**Commenced**in January 2007

**Frequency:**Monthly

**Edition:**International

**Paper Count:**1538

# Search results for: Derating Factor

##### 1538 Effect of Derating Factors on Photovoltaics under Climatic Conditions of Istanbul

**Authors:**
Bihter Yerli,
Mustafa K. Kaymak,
Ercan İzgi,
Ahmet Öztopal,
Ahmet D. Şahin

**Abstract:**

**Keywords:**
Efficiency,
Derating Factor,
Istanbul,
Photovoltaic.

##### 1537 A Sufficient Condition for Graphs to Have Hamiltonian [a, b]-Factors

**Authors:**
Sizhong Zhou

**Abstract:**

Let a and b be nonnegative integers with 2 ≤ a < b, and let G be a Hamiltonian graph of order n with n ≥ (a+b−4)(a+b−2) b−2 . An [a, b]-factor F of G is called a Hamiltonian [a, b]-factor if F contains a Hamiltonian cycle. In this paper, it is proved that G has a Hamiltonian [a, b]-factor if |NG(X)| > (a−1)n+|X|−1 a+b−3 for every nonempty independent subset X of V (G) and δ(G) > (a−1)n+a+b−4 a+b−3 .

**Keywords:**
graph,
minimum degree,
neighborhood,
[a,
b]-factor,
Hamiltonian [a,
b]-factor.

##### 1536 Hamiltonian Factors in Hamiltonian Graphs

**Authors:**
Sizhong Zhou,
Bingyuan Pu

**Abstract:**

**Keywords:**
graph,
neighborhood,
factor,
Hamiltonian factor.

##### 1535 Constructing an Attitude Scale: Attitudes toward Violence on Televisions

**Authors:**
Göksu Gözen Citak

**Abstract:**

**Keywords:**
Attitudes toward violence,
confirmatory factor analysis,
constructing attitude scale,
exploratory factor analysis,
violence on televisions.

##### 1534 Analysis and Measuring Surface Roughness of Nonwovens Using Machine Vision Method

**Authors:**
Dariush Semnani,
Javad Yekrang,
Hossein Ghayoor

**Abstract:**

**Keywords:**
Surface roughness,
Nonwoven,
Machine vision,
Image processing.

##### 1533 A Review on Bearing Capacity Factor Nγ of Shallow Foundations with Different Shapes

**Authors:**
S. Taghvamanesh,
R. Ziaie Moayed

**Abstract:**

There are several methods for calculating the bearing capacity factors of foundations and retaining walls. In this paper, the bearing capacity factor Nγ (shape factor) for different types of foundation have been investigated. The formula for bearing capacity on c–φ–γ soil can still be expressed by Terzaghi’s equation except that the bearing capacity factor Nγ depends on the surcharge ratio, and friction angle φ. It is apparent that the value of Nγ increases irregularly with the friction angle of the subsoil, which leads to an excessive increment in Nγ of foundations with larger width. Also, the bearing capacity factor Nγ will significantly decrease with an increase in foundation`s width. It also should be highlighted that the effect of shape and dimension will be less noticeable with a decrease in the relative density of the soil. Hence, the bearing capacity factor Nγ relatively depends on foundation`s width, surcharge and roughness ratio. This paper presents the results of various studies conducted on the bearing capacity factor Nγ of: different types of shallow foundation and foundations with irregular geometry (ring footing, triangular footing, shell foundations and etc.) Further studies on the effect of bearing capacity factor Nγ on mat foundations and the characteristics of this factor with or without consideration for the presence of friction between soil and foundation are recommended.

**Keywords:**
Bearing capacity,
Bearing capacity factor,
irregular foundation,
shallow foundation.

##### 1532 Energy Efficiency Testing of Fluorescent and WOLED (White Organic LED)

**Authors:**
Hari Maghfiroh,
Harry Prabowo

**Abstract:**

WOLED is widely used as lighting for high efficacy and little power consumption. In this research, power factor testing between WOLED and fluorescent lamp to see which one is more efficient in consuming energy. Since both lamps use semiconductor components, so calculation of the power factor need to consider the effects of harmonics. Harmonic make bigger losses. The study is conducted by comparing the value of the power factor regardless of harmonics (DPF) and also by included the harmonics (TPF). The average value of DPF of fluorescent is 0.953 while WOLED is 0.972. The average value of TPF of fluorescent is 0.717 whereas WOLED is 0.933. So from the review of power factor WOLED is more energy efficient than fluorescent lamp.

**Keywords:**
Fluorescent,
harmonic,
power factor,
WOLED.

##### 1531 The Wijma Delivery Expectancy/Experience Questionnaire (W-DEQ) with Turkish Sample: Confirmatory and Exploratory Factor Analysis

**Authors:**
Oznur Korukcu,
Kamile Kukulu,
Mehmet Z. Firat

**Abstract:**

The propose of this study is to investigate the factor structures of the W-DEQ, originally developed on UK and Swedish women, were confirmed in Turkish samples, and to obtain a new modified factor structure appropriate to Turkish culture. Statistical analyses of the data obtained were performed using SPSS© for Windows version 13.0 and the SAS statistical software Version 9.1. Both confirmatory and exploratory factor analysis of W-DEQ were performed in the study. Factor analysis yielded four factors related to hope, fear, lack of positive anticipation and riskiness. The alpha estimates of the total W-DEQ score were somewhat higher, being 0.92 for the parous and 0.90 for the nulliparous sample. These are well above the accepted limit of 0.70 and indicate excellent levels of internal reliability, thus showing that the questions were appropriate to the Turkish culture and useful scale for the evaluation of fear of childbirth in Turkish pregnants.

**Keywords:**
Confirmatory factor analysis,
cross-cultural research,
exploratory factor analysis,
fear of childbirth.

##### 1530 Evaluation of Behavior Factor for Steel Moment-Resisting Frames

**Authors:**
Taïeb Branci,
Djamal Yahmi,
Abdelhamid Bouchair,
Eric Fourneley

**Abstract:**

According to current seismic codes the structures are calculated using the capacity design procedure based on the concept of shear at the base depending on several parameters including behavior factor which is considered to be the most important parameter. The behavior factor allows designing the structure when it is at its ultimate limit state taking into account its energy dissipation through its plastic deformation. The aim of the present study is to assess the basic parameters on which is composed the behavior factor among them the reduction factor due to ductility, and those due to redundancy and the overstrength for steel moment-resisting frames of different heights and regular configuration. Analyses are conducted on these frames using the nonlinear static method where the effect of some parameters on the behavior factor, such as the number of stories and the number of spans, are taken into account. The results show that the behavior factor is rather sensitive to the variation of the number of stories and bays.

**Keywords:**
Behavior,
code,
frame,
ductility,
overstrength,
redundancy,
plastic.

##### 1529 A Neighborhood Condition for Fractional k-deleted Graphs

**Authors:**
Sizhong Zhou,
Hongxia Liu

**Abstract:**

Abstract–Let k ≥ 3 be an integer, and let G be a graph of order n with n ≥ 9k +3- 42(k - 1)2 + 2. Then a spanning subgraph F of G is called a k-factor if dF (x) = k for each x ∈ V (G). A fractional k-factor is a way of assigning weights to the edges of a graph G (with all weights between 0 and 1) such that for each vertex the sum of the weights of the edges incident with that vertex is k. A graph G is a fractional k-deleted graph if there exists a fractional k-factor after deleting any edge of G. In this paper, it is proved that G is a fractional k-deleted graph if G satisfies δ(G) ≥ k + 1 and |NG(x) ∪ NG(y)| ≥ 1 2 (n + k - 2) for each pair of nonadjacent vertices x, y of G.

**Keywords:**
Graph,
minimum degree,
neighborhood union,
fractional k-factor,
fractional k-deleted graph.

##### 1528 Cognitive Weighted Polymorphism Factor: A Comprehension Augmented Complexity Metric

**Authors:**
T. Francis Thamburaj,
A. Aloysius

**Abstract:**

**Keywords:**
Cognitive complexity metric,
cognitive weighted
polymorphism factor,
object-oriented metrics,
polymorphism factor,
software metrics.

##### 1527 A High Quality Factor Filter Based on Quasi-Periodic Photonic Structure

**Authors:**
Hamed Alipour-Banaei,
Farhad Mehdizadeh

**Abstract:**

**Keywords:**
Thue-Morse,
filter,
quality factor.

##### 1526 Affine Projection Algorithm with Variable Data-Reuse Factor

**Authors:**
ChangWoo Lee,
Young Kow Lee,
Sung Jun Ban,
SungHoo Choi,
Sang Woo Kim

**Abstract:**

This paper suggests a new Affine Projection (AP) algorithm with variable data-reuse factor using the condition number as a decision factor. To reduce computational burden, we adopt a recently reported technique which estimates the condition number of an input data matrix. Several simulations show that the new algorithm has better performance than that of the conventional AP algorithm.

**Keywords:**
Affine projection algorithm,
variable data-reuse factor,
condition number,
convergence rate,
misalignment.

##### 1525 Establishing a New Simple Formula for Buckling Length Factor (K) of Rigid Frames Columns

**Authors:**
Ehab Hasan Ahmed Hasan Ali

**Abstract:**

**Keywords:**
Buckling length,
New formula,
Curve fitting,
Simplification,
Steel column design.

##### 1524 Electron Filling Factor and Sunlight Concentration Effects on the Efficiency of Intermediate Band Solar Cell

**Authors:**
Nima Es'haghi Gorji,
Hossein Movla,
Foozieh Sohrabi,
Alireza Mottaghizadeh,
Mohammad Houshmand,
Hassan Babaei,
Arash Nikniazi

**Abstract:**

For a determined intermediate band position, the effects of electron filling factor and sunlight concentration on the active region thickness and efficiency of the quantum-dot intermediate band solar cell are calculated. For each value of electron filling factor, the maximum point of efficiency obtained and resulted in the optimum thickness of the cell under three different sunlight concentrations. We show the importance of filling factor as a parameter to be more considered. The photon recycling effect eliminated in all calculations.

**Keywords:**
Intermediate band,
Sunlight concentration,
Efficiency limits,
Electron filling factor

##### 1523 Forecasting Electricity Spot Price with Generalized Long Memory Modeling: Wavelet and Neural Network

**Authors:**
Souhir Ben Amor,
Heni Boubaker,
Lotfi Belkacem

**Abstract:**

**Keywords:**
k-factor,
GARMA,
LLWNN,
G-GARCH,
electricity price,
forecasting.

##### 1522 Mind Your Product-Market Strategy on Selecting Marketing Inputs: An Uncertainty Approach in Indian Context

**Authors:**
Susmita Ghosh,
Bhaskar Bhowmick

**Abstract:**

**Keywords:**
Uncertainty,
market,
orientation,
competitor,
demand.

##### 1521 [a, b]-Factors Excluding Some Specified Edges In Graphs

**Authors:**
Sizhong Zhou,
Bingyuan Pu

**Abstract:**

Let G be a graph of order n, and let a, b and m be positive integers with 1 ≤ a<b. An [a, b]-factor of G is deﬁned as a spanning subgraph F of G such that a ≤ dF (x) ≤ b for each x ∈ V (G). In this paper, it is proved that if n ≥ (a+b−1+√(a+b+1)m−2)2−1 b and δ(G) > n + a + b − 2 √bn+ 1, then for any subgraph H of G with m edges, G has an [a, b]-factor F such that E(H)∩ E(F) = ∅. This result is an extension of thatof Egawa [2].

**Keywords:**
graph,
minimum degree,
[a,
b]-factor.

##### 1520 A Novel Forgetting Factor Recursive Least Square Algorithm Applied to the Human Motion Analysis

**Authors:**
Hadi Sadoghi Yazdi,
Mehri Sadoghi Yazdi,
Mohammad Reza Mohammadi

**Abstract:**

This paper is concerned with studying the forgetting factor of the recursive least square (RLS). A new dynamic forgetting factor (DFF) for RLS algorithm is presented. The proposed DFF-RLS is compared to other methods. Better performance at convergence and tracking of noisy chirp sinusoid is achieved. The control of the forgetting factor at DFF-RLS is based on the gradient of inverse correlation matrix. Compared with the gradient of mean square error algorithm, the proposed approach provides faster tracking and smaller mean square error. In low signal-to-noise ratios, the performance of the proposed method is superior to other approaches.

**Keywords:**
Forgetting factor,
RLS,
Inverse correlation matrix,
human motion analysis.

##### 1519 An Investigation on Overstrength Factor (Ω) of Reinforced Concrete Buildings in Turkish Earthquake Draft Code (TEC-2016)

**Authors:**
M. Hakan Arslan,
I. Hakkı Erkan

**Abstract:**

Overstrength factor is an important parameter of load reduction factor. In this research, the overstrength factor (Ω) of reinforced concrete (RC) buildings and the parameters of Ω in TEC-2016 draft version have been explored. For this aim, 48 RC buildings have been modeled according to the current seismic code TEC-2007 and Turkish Building Code-500-2000 criteria. After modelling step, nonlinear static pushover analyses have been applied to these buildings by using TEC-2007 Section 7. After the nonlinear pushover analyses, capacity curves (lateral load-lateral top displacement curves) have been plotted for 48 RC buildings. Using capacity curves, overstrength factors (Ω) have been derived for each building. The obtained overstrength factor (Ω) values have been compared with TEC-2016 values for related building types, and the results have been interpreted. According to the obtained values from the study, overstrength factor (Ω) given in TEC-2016 draft code is found quite suitable.

**Keywords:**
Reinforced concrete buildings,
overstrength factor,
earthquake,
static pushover analysis.

##### 1518 Analysis of Socio-Cultural Obstacles for Dissemination of Nanotechnology from Iran's Agricultural Experts Perspective

**Authors:**
S. M. Mirdamadi,
S. Esmaeili,
S. A. Tohidloo

**Abstract:**

The main purpose of this research was to analyze Socio-Cultural obstacles of disseminating of nanotechnology in Iran's agricultural section. One hundred twenty eight out of a total of 190 researchers with different levels of expertise in and familiarity with nanotechnology were randomly selected and questionnaires completed by them. Face validity have been done by expert's suggestion and correction, reliability by using Cronbakh-Alpha formula. The results of a factor analysis showed variation for different factors. For cultural factors 19/475 percent, for management 13/139 percent, information factor 11/277 percent, production factor 9/703 percent, social factor 9/267 percent, and for attitude factor it became 8/947 percent. Also results indicated that socio-cultural factors were the most important obstacle for nanotechnology dissemination in agricultural section in Iran.

**Keywords:**
Agriculture,
Iran,
nanotechnology,
public perception,
social-cultural obstacles.

##### 1517 Determining the Maximum Lateral Displacement Due to Sever Earthquakes without Using Nonlinear Analysis

**Authors:**
Mussa Mahmoudi

**Abstract:**

**Keywords:**
Displacement amplification factor,
Ductility factor,
Force reduction factor,
Maximum lateral displacement.

##### 1516 Loading Factor Performance of a Centrifugal Compressor Impeller: Specific Features and Way of Modeling

**Authors:**
K. Soldatova,
Y. Galerkin

**Abstract:**

A loading factor performance is necessary for the modeling of centrifugal compressor gas dynamic performance curve. Measured loading factors are linear function of a flow coefficient at an impeller exit. The performance does not depend on the compressibility criterion. To simulate loading factor performances, the authors present two parameters: a loading factor at zero flow rate and an angle between an ordinate and performance line. The calculated loading factor performances of non-viscous are linear too and close to experimental performances. Loading factor performances of several dozens of impellers with different blade exit angles, blade thickness and number, ratio of blade exit/inlet height, and two different type of blade mean line configuration. There are some trends of influence, which are evident – comparatively small blade thickness influence, and influence of geometry parameters is more for impellers with bigger blade exit angles, etc. Approximating equations for both parameters are suggested. The next phase of work will be simulating of experimental performances with the suggested approximation equations as a base.

**Keywords:**
Centrifugal compressor stage,
centrifugal compressor,
loading factor,
gas dynamic performance curve.

##### 1515 Connectivity Characteristic of Transcription Factor

**Authors:**
T. Mahalakshmi,
Aswathi B. L.,
Achuthsankar S. Nair

**Abstract:**

**Keywords:**
Transcription Factor Proteins,
Hub Proteins,
Shannon Index,
Transfer Free Energy to Surface (TFES).

##### 1514 Robust Parameter and Scale Factor Estimation in Nonstationary and Impulsive Noise Environment

**Authors:**
Zoran D. Banjac,
Branko D. Kovacevic

**Abstract:**

The problem of FIR system parameter estimation has been considered in the paper. A new robust recursive algorithm for simultaneously estimation of parameters and scale factor of prediction residuals in non-stationary environment corrupted by impulsive noise has been proposed. The performance of derived algorithm has been tested by simulations.

**Keywords:**
Adaptive filtering,
Non-Gaussian filtering,
Robustestimation,
Scale factor estimation.

##### 1513 Simulation of a Boost PFC Converter with Electro Magnetic Interference Filter

**Authors:**
P. Ram Mohan,
M. Vijaya Kumar,
O. V. Raghava Reddy

**Abstract:**

This paper deals with the simulation of a Boost Power Factor Correction (PFC) Converter with Electro Magnetic Interference (EMI) Filter. The diode rectifier with output capacitor gives poor power factor. The Boost Converter of PFC Circuit is analyzed and then simulated with diode rectifier. The Boost PFC Converter with EMI Filter is simulated for resistive load. The power factor is improved using the proposed converter.

**Keywords:**
Boost Converter,
Power Factor Correction,
Electro Magnetic Interference,
Diode Rectifier

##### 1512 Negative Slope Ramp Carrier Control for High Power Factor Boost Converters in CCM Operation

**Authors:**
T. Tanitteerapan,
E.Thanpo

**Abstract:**

This paper, a simple continuous conduction mode (CCM) pulse-width-modulated (PWM) controller for high power factor boost converters is introduced. The duty ratios were obtained by the comparison of a sensed signal from inductor current or switch current and a negative slope ramp carrier waveform in each switching period. Due to the proposed control requires only the inductor current or switch current sensor and the output voltage sensor, its circuit implementation was very simple. To verify the proposed control, the circuit experimentation of a 350 W boost converter with the proposed control was applied. From the results, the input current waveform was shaped to be closely sinusoidal, implying high power factor and low harmonics.

**Keywords:**
High power factor converters,
boost converters,
low
harmonic rectifiers,
power factor correction,
and current control.

##### 1511 Study of Influencing Factors of Shrinking Cities Based On Factor Analysis – The Example of Halle, Germany

**Authors:**
Fang Yao,
Minglei Chen

**Abstract:**

City shrinkage is one of the thorny problems that many European cities have to face with nowadays. It is mainly expressed as the decrease of population in these cities. Eastern Germany is one of the pioneers of European shrinking cities with long shrinking history. The paper selects one representative shrinking city Halle (Saale) in eastern Germany as research objective, collecting and investigating nearly 20 years (1993-2010) municipal data after the reunification of Germany. These data based on five dimensions, which are demographic, economic, social, spatial and environmental and total 16 eligible variables. Factor Analysis is used to deal with these variables in order to assess the most important factors affecting shrinking Halle. The results show that there are three main factors determine the shrinkage of Halle, respectively named “demographical and economical factor”, “social stability factor”, and “city vitality factor”. The three factors act at different time period of Halle’s shrinkage: from 1993 to 1997 the demographical and economical factor played an important role; from 1997 to 2004 the social stability factor is significant to city shrinkage; since 2005 city vitality factor determines the shrinkage of Halle. In recent years, the shrinkage in Halle mitigates that shows the sign of growing population. Thus the city Halle should focus on attaching more importance on the city vitality factor to prevent the city from shrinkage. Meanwhile, the city should possess a positive perspective to shift the growth-oriented development to tap the potential of shrinking cities. This method is expected to apply to further research and other shrinking cities

**Keywords:**
Demography,
Factor analysis,
Halle,
Shrinking cities.

##### 1510 A Study on Method for Identifying Capacity Factor Declination of Wind Turbines

**Authors:**
Dongheon Shin,
Kyungnam Ko,
Jongchul Huh

**Abstract:**

The investigation on wind turbine degradation was carried out using the nacelle wind data. The three Vestas V80-2MW wind turbines of Sungsan wind farm in Jeju Island, South Korea were selected for this work. The SCADA data of the wind farm for five years were analyzed to draw power curve of the turbines. It is assumed that the wind distribution is the Rayleigh distribution to calculate the normalized capacity factor based on the drawn power curve of the three wind turbines for each year. The result showed that the reduction of power output from the three wind turbines occurred every year and the normalized capacity factor decreased to 0.12%/year on average.

**Keywords:**
Wind energy,
Power curve,
Capacity factor,
Annual
energy production.

##### 1509 Joint Use of Factor Analysis (FA) and Data Envelopment Analysis (DEA) for Ranking of Data Envelopment Analysis

**Authors:**
Reza Nadimi,
Fariborz Jolai

**Abstract:**

**Keywords:**
Effectiveness,
Decision Making,
Data EnvelopmentAnalysis,
Factor Analysis