Judul: Influences of work values on environment at the airport: a case study in five airports in Indonesia
Abstrak: This study was conducted at five airports managed by PT Angkasa Pura I, as follows: Juanda Airport, Surabaya; Hasanuddin Airport, Makassar; Pattimura airport, Ambon; Ngurah Rai Airport, Denpasar; and Sepinggan Airport, Balikpapan. This study aims to identify the value that affect the working conditions of the airport environment, analyzing the influence of each work's value to the quality of the airport environment, identify the needs of stakeholders in improving the performance of airports in the future and formulate implementation strategy needs to be done to improve the environmental performance of the airports. The results of the analysis of stakeholder needs against environmental quality inside and outside the company show that the requirement is: (1) improving the performance of efficient service, clear, precise, and easy airport service users; (2) increase the professionalism of officers who work efficiently, workers spread across several important points, and create familiarity between officers with airport service users, as well as the atmosphere of a friendly waitress from officers; (3) dissemination of clear and strict rules for employees and users services and for law enforcement officers and service users; and (4) improvement of facilities. The results of a prospective analysis found five key factors, namely leadership, cleanliness, care customs, modesty, and tidiness. Based on these five key factors, then the implementation strategy that can be done by PT Angkasa Pura I to improve the quality of the firm is: (1) working with the leadership; (2) always pay attention to neatness, both in appearance and in work; (3) always pay attention to cleanliness; (4) be simple, reasonable, not excessive in employment; and (5) caring for customs or the culture around an enterprise environment.
Keyword: environment, PT Angkasa Pura I, work values, Indonesia

Judul: Analisis Ekonomi Lingkungan Bandar Udara Soekarno Hatta
Abstrak: Airport management needs to take a good look at some aspects such as security, airplane safety, space planning, local economy growth, and environmental sustainability. One of the ways to taking environment into account is by building an eco-friendly airport. Eco-friendly airport plays an important role for environmental sustainability, however it is still need to know the preference of customer on the willingness to pay for the implementation of eco-friendly airport on Soekarno Hatta Airport. This research is conducted to identify the current condition of airport related with the concept of eco-friendly airport estimate, the customers willingness to pay, and analyze the factors which determines said willingness to pay. Every activity in the airport has their own facility and utility to support a comfortable and safe service. However, the majority of respondents feel that Soekarno Hatta Airport still lack in some aspects, such as comfort, aesthetic, hygiene, and noise control. Research shown among 97 respondents, the average willingness to pay is IDR 13.865,98 per person per flight. Education level, income level, flight frequency, and comfort dummy, are define at 10% significance on the value of willingness to pay
Keyword: willingness to pay, eco-airport, airport

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh.
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. ,,,
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular.