect the aircraft utilisation.
Post-roast Moisture Process Improvement of Fish Sheet Production Process
Authors:   , Jitapunkul Thananat
Published: November 2023

The primary concern of this thesis is moisture control of fish sheets produced in a Thai factory. The moisture control of fish sheets is important because these fish sheets are primary work-in-process products used in the factory, and the sheets’ post-roasting moisture is a key quality metric for fish sheets. The factory initially used ad-hoc subjective procedures to control moisture level. However, it is found that variation of fish sheets’ moisture at all stages of production remains high, making it a subject of process improvement in this thesis. The Cpk index of post-air-drying and post-roasting fish sheets, measured at the start of the project, are 0.19 and 0.04 respectively. This report will present and evaluate two process improvement methods implemented in the factory. The first method modifies ingredient mixing procedures such that the quantity of water in ingredient mixture are adjusted based on measured moistures of frozen minced fish which is the primary non-water ingredient in the mixture. To avoid subjective adjustment of control parameter values, the second improvement finds an optimised set of values for post-mixing processes’ parameters, using response surface generated with regression analysis on data collected in a design of experiments. After improvement, the post-air-drying Cpk index and the post-roasting Cpk index were improved to 0.75 and 0.46 respectively.
MECHANISMS LINKING BELIEFS AND LANGUAGE ACHIEVEMENT OF THAI EFL UNDERGRADUATE STUDENTS: A STRUCTURAL EQUATION MODEL
Authors:   , Adithepsathit Urairat
Published: November 2023

This study aimed at 1) examining English achievement levels of Thai EFL undergraduate students, 2) describing their beliefs, attitudes, motivation and language learning strategies, and 3) exploring the causal relationships among beliefs, attitudes, motivation, language learning strategies, and language achievement. The total of 848 participants enrolling in two foundation English courses at Prince of Songkla University (PSU), Surat Thani Campus were included. The instruments comprised Achievement Tests and a set of questionnaire. The findings revealed that most participants were less proficient learners. Their problematic points were limited vocabulary and grammatical knowledge, misspelling, and mispronunciation. They believed that vocabulary, culture, grammar and translation knowledge, including learning in English-speaking countries were very important in English learning. Beliefs, thus, seem to be essential foundation for their language learning. However, most of them did not believe that they had special abilities to learn a foreign language. They expressed their positive attitudes toward English-speaking people and teachers, but did not do so toward English courses. They realized the importance of English in terms of integrative and instrumental orientation. The participants reflected their anxiety in English use and English class. They only expected themselves to do simple tasks/activities. They held high motivational intensity, but did not show their full attention nor great persistence in learning. Moreover, the participants were moderate strategy users. With SEM technique, the two achievement models showed that attitudes, self-efficacy and motivational behavior were mediators causally linking the beliefs and achievement, and all the path coefficients were statistically significant, except the one from language learning strategies to achievement. The models fitted to the data well.
КОРОТКОЗОРІСТЬ ЯК НАСЛІДОК ФАБІНГУ
Authors: Венгер Л. В. , Коновалова Н. В. , Єпішева С. М. , Іваницька О. В.
Published: November 2023

Для збереження зорового здоров’я студентів та учнів треба виробити алгоритм роботи з комп’ютером, правильно скласти розклад роботи
і відпочинку. Феномен фабінгу є розповсюдженим явищем серед студентів-медиків, що впливає на зниження зору і виникнення міопії. Читання на
близькій відстані (<30 см) і безперервне читання (>30 хвилин), незалежно
один від одного збільшували ймовірність короткозорості. Дані нашого дослідження дають змогу стверджувати, що явище фабінгу пов’язане з соціально-психологічним функціонуванням студентів і може впливати на процес навчання та розвиток особистості. Слід навчати студентів та учнів
правильній нешкодливій роботі з комп’ютером та гаджетами
Promoting digital culture in organizations: theory and solutions
Authors:   Banking Academy of Vietnam, Phạm Mạnh Hùng , Nguyễn Nhật Minh
Published: November 2023

: In recent years, with the rapid development of technology and the Internet, building a digital culture is an important factor that helps organizations adapt and succeed in today’s increasingly competitive business environment. Accordingly, digital culture not only ensures efficiency and flexibility in an organization’s operations, but also plays an important role in creating value for customers and helping the organization enhance its reputation. Using the method of overviewing previous studies, this paper reviews the theoretical framework of digital culture including the concept, characteristics and role of digital culture for organizations. Besides, this paper also points out the challenges that organizations encounter in the process of building digital culture. Finally, this article proposes some solutions to promote the building of digital culture in organizations in general and the Banking Academy of Vietnam in particular.
Bachelor of banking education in Banking Academy of Vietnam in the digitalization context
Authors:   Banking Academy of Vietnam, Phạm Thu Thuỷ
Published: November 2023

Bachelor of Banking is the most outstanding program of Banking Academy of Vietnam. The program proudly educated a lot of bank executives and professional bankers. In the context of digitalization has strongly changed the banking business and the bachelor pedagogy, Banking Faculty, Banking Academy of Vietnam has revised the Bachelor of banking (standard program and advance program) in 2021 and 2022. The paper analyzes the requirements of educating Bachelor of Banking in digitalization context, the recent renovation of Bachelor of Banking by Banking Academy of Vietnam, and some suggestions to increase the education quality. The paper can be a reference for universities in educating Banking and Finance specialization.