人の集団に関する新たな評価方法の考察

九州大学応用力学研究所研究集会報告 No.20ME-S7 「非線形波動の数理と物理」RIAM Symposium No.20ME-S7 Mathematics and Physics in Nonlinear waves本研究では、金融工学の手法を用いて人の混雑を評価する理論の構築を試みた。我々は、人の混雑を表すダイナミクスは確率項を含むLogistic 方程式に従うと仮定し、この動きを正味現在価値やリアルオプション法によって評価した。また、金融工学では、割引率を用いることによってタイミングによる価値の違いが表現されるが今回のモデルでは、割引率を人の効用を割り引くために導入し、実データに基づく推定・考察もあわせて行った

Catalytic Non-Thermal Plasma Reactor for Stripping the Vocs from Air

Stripping of a mixture of volatile organic compounds containing dilute toluene, 1,4-dioxane and n-hexane from air was studied in a non-thermal plasma reactor operated in a dielectric barrier discharge configuration. Catalyst integration to plasma was carried out by depositing 5 wt% of MnOx and CoOx on the inner electrode, sintered metal fibres (SMF). Experimental results indicated that the removal efficiency of VOCs followed the order: toluene ^gt; n-hexane > 1,4-dioxane; and MnOx/SMF showed better performance compared to CoOx/SMF, probably due its ability for ozone decomposition leading to the formation of atomic oxygen. Water vapour further enhanced the performance that may be assigned due to the formation of OH radical

Unusual presentation of an uncommon lung malignancy

Combined type of small cell lung carcinoma (SCLC) is a rare malignancy of the lung that is usually peripheral and diagnosed after resection. We report an unusual case of centrally located combined SCLC with squamous cell component that was diagnosed on endobronchial lung biopsy

Low cost adsorbents from agricultural waste for removal of dyes

Low cost adsorbents from agricultural waste like rice husk was developed with various activation methods and tested for the removal of aqueous contaminants. Adsorption of a basic dye, malachite green (MG), from aqueous solution onto nitric acid treated (NRH), and peroxide treated rice husk (PRH) have been investigated. Various experiments were studied using batch adsorption technique under different conditions of pH, adsorbent dosage, initial dye concentration, and temperature. The adsorption capacities of MG by the NRH and PRH were essentially due to electrostatic forces. The NRH and PRH adsorbents had a relatively large adsorption capacity (18.1 and 26.6 mg/g). The adsorbent PRH had a higher surface charge at alkaline pH and enhanced removal of MG was obtained under alkaline conditions. Typical adsorption kinetics indicated the pseudo second-order kinetics behavior. The adsorption isotherms obeys Langmuir isotherm model. It was observed that the rate of adsorption improves with increasing temperature and the process is endothermic nature. The negative value of the change in Gibbs free energy (ΔG°) indicates that the adsorption of MG on PRH and NRH is feasible and spontaneou

Degradation of malachite green by dielectric barrier discharge plasma

Oxidative decomposition of aqueous organic pollutant malachite green (MG) was studied in a dielectric barrier discharge reactor operated under ambient conditions. Total organic carbon content analysis confirmed the mineralization of the pollutant leading to the formation of carbon dioxide, which was confirmed by an infrared analyzer. Typical results indicated that the degradation rate increases with increasing applied voltage and decreases with increasing concentration. Dye degradation followed first order kinetics. The intermediate products formed during the degradation of MG were identified by a high resolution mass spectrometer (HR-MS) and proposed a plausible mechanism for the mineralization process

Unusual presentation of an uncommon lung malignancy

Combined type of small cell lung carcinoma (SCLC) is a rare malignancy of the lung that is usually peripheral and diagnosed after resection. We report an unusual case of centrally located combined SCLC with squamous cell component that was diagnosed on endobronchial lung biopsy

Evaluation of occlusal status of teenage patients visiting a dental school in Andhra Pradesh: An epidemiological study

Objectives: The objective of the study was to evaluate the occlusal status of teenage patients and to determine the possible association of gender with the type of malocclusion. Materials and methods: The study sample consisted of 410 patients. Patients who did not fulfil the inclusion criteria for the study were excluded, thus the final sample accounted for 318. The selected subjects were interviewed by trained examiners and underwent thorough clinical evaluation pertaining to orthodontic diagnosis. Statistical analysis: The Pearson′s Chi-square test was done to assess the statistical significance between males and females while taking p-values of less than 0.001 as statistically significant. Results: Among the 318 samples, 166 (52.2%) of them were females and 152 (47.8%) were males. Angle′s class I molar relation was common (69.2%) followed by normal molar relation (10.1%), class III and its subdivision and class II and its subdivision were found common among males and females respectively. In regard to canine relationship, majority of them were class I followed by class II and III- Normal overjet and overbite was observed in 53.5% of the cases and there was higher incidence of increased overjet and overbite in females and reverse overjet in males Conclusion: The prevalence of malocclusion noted in the present study was 89-9% and it was more common in females. Class I canine relationship 96.9% was the most common one followed by class I molar relation (69.2%). Angle class II division 2; canine class III relationship and scissors bite were the least common (0.6%) occlusal alterations

Low-cost adsorbents from bio-waste for the removal of dyes from aqueous solution

Activated carbons (ACs) were developed from bio-waste materials like rice husk and peanut shell (PS) by various physicochemical activation methods. PS char digested in nitric acid followed by treatment at 673 K resulted in high surface area up to ∼585 m2/g. The novelty of the present study is the identification of oxygen functional groups formed on the surface of activated carbons by infrared and X-ray photoelectron spectroscopy and quantification by using temperature programmed decomposition (TPD). Typical TPD data indicated that each activation method may lead to varying amounts of acidic and basic functional groups on the surface of the adsorbent, which may be a crucial factor in determining the adsorption capacity. It was shown that ACs developed during the present study are good adsorbents, especially for the removal of a model textile dye methylene blue (MB) from aqueous solution. As MB is a basic dye, H2O2-treated rice husk showed the best adsorption capacity, which is in agreement with the acidic groups present on the surface. Removal of the dye followed Langmuir isotherm model, whereas MB adsorption on ACs followed pseudo-second-order kinetics

Catalytic Nonthermal Plasma Reactor for Dry Reforming of Methane

Co-processing of two greenhouse gases, methane and carbon dioxide, was carried out in a dielectric barrier plasma reactor. The influence of feed gas proportion on the performance of the plasma reactor was investigated, especially with an objective to increase the conversion of the reactants and selectivity to syngas. To understand the influence of the catalyst on dry reforming, 10-30% NiO/Al2O3 catalysts were prepared by a single-step combustion synthesis and various physicochemical techniques confirmed the formation of nanosized Ni particles. A total of 10% of the discharge volume was packed with Ni/Al2O3 catalysts in a packed-bed configuration. An interesting observation is the increased syngas selectivity on the addition of catalyst to plasma, and among the catalysts tested, 20% Ni showed a H-2/CO ratio of 2.25 against 1.2 with a plasma reactor alone