scholarly journals Analysis of 4G mobile network coverage in UTeM technology campus

2020 ◽  
Vol 18 (2) ◽  
pp. 882
Author(s):  
Zahariah Manap ◽  
Anis Suhaila Mohd Zain ◽  
Rahaini Mohd Said ◽  
Shawn Shivaneson Balakirisnan
Keyword(s):  
Open Source Software ◽  
Mobile Network ◽  
Propagation Loss ◽  
Network Coverage ◽  
Received Signal Strength Indicator ◽  
Signal Degradation ◽  
Two Factors ◽  
Grid Points ◽  
Coverage Profile ◽  
Better Than

<p><span>This paper proposes an analysis of the coverage performance of 4G cellular services in UTeM Technology Campus. The performance of the cellular services is presented as the network’s coverage profile which is based on the received signal strength indicator (RSSI). The area under study is virtually divided into 64 grid points where the average RSSI measurements are captured by using an open source software namely G-Mon. The measured values are mapped into the network coverage profile which represents the signal reception quality at each of the grid points. A statistical analysis called Two-Way ANOVA is performed to investigate the correlation of the performance of 4G cellular services in UTeM Technology Campus with the mobile phone brands and service operators. Based on the analysis, it is found that the signal reception in outdoor areas are better than that of indoor areas. In addition, the analysis shows that the propagation loss and signal degradation are two factors that contribute to the 4G services’ performance in UTeM Technology Campus. </span></p>

Accuracy Analysis of DEM Based on Coons Surface

2011 ◽  
Vol 65 ◽  
pp. 214-217
Author(s):  
Yao Ge Wang ◽  
Peng Yuan Wang
Keyword(s):  
Spatial Pattern ◽  
Spatial Autocorrelation ◽  
Boundary Curve ◽  
Digital Elevation ◽  
Grid Points ◽  
Elevation Model ◽  
Global Spatial Autocorrelation ◽  
Core Problem ◽  
Dem Model ◽  
Better Than

Interpolation is the core problem of Digital Elevation Model (DEM). The Coons DEM model is better than bilinear interpolation and moving surface fitting. It is constructed by grid boundary curve, the curve interpolates by some adjoining grid points. Its spatial pattern of error is random in global area, there is no significant global spatial autocorrelation, but it is an increasing trend along with the terrain average gradient increases.There is significant local spatial autocorrelation, the spatial pattern of error converges strongly in local areas.

Logic and Moral Dilemmas

1998 ◽  
pp. 82-87
Author(s):  
E.F. Karavaev
Keyword(s):  
Philosophy Of Education ◽  
Real Life ◽  
Moral Dilemmas ◽  
Moral Code ◽  
Critical Approach ◽  
Two Factors ◽  
Moral Rules ◽  
Better Than

Logic is of great importance for the philosophy of education. In particular, logic provides a rational and critical approach in ethics, helping us understand the nature of moral dilemmas. Some suggest that all moral dilemmas result from some kind of inconsistency in the moral rules. Unsolvable moral situations simply reflect implicit inconsistencies in our existing moral code. If we are to remain moral as well as logical, then we must restore consistency to our code. This is accomplished by adding exception clauses to current principles, and giving priorities to some principles over others, or by some other device. I argue that we must accept moral dilemmas as an essential part of real-life reality on the grounds that some moral statements concern values. According to Moore's "axiological thesis," whether these statements are true depends on two factors: the set of alternatives from which we make an evaluation, and the scale of values with which we rate them. Also, it is possible that a given alternative is no better than another in some respect. Furthermore, there is no respect in which they are equally good or equally bad (the so-called "Condorcet's effect"). Thus, we must accept moral dilemmas as real rather than apparent.

scholarly journals BEYOND THE SECRETARIAT: ADDRESSING GOVERNANCE ISSUES IN ASEAN ECONOMIC COMMUNITY

2016 ◽  
Vol 62 (03) ◽  
pp. 741-759
Author(s):  
KAEWKAMOL PITAKDUMRONGKIT
Keyword(s):  
Institutional Effectiveness ◽  
Economic Community ◽  
Tariff Barrier ◽  
Trade Facilitation ◽  
Two Factors ◽  
Asean Economic Community ◽  
Better Than

This article investigates interactions between institutional designs and values upheld by states on institutional effectiveness, for the purpose of understanding why particular institutions perform better than the others in extracting compliance and cooperation from countries. I contend that institutional effectiveness — defined as the ability to extract states’ compliance and foster cooperation — is explained by dynamics between institutional functions and actors’ governing principles. The higher the compatibility between these two factors, the higher the degree of institutions’ effectiveness, and vice versa. This argument was validated through cases of non-tariff barrier (NTB) elimination and trade facilitation under the ASEAN Economic Community framework.

scholarly journals Dynamic Study of a Capacitive MEMS Switch with Double Clamped-Clamped Microbeams

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Hatem Samaali ◽  
Fehmi Najar ◽  
Slim Choura
Keyword(s):  
Transmission Line ◽  
Electrostatic Force ◽  
Equations Of Motion ◽  
Actuation Voltage ◽  
Transient Behavior ◽  
Mems Switch ◽  
Grid Points ◽  
Capacitive Mems ◽  
Better Than ◽  
Rf Performances

We study a capacitive MEMS switch composed of two clamped-clamped exible microbeams. We first develop a mathematical model for the MEMS switch where the upper microbeam represents the ground transmission line and the lower one represents the central transmission line. An electrostatic force is applied between the two microbeams to yield the switch to its ON and OFF states. We derive the equations of motion of the system and associated boundary conditions and solve the static and dynamic problems using the differential quadratic method. We show that using only nine grid points gives relatively accurate results when compared to those obtained using FEM. We also examine the transient behavior of the microswitch and obtain results indicating that subsequent reduction in actuation voltage, switching time, and power consumption are expected along with relatively good RF performances. ANSYS HFSS simulator is used in this paper to extract the RF characteristics of the microswitch. HFSS simulation results show that the insertion loss is as low as −0.31 dB and that the return loss is better than −12.41 dB at 10 GHz in the ON state. At the OFF state, the isolation is lower than −23 dB in the range of 10 to 50 GHz.

Detection of Fog Involving Heavy Pollutants by Using the New Geostationary satellite Himawari-8

2020 ◽  
Author(s):  
Hongbin Wang ◽  
Zhiwei Zhang ◽  
Duanyang Liu
Keyword(s):  
Satellite Observation ◽  
Geostationary Satellite ◽  
Japan Meteorological Agency ◽  
Composite Image ◽  
Brightness Temperatures ◽  
The Difference ◽  
Grid Points ◽  
High Level ◽  
Different Levels ◽  
Better Than

&lt;p&gt;Himawari-8 is the new geostationary satellite of the Japan Meteorological Agency (JMA) and carries the Advanced Himawari Imager (AHI), which is greatly improved over past imagers in terms of its number of bands and its temporal/spatial resolution. In this work, two different methods for the detection of the different levels of fog involving heavy pollutants by using the Himawari-8 were developed in China. The two different methods are the method of the difference between the 11.2 mm and 3.9 mm brightness temperatures (BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt;) and the method of 3.9 mm Pseudo-Emissivity (ems&lt;sub&gt;3.9&lt;/sub&gt;).&amp;#160; The 3.9 mm Pseudo-Emissivity is the ratio of the observed 3.9 mm radiance and the 3.9 mm blackbody radiance calculated using the 11.2 mm brightness temperature. We identified the parameters optimal threshold at the 2400 stations and the grid points using the BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt; and ems&lt;sub&gt;3.9&lt;/sub&gt; for different levels of fog involving heavy pollutants. Results on land and sea from the two methods were compared with surface observations from 2400 weather stations in China and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation) VFM (Vertical Feature Mask) products. The results show that both the method of BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt; and the method of ems&lt;sub&gt;3.9&lt;/sub&gt; can accurately identify the different levels of fog involving heavy pollutants and the accuracy of ems&lt;sub&gt;3.9 &lt;/sub&gt;method is slightly better than the BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt;. The accuracy of two methods has increased significantly and the false alarm rate has significantly decreased with the decrease of the visibility. When the visibility is less than 50 m, the HR, FAR and KSS of the BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt; method (the ems&lt;sub&gt;3.9 &lt;/sub&gt;method) were 0.89 (0.90), 0.15 (0.15) and 0.74 (0.75), respectively. When mid- or high-level clouds were removed using surface temperature of the ground observations, the HR and KSS of two methods for the different levels of fog has increased significantly, and the FAR has significantly decreased. When the visibility is less than 1000 m, the HR of the BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt; method (the ems&lt;sub&gt;3.9 &lt;/sub&gt;method) is increased to 0.81(0.85) from 0.71 (0.74), the FAR is decreased to 0.12 (0.13) from 0.27 (0.28), and the KSS is increased to 0.69 (0.72) from 0.44 (0.46). The KSS of two method increase by 0.23 and 0.26, respectively. Three cases analysis show that the fog area can be clearly identified by using the BTD&lt;sub&gt;3.9-11.2&lt;/sub&gt;, ems&lt;sub&gt;3.9&lt;/sub&gt; and RGB composite image. The results of the detection of sea fog by using Himawari-8 data and using CALIPSO VFM products have consistency.&lt;/p&gt;

RANKING DEVELOPER CANDIDATES BY SOCIAL LINKS

2014 ◽  
Vol 17 (07n08) ◽  
pp. 1550005 ◽  
Author(s):  
QI XUAN ◽  
CHENBO FU ◽  
LI YU
Keyword(s):  
Social Networks ◽  
Open Source ◽  
Open Source Software ◽  
Performance Indicators ◽  
Temporal Networks ◽  
Successful Operation ◽  
Weighted Networks ◽  
Ranking Algorithms ◽  
The Future ◽  
Better Than

In open source software (OSS) projects, participants initially communicate with others and then may become developers if they are deemed worthy by the community. Recent studies indicate that the abundance of established social links of a participant is the strongest predictor to his/her promotion. Having reliable rankings of the candidates is key to recruiting and maintaining a successful operation of an OSS project. This paper adopts degree-based, PageRank, and Hits ranking algorithms to rank developer candidates in OSS projects based on their social links. We construct several types of social networks based on the communications between the participants in Apache OSS projects, then train and test the ranking algorithms in these networks. We find that, for all the ranking algorithms under study, the rankings of emergent developers in temporal networks are higher than those in cumulative ones, indicating that the more recent communications of a developer in a project are more important to predict his/her first commit in the project. By comparison, the simple degree-based and the PageRank ranking algorithms in temporal undirected weighted networks behave better than the others in identifying emergent developers based on four performance indicators, and are thus recommended to be applied in the future.

Explaining ideology: Two factors are better than one

2014 ◽  
Vol 37 (3) ◽  
pp. 326-328 ◽  
Author(s):  
Philip Robbins ◽  
Kenneth Shields
Keyword(s):  
Individual Differences ◽  
Political Ideology ◽  
Psychological Factor ◽  
Empathic Concern ◽  
Negativity Bias ◽  
Two Factors ◽  
Better Than

AbstractHibbing et al. contend that individual differences in political ideology can be substantially accounted for in terms of differences in a single psychological factor, namely, strength of negativity bias. We argue that, given the multidimensional structure of ideology, a better explanation of ideological variation will take into account both individual differences in negativity bias and differences in empathic concern.

scholarly journals 5G uplink interference simulations, analysis and solutions: The case of pico cells dense deployment

2021 ◽  
Vol 11 (3) ◽  
pp. 2245
Author(s):  
Balboul Younes ◽  
Fattah Mohammed ◽  
Mazer Saïd ◽  
Moulhime El Bekkali
Keyword(s):  
High Speed ◽  
Mobile Network ◽  
Industrial Applications ◽  
Wireless Transmission ◽  
Interference Avoidance ◽  
Network Coverage ◽  
5G Network ◽  
Radio Resources ◽  
Flexible Management ◽  
The Internet Of Things

The launch of the new mobile network technology has paved the way for advanced and more productive industrial applications based on high-speed and low latency services offered by 5G. One of the key success points of the 5G network is the available diversity of cell deployment modes and the flexibility in radio resources allocation based on user’s needs. The concept of Pico cells will become the future of 5G as they increase the capacity and improve the network coverage at a low deployment cost. In addition, the short-range wireless transmission of this type of cells uses little energy and will allow dense applications for the internet of things. In this contribution, we present the advantages of using Pico cells and the characteristics of this type of cells in 5G networks. Then, we will do a simulation study of the interferences impact in uplink transmission in the case of PICO cells densified deployment. Finally, we will propose a solution for interference avoidance between pico cells that also allows flexible management of bands allocated to the users in uplink according to user’s density and bandwidth demand.

scholarly journals A Proposed Hidden Markov Model Method for Dynamic Device Pairing on Internet of Things End-Devices

2021 ◽  
Vol 14 (3) ◽  
pp. 274-285
Author(s):  
Aji Gautama Putrada ◽  
Nur Ghaniaviyanto Ramadhan
Keyword(s):  
Markov Model ◽  
Hidden Markov Model ◽  
Hidden Markov ◽  
Access Point ◽  
Received Signal Strength Indicator ◽  
Model Method ◽  
Iot Platform ◽  
High Level ◽  
Device Pairing ◽  
Better Than

Dynamic device pairing is a context-based zero-interaction method to pair end-devices in an IoT System based on Received Signal Strength Indicator (RSSI) values. But if RSSI detection is done in high level, the accuracy is troublesome due to poor sampling rates. This research proposes the Hidden Markov Model method to increase the performance of dynamic device pairing detection. This research implements an IoT system consisting an Access Point, an IoT End Device, an IoT Platform, and an IoT application and performs a comparison of two different methods to prove the concept. The results show that the precision of dynamic device pairing with HMM is better than without HMM and the value is 83,93%.

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