scholarly journals EVALUASI CRITICAL PARAMETER KOMPRESOR MULTISTAGE UNTUK MENINGKATKAN PRODUKSI MIGAS SALAH SATU ANJUNGAN OFFSHORE DI KALIMANTAN TIMUR

2019 ◽  
pp. 10-14
Keyword(s):  
Regression Analysis ◽  
Analysis Of Variance ◽  
Critical Parameter ◽  
Suction Pressure ◽  
Discharge Temperature ◽  
Pressure Discharge ◽  
Main Effect ◽  
Discharge Pressure ◽  
Pressure Suction ◽  
Suction Flow

Penelitian ini memperkenalkan metode pendekatan statistik untuk mengetahui parameter-parameter yang berpengaruh signifikan terhadap kinerja kompresor multistage dalam berbagai kondisi operasi yang mempengaruhi proses produksi minyak dan gas . Korelasi empiris memberikan pendekatan baru untuk mengetahui parameter kritikal dalam kompresor dan kemampuan prediksi terhadap peningkatan produksi. Metode ini telah diterapkan di kompresor multistage di salah satu Anjungan Offshore di Wilayah Kalimantan Timur. Parameter-parameter yang di analisis pada kompresor multistage ( C301 A/B, C302 A/C dan C303 A/B) antara lain Suction Pressure, Suction Temperature, Discharge Pressure, Discharge Temperature, Suction Flow, Suction Temperature, Speed NGP dan Speed NPT . Metode statistik yang digunakan antara lain Regression Analysis, Analysis of Variance (ANOVA) dan Main Effect Plot (MEP) dengan menggunakan software MINITAB. Hasil analisis menunjukkan parameter yang berpengaruh signifikan di kompresor C301 A/B adalah suction pressure dan speed, sedangkan untuk kompresor C302 A/C parameter yang berpengaruh signifikan adalah suction pressure, discharge pressure dan suction flow. Hasil berbeda ditunjukkan oleh kompresor C303 A/B dimana hanya discharge pressure yang berpengaruh signifikan. Hasil analisis ini juga mampu mengevaluasi serta memprediksi model optimum dari korelasi dan kombinasi parameter-parameter yang signifikan tersebut sehingga bisa gunakan sebagai acuan untuk melakukan optimasi setting parameter di proses produksi sehingga meningkatkan produksi dari sumur.

scholarly journals ANALISA PERFORMANCE POMPA SENTRIFUGAL DI UNIT 2 PT. PUPUK KALIMANTAN TIMUR

2021 ◽  
Vol 8 (1) ◽  
pp. 30
Author(s):  
Rachmat Subagyo ◽  
Bagaskoro Rizqining Hendratno
Keyword(s):  
Suction Pressure ◽  
Pressure Discharge ◽  
Discharge Pressure

Penelitian ini bertujuan untuk mengetahui unjuk kerja pompa sentrifugal. Data-data yang diperlukan dalam riset ini diperoleh dari data commissioning dan data aktual pompa sentrifugal Lean Benfield Solution. Adapun data yang dibutuhkan meliputi: kecepatan (RPM), Kapasitas (Q), Head (H), Axle Power (BHP), Hydrolysis Power (WHP), Suction Pressure, Discharge Pressure, rasio Discharge Pressure dan Efficiency (ɳ). Hasil analisis perhitungan pada minggu pertama diperoleh data-data sebagai berikut: ∆P= 34,8 kg / cm2, Head (H)= 274m, Hydrolysis Power (WHP)= 84kW, Axle Power (BHP)= 116kW, Efisiensi pompa= 72%, begitu juga minggu kedua hingga minggu kedelapan. Kemudian hasil data aktual yang diperoleh dibandingkan dengan data komisioning. Hasil analisis data pada penelitian ini menunjukkan tidak ada data yang melebihi data komisioning. Data aktual tertinggi dicapai pada minggu ke delapan dengan nilai sebagai berikut: ∆P sebesar= 36kg/cm2, Head (H)= 283m, Hydrolysis Power (WHP)= 104kW, Axle Power (BHP)= 141kW dan Efisiensi= 74,8%.

Study on Sputtering Characteristics of Ni80Cr20 Alloy Target

2007 ◽  
Vol 353-358 ◽  
pp. 1891-1894
Author(s):  
Zhi Yong He ◽  
Xiao Feng Wang ◽  
Ying Fan ◽  
Zhen Xia Wang ◽  
Xiao Ping Liu ◽  
...  
Keyword(s):  
Regression Analysis ◽  
Glow Discharge ◽  
Processing Parameters ◽  
Orthogonal Test ◽  
Real Output ◽  
Target Temperature ◽  
Alloy Target ◽  
Discharge Parameters ◽  
Sputtering Yield ◽  
Discharge Pressure

Sputtering rate Sr was proposed as an alternative parameter instead of sputtering yield Y to calibrate the sputtering ability of the target, defined as the mass loss of the target per unit time and sputtering current. The approach is more reliable for glow discharge processes since the intense backscattering effect was taken into consideration. The effects of processing parameters on Sr were investigated through orthogonal test, the results indicated that target temperature affects Sr obviously, and among the discharge parameters, the target voltage and discharge pressure were the governing factors. Through regression analysis, the sputtering rate Sr was expressed as a function of sputtering voltage and discharge pressure which could be used to evaluate or predict the real output of the sputtering target.

Nine, Seven, Five, or Three: How Many Figures Do We Need for Assessing Body Image?

2005 ◽  
Vol 100 (2) ◽  
pp. 488-492 ◽  
Author(s):  
Neala Ambrosi-Randić ◽  
Alessandra Pokrajac-Bulian ◽  
Vladimir Takšić
Keyword(s):  
Body Image ◽  
Analysis Of Variance ◽  
Optimal Number ◽  
Female Students ◽  
Validity And Reliability ◽  
Main Effect ◽  
Dependent Variables ◽  
Post Hoc ◽  
Main Effects

320 Croatian female students ( M = 20.4 yr.) were recruited to examine the validity and reliability of figural scales using different numbers of stimuli (3, 5, 7, and 9) and different serial presentation (serial and nonserial order). A two-way analysis of variance (4 numbers × 2 orders of stimuli) was performed on ratings of current self-size and ideal size as dependent variables. Analysis indicated a significant main effect of number of stimuli. This, together with post hoc tests indicated that ratings were significantly different for a scale of three figures from scales of more figures, which in turn did not differ among themselves. Main effects of order of stimuli, as well as the interaction, were not significant. The results support the hypothesis that the optimal number of figures on a scale is seven plus (or minus) two.

DEVELOPMENT OF REGIONAL MODELS OF CREATIVE INDUSTRIES ON THE BASIS OF CORRELATION-REGRESSION ANALYSIS

2021 ◽  
Vol 9 (1) ◽  
pp. 27-34
Author(s):  
Maksym Voichuk ◽  
Yuliia Zavadska
Keyword(s):  
Regression Analysis ◽  
Analysis Of Variance ◽  
Integrated Assessment ◽  
Correlation Coefficients ◽  
Regional Model ◽  
Creative Industries ◽  
Regional Models ◽  
Multiple Correlation ◽  
Economic Mechanisms ◽  
Paired Correlation

The article considers the importance of research and functioning of creative industries and substantiates the stages of integrated assessment of their development. One of the methodologi-cal approaches to the study of creative industries is considered namely correlation-regression analysis. The necessity of application of multiple correlation-regression analysis for estimation of the interdependence of certain creative indicators with their creative parameters is opened and the regional model of development of creative industries is constructed. The study is based on calculations and formulas, the values of which are used in the construction of a matrix of paired correlation coefficients and other important components. Based on the study, regression statistics and analysis of variance. The paper provides all possible indicators for the develop-ment of an organizational and economic mechanisms for building regional models of creative industries.

Psychophysiological Comparison of Self-Efficacy and Resting Heart Rate

2002 ◽  
Vol 94 (3) ◽  
pp. 720-722
Author(s):  
Matthew S. Wiggins
Keyword(s):  
Heart Rate ◽  
Analysis Of Variance ◽  
Self Efficacy ◽  
Exercise Program ◽  
Resting Heart Rate ◽  
Heart Rates ◽  
Fitness Center ◽  
Significant Difference ◽  
Main Effect ◽  
Individual Self

This study was used to assess the premise that lower resting heart rates should be associated with higher scores on self-efficacy for exercisers. A total of 64 participants, 29 men and 35 women ranging in age from 18 to 38 years old ( M = 23.22, SD = 4.19), currently participating in an exercise program at a fitness center, were assessed using the Exercise Specific Self-efficacy Scale to measure general individual self-efficacy, along with obtaining resting heart rates. Participants were separated into three different groups based on individual resting heart-rate values. Results for a 2 (sex) by 3 (heart rate) two-way analysis of variance indicated a significant difference in self-efficacy scores ( F2.58 = 3.24, p<.05) among the three groups. No interaction or main effect for sex was found.

Effects of Prior Use of Chopsticks on Two Different Types of Dexterity Tests: Moving Beans Test and Purdue Pegboard

2009 ◽  
Vol 108 (2) ◽  
pp. 392-398 ◽  
Author(s):  
Sohee Shin ◽  
Shinichi Demura ◽  
Hiroki Aoki
Keyword(s):  
Nervous System ◽  
Analysis Of Variance ◽  
Daily Life ◽  
Practice Effects ◽  
Dominant Hand ◽  
Finger Dexterity ◽  
Significant Difference ◽  
Main Effect ◽  
Prior Use ◽  
Different Types

The Purdue Pegboard and Moving Beans with Tweezers test have been used in the rehabilitation of persons with nervous system disorders; however, these two tests differ in their methodology. In the latter test, the testee picks up items with chopsticks or tweezers, but in the former test, the testee grasps items directly with the fingers of one hand. Use experience of a tool may strongly influence performance. The present study examined the use of chopsticks in daily life on performance of the two tests of finger dexterity by two groups of 20 youths who habitually used chopsticks to eat and 20 who did not. Three 30-sec. trials with the dominant and nondominant hands were given. Analysis of variance gave a main effect for number of beans moved between the two groups, hand (nondominant vs dominant), and trials. Significantly more beans were moved by the group with prior chopsticks use than the nonusers by the dominant hand than the nondominant hand, and on Trials 2 and 3 than Trial 1. For the Purdue Pegboard, the only significant difference for trials showed fewer pegs moved on Trial 1 than Trial 3. In conclusion, the groups who habitually used chopsticks performed better on the Moving Beans with Tweezers test than the group without such experience. Also, the marked laterality and practice effects for chopstick users was not observed on the Purdue Pegboard.

Gadolinium and mechanotransduction of rat aortic baroreceptors

1992 ◽  
Vol 262 (5) ◽  
pp. H1415-H1421 ◽  
Author(s):  
M. C. Andresen ◽  
M. Yang
Keyword(s):  
Ion Channels ◽  
Direct Effects ◽  
Cellular Mechanisms ◽  
Pressure Discharge ◽  
Ethanesulfonic Acid ◽  
Discharge Pressure ◽  
Aortic Baroreceptors ◽  
Stretch Activated Channels ◽  
Stretch Activated Ion Channels

The cellular mechanisms enabling baroreceptors to transduce wall distortion into axonal discharge are unknown but might involve stretch-activated ion channels. Gadolinium (Gd3+, 10 microM) blocks stretch-activated channels in several preparations. Here we tested Gd3+ effects on discharge responses of 15 single-fiber baroreceptors in vitro. We simultaneously measured discharge, pressure, and aortic diameter at Gd3+ concentrations from 0.001 to 400 microM. High levels of Gd3+ added to a bicarbonate-buffered perfusate (Krebs) slightly shifted the pressure-discharge relation (less than 4 mmHg, n = 3, P = 0.01) without affecting slope or discharge frequency at threshold. Gd3+ in Krebs variably altered the pressure-diameter relation. Because 500 microM Gd3+ produced visible precipitate in Krebs, we tested Gd3+ in a simpler perfusate using N-2-hydroxyethylpiperazine-N'-2-ethanesulfonic acid (HEPES). Gd3+ in HEPES (n = 10) induced minor, but statistically significant, average increases in threshold (less than +5-7%) and no changes in gain. However, prolonged HEPES exposure alone (n = 2) produced similar shifts. Electron microscopy verified that Gd3+ diffused from the lumen to reach extracellular locations near baroreceptor endings. We conclude that 1) HEPES perfusate alone reversibly depresses baroreceptor discharge and 2) Gd3+ has no direct effects on baroreceptors. Thus it appears that aortic baroreceptor mechanotransduction must utilize a different class of stretch-activated ion channels.

scholarly journals Differences in the Magnitude of Representational Momentum Between School-Aged Children and Adults as a Function of Experimental Task

i-Perception ◽  
2018 ◽  
Vol 9 (4) ◽  
pp. 204166951879119 ◽  
Author(s):  
Nobu Shirai ◽  
Erika Izumi ◽  
Tomoko Imura ◽  
Masami Ishihara ◽  
Kuniyasu Imanaka
Keyword(s):  
Analysis Of Variance ◽  
Age Groups ◽  
Representational Momentum ◽  
Age Difference ◽  
School Aged Children ◽  
Computer Mouse ◽  
Main Effect ◽  
Pointing Task ◽  
Moving Stimulus ◽  
Post Hoc

Representational momentum (RM) is the phenomenon that occurs when an object moves and then disappears, and the recalled final position of the object shifts in the direction of its motion. Some previous findings indicate that the magnitude of RM in early childhood is comparable to that in adulthood, whereas other findings suggest that the magnitude of RM is significantly greater in childhood than in adulthood. We examined whether the inconsistencies between previous studies could be explained by differences in the experimental tasks used in these studies. Futterweit and Beilin used a same-different judgment between the position where a moving stimulus disappeared and where a comparison stimulus reappeared (judging task), whereas Hubbard et al. used a task wherein a computer mouse cursor pointed to the position where the moving stimulus disappeared (pointing task). Three age groups ( M = 7.4, 10.7, and 22.1 years, respectively) participated in both the judging and pointing tasks in the current study. A multivariate analysis of variance with the magnitudes of RM in each task as dependent variables revealed a significant main effect for age. A one-way analysis of variance performed for each of the judging and pointing tasks also indicated a significant main effect of age. However, post hoc multiple comparisons detected a significant age effect only for the pointing task. The inconsistency between the judging and pointing tasks was discussed related to the distinct effect size of the age difference in the magnitude of RM between the two tasks.

Sign in / Sign up

Export Citation Format

Share Document