Petra Christian University

About: Petra Christian University is a education organization based out in Surabaya, Indonesia. It is known for research contribution in the topics: Population & Customer satisfaction. The organization has 2412 authors who have published 2893 publications receiving 10429 citations.

Analisis konservasi energi melalui selubung bangunan

Abstract: Ventilating and Air Conditioning system consumes 50-70% of the total energy used in an office building. The cooling load of a building consists of internal cooling load, i.e. loads produce by light, occupants, and heat generating power/appliances; and external cooling load, i.e. loads produce by radiation, conduction, and ventilation/infiltration through building envelope. To reduce the external cooling load, SNI 03-6389-2000 specifies that the Overall Thermal Transfer Value (OTTV) should be less than or equal to 45 Watt/m². This research supports energy conservation in finding the optimum building envelope design by specifying the Window to Wall Ratio (WWR) which will fulfill the OTTV requirement. Five office buildings in Jakarta, eight story and above are used in this study. The result shows that WWR less than or equal to 0.40 will produce OTTV value that suits the SNI 03-6389-2000 requirement. It is also shown that OTTV value is not the only factor that guarantees energy conservation. Abstract in Bahasa Indonesia : Sistem tata udara menggunakan 50-70% energi dari keseluruhan energi listrik yang digunakan dalam sebuah bangunan gedung perkantoran. Beban pendinginan dari suatu bangunan gedung terdiri dari beban internal, yaitu beban yang ditimbulkan oleh lampu, penghuni serta peralatan lain yang menimbulkan panas dan beban external yaitu panas yang masuk dalam bangunan diakibatkan oleh radiasi matahari, konduksi dan ventilasi/infiltrasi melalui selubung bangunan. Untuk mengurangi beban external, SNI 03-6389-2000 menentukan kriteria disain yaitu Overall Thermal Transfer Value (OTTV) harus lebih kecil atau sama dengan 45 Watt/m². Untuk mempermudah perencanaan untuk mendukung upaya konservasi energi penelitian ini berusaha mencari Window to Wall Ratio (WWR) yang dapat memenuhi OTTV yang disyaratkan. Studi dilakukan pada lima gedung perkantoran di Jakarta, yang memiliki ketinggian lebih dari delapan lantai. Hasil penelitian ini menunjukkan WWR lebih kecil atau sama dengan 0,40 menghasilkan nilai OTTV memenuhi syarat yang ditentukan oleh SNI 03-6389-2000. Ditunjukkan pula bahwa nilai OTTV bukan satu-satunya batasan yang menjamin gedung hemat energi

Analysis of the Effect of Business Strategy and Financial Distress on Tax Avoidance

Abstract: In recent years, tax avoidance has been frequently discussed and has attracted the attention of the Indonesian government. Many factors affect tax avoidance, one of it is business strategy. Not only business strategies, but also financial distress can also be one of the factors causing tax avoidance. Related to the problem, in this study we would examine the impact of business strategies and financial distress of Indonesian companies to tax avoidance practices. The samples of this research were 292 companies in the manufacturing, trade and construction sectors which were listed on the Indonesia Stock Exchange in period 2015-2018 and obtained 1168 research data. This research used multiple linear regression method. Our regression results proved that the prospector business strategy has a positive impact on tax avoidance, while the defender's business strategy has a negative impact on tax avoidance. Meanwhile, related to financial distress, our results showed that financial distress has a positive impact on tax avoidance.

The Effect of Ergonomic Aspects on Customers’ Convenience at Restaurant in Surabaya

Abstract: This research aims to reveal whether ergonomic aspects possess any influence toward restaurant customers’ convenience. These ergonomic aspects comprise visual display, anthropometric, and environme...

Power Flow in A Load-Current Sensorless Shunt Active Power Filter

Abstract: In this paper, power flow analysis of a three-phase four-wire system with a shunt active power filter in steady state is presented. The analysis begins with a mathematical model of the power inverter and continues to find the relationship of the real and imaginary power as well as zero sequence power in the grid, loads, and the inverter (AC and DC sides) for successful compensation. The system includes mixed non-linear loads with significant unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with a filter inductance at the AC output and a DC-bus capacitor. The CC-VSI is operated to directly control the AC grid current to be sinusoidal and in phase with the grid voltage. Computer simulation results verify the concept of the filter and the power flow. Abstract in Bahasa Indonesia : Dalam makala ini disajikan analisa aliran daya dari sistem tiga-fasa empat-kawat dengan sebuah shunt active power filter dalam keadaan ajek. Analisa dimulai dengan model matematika dari power inverter dan dilanjutkan dengan mencari hubungan antara daya nyata, imajiner, dan urutan nol pada sumber, beban, dan inverter (sisi AC dan DC) untuk proses kompensasi yang berhasil. Dalam sistem ini terdapat bermacam beban tidak linier yang juga tidak seimbang. Sedangkan filternya terdiri dari current-controlled voltage source inverter (CC-VSI) tiga fasa yang dilengkapi dengan induktansi filter pada keluaran AC dan kapasitor DC-bus. CC-VSI beroperasi untuk mengendalikan arus sumber AC secara langsung agar menjadi sinus dan sefasa dengan tegangan sumber. Hasil simulasi komputer bersesuaian dengan konsep dari filter dan aliran daya. Kata kunci:active power filter, aliran daya

Analisis tingkat brand loyalty pada produk shampoo merek “head & shoulders”

Abstract: This research is to know level of brand loyalty of shampoo Head & Shoulders and pyramid of brand loyalty, which consist of switcher buyer, habitual buyer, satisfied buyer, liking of the brand, and committed buyer of shampoo Head & Shoulders Result of this research up on 1200 respondents indicate that: (1) Shampoo Head & Shoulders have consumer which at most at committed buyer, that is 9125%, so that concluded nicely (2) Percentage of switcher buyer, habitual buyer, satisfied buyer, liking of the brand, and committed buyer of shampoo Head & Shoulders successively is 1850%, 4208%, 7967%, 8660%, and 9125%, so that pyramid of brand loyalty is like inversed pyramid This matter indication that brand of Head & Shoulders have strong brand equity Abstract in Bahasa Indonesia: Penelitian ini bertujuan untuk mengetahui tingkat brand loyalty konsumen atas shampoo merek Head & Shoulders dan mengetahui susunan piramida loyalitas, yang meliputi switcher, habitual buyer, satisfied buyer, liking of the brand, dan committed buyer atas shampoo merek Head & Shoulders Hasil penelitian atas 1200 orang pelanggan menunjukkan bahwa: (1) Shampoo merek Head & Shoulders mempunyai konsumen yang paling banyak pada tingkat committed buyer, yaitu 91,25%, sehingga disimpulkan bagus (2) Prosentase switcher buyer, habitual buyer, satisfied buyer, liking of the brand, dan committed buyer atas shampoo merek Head & Shoulders berturut-turut adalah 18,50%, 42,08%, 79,67%, 86,60%, dan 91,25%, sehingga susunan piramida loyalitas adalah seperti piramida terbalik Hal ini mengindikasikan bahwa merek Head & Shoulders memiliki brand equity yang kuat Kata kunci: brand loyalty, switcher, habitual buyer, satisfied buyer, liking of the brand, committed buyer