In this research we will study an algebraic structure d-algebras. Then we establish an algorithm to check any sets in d-algebras if they are ideals or T-fuzzy d-ideals. Moreover we investigate some related properties in d-algebras.

This research aimed to study students opinions towards the Cheer and Admission Conference and present a creative recruitment model for students of the Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon. The sample group was undergraduate students of The Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon with 376 students studying in 2019. The data collection tools were questionnaires of students opinions on the activities. Cronbachs alpha coefficient was used to examine the whole questionnaires reliability yielding a value of 0.83. A statistical package for analyzing data collected from January to February 2020 was used with the statistics mean standard deviation t-test and one-way analysis of variance (ANOVA). The research results found that: 1. The Pros and Cons of students’ opinions on the freshman orientation activities and cheer meetings were that freshmen get to know friends and seniors; freshmen are afraid of juniors and seniors. 2. Male and female students had different opinions about organizing activities for freshman recruiting and cheered meeting. 3. Students studying in different disciplines had no different opinions on organizing new freshman activities and cheer meeting. 4. Students studying in different year levels had the same opinion on organizing new recruiting activities and cheer meeting. 5. Features of the creative recruiting activities format are as follows: 5.1 It is an activity that gives importance to safety and respect for personal freedom. 5.2 It is the responsibility of the Faculty to closely watch this field of study 5.3 It is an activity that promotes pride in being a student at the university. 5.4 It is an activity that helps students to adjust to university life and aims to foster a good relationship between students seniors and juniors. 5.5 An outside activity must be an event organized by a faculty or university department only.

In this research we will study an algebraic structure pseudo d-algebras. Then we give some more properties for pseudo d-ideal that can construct a quotient pseudo d-algebras. Moreover we show that the quotient pseudo d-algebras is a pseudo d-algebras.

The conductor of an order is the largest ideal of the ring of integers of a field which is contained in the order. In this paper we characterize conductors in quartic number fields whose norm is a power of unramified prime.

In this research we introduce the notions of fuzzy d-subalgebra and fuzzy d-ideal of a d-algebra with respect to a triangular norm. Then we investigate some related properties