Time Series Analysis for Fail Spare Part Prediction: Case of ATM Maintenance

Prediction of failed spare parts is an interesting issue in inventory management. Our work applied predictive analytic to forecast future amount of failed spare parts. This research used maintenance time series data from year 2013 to 2016 to train and test data for a prediction model. In the preprocessing step, we looked into new features based on historical data set. Then, we added the day of week feature into the example of the data set. The day of week feature had an impact to spare parts prediction model. Moving average and windowing methods were used in the preprocessing phase before sending through the prediction model. Artificial neural network and support vector machine for regression were applied to predict the amount of failed spare parts. The experiments demonstrated the average accuracy of failed spare part prediction. The result represented that the support vector machine for regression showed the best accuracy at 88.24%. SVR yielded the highest prediction accuracy at 92.7%

Curcumin-Hydroxypropyl-β-Cyclodextrin Inclusion Complex Preparation Methods: Effect of Common Solvent Evaporation, Freeze Drying, and pH Shift on Solubility and Stability of Curcumin

Purpose: To evaluate the effect of the preparation method on the inclusion complex of curcumin and hydroxypropyl-β-cyclodextrin (HP- β -CD).Methods: HP-β-CD was selected to prepare an inclusion complex with curcumin at a molar ratio of 1:1. The inclusion complexes were prepared using three different methods: common solvent evaporation (CSE), freeze drying (FD), and pH shift. The inclusion complexes were characterized by differential scanning calorimetry (DSC) and fourier transform infrared (FTIR) spectroscopy. The content, solubility, dissolution, and stability of the complexes were evaluated and compared with curcumin and their physical mixture.Results: Formation of inclusion complexes was confirmed by DSC and FTIR results. CSE and FD methods gave a high content of curcumin in the inclusion complexes (> 88.39 %), while pH shift gave a lower content (64.04 %). All three methods significantly (p < 0.05) increased curcumin solubility (> 276.43-fold). However, higher stability complexes were obtained using CSE and FD methods.Conclusion: Among the three preparation methods (CSE, FD and pH shift) used for the inclusion complexes, CSE is the most suitable method for preparation of curcumin-HP-β-CD inclusion complex for increased curcumin solubility and stability.Keywords: Curcumin, Cyclodextrin, Inclusion complex, Solubility, Stability, Common solvent evaporation, Freeze drying, pH shif

การนำเซลลูโลสเมมเบรนซึ่งผลิตโดยเชื้อแบคทีเรียมากราฟต์กับพอลิเมอร์ที่มีรอยพิมพ์ประทับตราโมเลกุลเพื่อใช้ในการควบคุมการปลดปล่อยที่เลือกเฉพาะอิแนนทิโอเมอร์ของยาต้านการอักเสบที่ไม่ใช้สเตียรอยด์

Thailand Research Fund (TRF

Genetic relationship of mungbean and blackgram genotypes based on agronomic and photosynthetic performance and SRAP markers

Genetic identification is at the base of parental selection in varietal development programs. Agronomic and photosynthetic characters and sequence-related amplified polymorphism (SRAP) markers were analyzed for two legume species which included 23 mungbean (Vigna radiata (L.) Wilczek) and four blackgram (Vigna mungo (L.) Hepper) genotypes. The results revealed that the seeds/pod, plant height, pods/plant, pod length, days to flowering, and all photosynthetic characters studied had a significant correlation with the yield/plant. Using UPGMA analysis with phenotypic data, five clusters and two individuals were identified. Twenty-five SRAP primer combinations generated 562 amplified bands, of which 507 were polymorphic (90.2%). The average numbers of scorable and polymorphic bands/primer pair were 22 and 20, respectively. Two major clusters coincided with two species having a 100% bootstrap value. Within the mungbean cluster, there were two subclusters containing 12 and 11 mungbean genotypes. Mantel’s test demonstrated that the polymorphisms given by SRAPs were associated with agronomic and photosynthetic variability (r = 0.734, p < 0.01). These results allow promising mungbean genotypes to be identified through genetic diversity and field performance which can be utilized as potential parents towards future breeding programs. Moreover, the factors which contribute most to yield/plant can be simultaneously used as selection criteria for yield improvement

Improvement of the efficacy of endodontic solvents by ultrasonic agitation

[Excerpt] The success rates of endodontic treatment can reach levels from 86% to 98% (Abitbol et al., 2003). However, apical periodontitis may still persist or develop after treatment due to various factors, namely coronal leakage, caries or fractures, thus enabling reinfection by microorganisms of the oral cavity or proliferation of microorganisms in persisting endodontic infections (Siqueira, 2001, Correia-Sousa et al., 2015, Melo et al., 2017). Endodontic retreatment aims to reduce the bacterial load to a level that enables periapical healing. Nevertheless, its outcome is poor – about 70.9–83% (Torabinejad et al., 2009, Ng et al., 2011). The cleanliness of root canals cannot be accurately assessed through conventional periapical radiography or magnifying devices, but residual gutta-percha is systematically found in micro-CT scans after retreatment (Oltra et al., 2017). Chloroform and xylene have been widely used as endodontic solvents but concerns about their toxicity and potential carcinogenic effect led to seeking alternatives (Tamse et al., 1986, Metzger et al., 2000, Vajrabhaya et al., 2004, Magalhaes et al., 2007). Essential oils, like eucalyptol or orange oil, are one of the most common alternative groups of solvents used to enhance the dissolution or softening of gutta-percha. However, although they are considered less toxic, they are also reported as less powerful (Zaccaro Scelza et al., 2006, Faria-Junior et al., 2011, Martos et al., 2011). Studies show that, despite all the currently available technology, it is still not possible to achieve the complete removal of the potentially infected filling materials, which prevents total debridement and effective bacteria control (Alves et al., 2016, Keles et al., 2016, Rossi-Fedele and Ahmed, 2017). Although solvents have been indicated to prevent complications, such as ledges or perforations, in retreatment procedures, the literature reports that their use may hinder the cleaning of the root canal (Horvath et al., 2009). Retreatment can be carried out with or without solvents, but professionals often prefer to remove gutta-percha mainly with instrumentation, even though this may be a longer and less predictable procedure (Sae-Lim et al., 2000, Khalilak et al., 2013). Thus, endodontic solvents have almost fallen out of use. A new insight on endodontic retreatment seems to be necessary. [...]- (undefined

Yolk-sac absorption, mouth size development, and first exogenous feeding of sultan fish, leptobarbus hoevenii

Sultan fish, Leptobarbus hoevenii is an important species for aquaculture in several Southeast Asian countries, including Thailand and Malaysia. However, knowledge on its yolk absorption, mouth size development, and first food ingestion timing is still lacking up-to-date. This information on the correct feeding of the L. hoevenii larvae are crucial to farmers. The present study hence examined these parameters in the L. hoevenii. The newly hatched L. hoevenii larvae were obtained through natural spawning with the aid of chemicals injection, and sampled consecutively every 2 hours to measure their yolk volumes, mouth height, and to confirm the ingestion time of the first Moina into the larval gut. Also, a starvation experiment was conducted to detect the larval point-of-no-return (PNR). It was found that the yolk sac volume of the newly hatched L. hoevenii larvae was 77.51 µm, and it was completely absorbed at 108 hours after hatching (hAH). The larval mouth has first opened at 36 hAH (mouth height 215±22.59 µm) but the larvae only commenced first exogenous feeding on Moina (approximately 207 μm in width) at 62 hAH, when its mouth height reached 372.91±79.11 µm. The L. hoevenii larvae required about 18 hrs from 62–80 hAH, to adapt themselves to feed on the given Moina, and the PNR was estimated to happen at 70–72 hAH. It was recommended that Moina should be given to the L. hoevenii larvae best within 62–72 hAH, at the rearing water temperature of 27 to 29°C

A comparative cytogenetic study of Hypsibarbus malcolmi and H. wetmorei (Cyprinidae, Poropuntiini)

Cyprininae are a highly diversified but demonstrably monophyletic lineage of cypriniform fishes. Here, the karyotype and chromosomal characteristics of Hypsibarbus malcolmi (Smith, 1945) and H. wetmorei (Smith, 1931) were examined using conventional, nucleolus organizing regions (NORs) and molecular cytogenetic protocols. The diploid chromosome number (2n) of H. malcolmi was 50, the fundamental number (FN) was equal to 62, and the karyotype displayed 8m + 4sm + 38a with NORs located at the centromeric and telomeric positions of the short arms of chromosome pairs 1 and 2, respectively. 2n of H. wetmorei was 50, FN 78, karyotype 14m + 14sm + 22a with the NORs at the telomeric position of the short arm of chromosome pair 2. 2n and FN in males and females were identical. Fluorescence in situ hybridization using different microsatellite motifs as probes also showed substantial genomic divergence between both studied species. In H. wetmorei, (CAG)n and (CAC)n microsatellites accumulated in the telomeric regions of all chromosomes, while in H. malcolmi, they had scattered signals on all chromosomes. Besides, the (GAA)n microsatellites were distributed along all chromosomes of H. malcolmi, but there was a strong hybridization pattern in the centromeric region of a single pair in H. wetmorei. These cytogenomic difference across the genomes of these Hypsibarbus Rainboth, 1996 species are markers for specific evolutionary differentiation within these two species

A study of interorganisational collaboration in tourism marketing : a case of analysis of critical preconditions

The formation of collaborative alliances among organisations is becoming widely acknowledged as being a significant strategy in the tourism marketing and management literature. Academic scholars, practitioners, and the public press have reported a number of factors believed to be relevant to decisions regarding collaborative marketing, however, little is known about how and why this phenomenon occurs in a tourism setting. This thesis uses collaboration theory and other related theories to examine critical preconditions of collaboration in tourism destination marketing. This study found that to understand the complexity and dynamic nature of collaborative tourism marketing, integration and synthesis of multiple explanatory theories need to be advanced, particularly economic and sociologically grounded perspectives. Based upon this perspective, a tentative framework for analysis is offered to guide future research inquiry in this field. The study's results, then, suggest a preliminary critical precondition model to collaborative formation. The model illustrates the dynamic nature of this collaborative phenomenon. Environmental forces, past experiences, perceived benefits associated with present collaborative activity, anticipation of future relationships, have all been found to influence the formation of collaboration in tourism marketing. Implications for future research and practice are, finally, set forth

การประยุกต์ใช้พอลิเมอร์ที่มีรอยพิมพ์ประทับโมเลกุลสำหรับการนำส่งยาและการแยกด้วยเยื่อแผ่นของยาไครัล

Thesis (Ph.D., Pharmaceutical Sciences)--Prince of Songkla University, 200