จำนวน Repository ( 3611 )
การตัดสินใจซื้อ อาหารออนไลน์ของกลุ่มเบบี้บูมเมอร์ ในเขตพื้น ที่กรุงเทพมหานคร
The objectives of this study were to study the demographic factors including gender age status education level occupation and income affecting the decision to buy food online and tostudy the marketing mix and technology adoption that affected the online food purchasing decisions of Baby Boomersin Bangkok. The population was 55-75 years old Baby Boomer who bought food online in Bangkok. The probability sampling specifically the stratified sampling method was used to determine the total of 400 samples. The data was analyzed using descriptive statistics such as frequency percentage mean and standard deviation. The inferential statistics were Independent Sample T-test One-way ANOVA analysis Pearsons Correlation Coefficient and Multiple Regression Analysis The study results showed that the marketing mix factors could meet the demand for online food ordering of the sample in high level. The technology acceptance level of the overall sample group was high. The importance of the 4-step online food purchasing decision process of the samples namely the perception of the need or problem information seeking alternative assessment and buying decisions was high. The hypothesis testing found that on the evaluation of purchasing options different age groups had a statistically significant difference at 0.05. On purchasing decision married samplesand the widows paid more attention to the purchasing decision process differently at the statistical significance of 0.05.On the perception of needs or problems the sample group with bachelors degrees put more emphasis than those who graduated from elementary schoolsand the group who finished secondary education with the statistical significance at 0.05. On the evaluation of purchasing decision options the group with secondary education put less emphasis thanthe group with bachelors degrees at the statistical significanceof 0.01. On purchasing decision the group with secondary education put less emphasis than associate degree graduates with the statistical significance at 0.05 and put less emphasis thanthe group with a bachelors degree with the statistical significance at 0.05. On data acquisition groups with different incomes put different emphasis with the statistical significance at 0.05. Convenience ease of use and consumer factors had a positive influence on the need or problem perception process at the significant level of 0.05. Convenience benefit perception and ease of use factors had a positive influence on the information seeking processat the significance level of 0.05. Value convenience communication ease of useand consumer factors had a positive influence on the process of evaluating purchasing options at the significant level of 0.05. Convenience benefit perception ease of use and consumer factorshad a positive influence on the purchasing decision process at the significance level of 0.05.
การบำบัดน้ำสีย้อมผ้าโดยกระบวนการแอดวานซ์ออกซิเดชันด้วยโอโซน ร่วมกับสารไฮโดรเจนเปอร์ออกไซด์
This research is a study on treatment of Water Dyes from textile dyeing industry by Advance oxidation process with Ozone and hydrogen peroxide (H2O2). In this study Ozone generators with a capacity of 1.0 - 3.0 mg/ hr. were used to study the appropriate factors for treatment with adjusting wastewater conditions (pH 3 pH 7 and pH 11) Ozone exposure distance 120 minute the initial COD concentration is 250 - 1000 mg/l. and adding hydrogen peroxide at 4 8 and 12 ml/l. For the study found that above mentioned factors have an effect on the efficacy of color and COD treatment which the experiment at pH 11 used to Ozone treatment and added 4 ml/l. of H2O2. It makes the highest COD treatment efficiency when compared to pH 3 pH 7 and added more H2O2. it doesn’t affect to the higher of treatment efficiency. In addition it was found that higher initial COD concentration decreased treatment efficiency which the experimental ability for COD treatment has highest value was 46 percent and the COD concentration was 250 ml/l In order that when COD concentration in synthetic color water was increased to 500 ml/l and 1000 ml/l. it was found that the COD efficiency decreased to 31% and 40% respectively. For the treatment of Water Dyes from textile dyeing industry by oxidation process with Ozone together with hydrogen peroxide (H2O2) at pH 7 will has the highest of treatment efficiency. However the consideration of suitability for pH configuration used to treat both color and COD should choose pH 11 because it can treat both color and COD that makes the waste water quality meet the standards required by law. In addition if we consider the effectiveness of turbidity and BOD found that the decrease of dirtiness tends to be in the same direction with COD both 2 parameters.
การปรับปรุงคุณสมบัติเฟร์โรอิเล็กทริกของ0.93(Bi0.5-x/0.93Smx/0.93Na0.5) TiO3-0.07BaTiO3 สำหรับเป็นแหล่งกักเก็บพลังงาน
In this study we investigated the effects of Sm2O3 addition in ceramics 0.93(Bi0.5- x/0 . 9 3Smx/0 . 9 3Na0 . 5 ) TiO3 - 0 . 0 7 BaTiO3 by mixing solid oxide solutions. The crystalline properties of the X-ray diffraction and ferroelectric properties were studied from the P - E loop. The physical properties showed that BSNT-BT ceramic density increased and the percentage of shrinkage decreased due to the increase of the amount of Sm2O3. Moreover it was found that the results were consistent with the structural study for sintered samples at a temperature of 950 °C for 7 hours. It can be determined that the BSNT-BT ceramics have a perovskite structure which is like the main structure of ceramic type BNT. Dielectric properties and dielectric losses at room temperature showed that when increasing the amount of Sm2O3 in BSNT-BT ceramics the dielectric and low dielectric loss were consistent with reduced material resistance. Further the ferroelectric test found that BSNT-BT ceramics improved the ferroelectric properties when increasing the amount of Sm2O3 in the BSNT-BT ceramics.
การบำบัดน้ำเสียจากสีย้อมผ้าด้วยกระบวนการโอโซนเนชัน โดยใช้ตัวกลางพลาสติก เคลือบผิวไทเทเนียมไดออกไซด์ชนิดรูไทล์เป็นตัวเร่งปฏิกิริยา
This research is to study the efficiency of treating wastewater from dyeing fabric by the ozonation process. By using rutile TiO2 coated plastic media to catalyze. Which uses O3 generators with a capacity of 2.62 - 3.10 g/hr. By studying the factors that affect the treatment efficiency of COD and color such as the pH of the water used in the treatment at pH 3 pH 7 and pH 11 the initial COD concentration of 100% 50% and 25% which have values in the range of 100 -320 mg/L. O3 exposure time 120 min. From the study it is found that the efficiency of reducing the impurities in wastewater by the ozonation process in the pH 11 state the COD concentration at 50% can reduce the COD. And the maximum color is at 33.3% and 90% from the 550 ADMI color intensity with a COD of 180 mg/L. For the study of the efficiency of reducing the impurities of wastewater by ozonation process together with 2 g. of TiO2/1 L. of wastewater in the condition of pH 11 concentration COD Beginning at 100% with the ability to reduce COD values And the maximum color is at 40% and 80% of the 270 ADMI color intensity with a COD of 190 mg/L. The amount of O3 suitable for treatment has an average value of 0.0374 g/min./10.5 L. of wastewater. The duration of O3 exposure in both processes has a similar approach to the efficiency of COD and color treatment when increasing the duration of O3 exposure.
การพัฒนาสื่อการสอนวิชาดาราศาสตร์ โดยการประยุกต์ใช้เทคโนโลยีความจริงเสริม
At present augmented reality (AR) technology has an essential role in peoples daily life. It has widely established in medicine commerce education just to name a few. This work presents the development of educational media in astronomy using augmented reality (AR) technology via website. It supports an inquiry-based learning (IBL) which is the one of pedagogy approaches for the 21st century education. Applying AR in educational media creating a 3D astronomy environment in the topic of solar systems making learners more motivated and eager in astronomy inquiry in order to construct scientific knowledge. Furthermore a post-test is conducted to observe the learning outcome from the educational media. To evaluate the development of educational media in astronomy using augmented reality (AR) technology the results showed the overall average satisfaction score of the system was 4.63 with a very satisfied level. Moreover it performs properly according to its mentioned objectives.