• International Journal of Contents
• /
• v.8 no.4
• /
• pp.42-49
• /
• 2012

Recently the unprecedented progress of Android platform and Google Play has brought more opportunities for individual mobile game developers. When playing an Android 3D game, users can accidentally hit HOME Key or BACK Key or receive an incoming message. Subsequently, another screen will appear on top and make the game application lose focus, or the operating system pause that game. These interruption events may also lead to the loss of game information or the game runs out of user control if that game cannot catch interruption events itself and resume at the exact time. As same as other mobile platforms, Android platform also provides Activity Lifecycle methods to help the game application control interruption problems. However, these methods are not adequate to solve all the interruption events. By implementing ANDCube game, we examine most of the possible interruption cases and propose some solutions to help Android game developers avoid some common interruption cases. Concurrently, we show the ways how a game application can catch all unavoidable interruption events and effectively resume from interruption to obtain a high quality game.

• The Journal of the Acoustical Society of Korea
• /
• v.34 no.4
• /
• pp.310-315
• /
• 2015

A single channel VAD (Voice Activity Detection) algorithm for nonstationary noise environment is proposed in this paper. Threshold values of the feature parameter for VAD decision are updated adaptively based on estimates of means and standard deviations of past non-speech frames. The feature parameter, SPD-TE (Spectral Power Difference-Teager Energy), is obtained by applying the Teager energy to the WPD (Wavelet Packet Decomposition) coefficients. It was reported previously that the SPD-TE is robust to noise as a feature for VAD. Experimental results by using TIMIT speech and NOISEX-92 noise databases show that decision accuracy of the proposed algorithm is comparable to several typical VAD algorithms including standards for SNR values ranging from 10 to -10 dB.

• Journal of the Korean Society of Fisheries and Ocean Technology
• /
• v.24 no.1
• /
• pp.7-11
• /
• 1988

This Paper describes technique for the design of system for telemetering the water temperature at sea. This telemetering device adopts FM-FM system, and its main carrier wave is 146.2MHz. The transmission power is about 1W, and the available distance of transmission is 2km. The telemetering time for the transmission and pause is controlled automatically by the CMOS programmable timer. The water temperature is measured by the electronic thermometer, it is varied by V-F converter which is built to a linear voltage controlled oscillator. The results of the experiment at the place where the receiver is off 2km from the transmitter, the water temperature measured with the mercury thermometer well agree with that of the telemetering device.

• Phonetics and Speech Sciences
• /
• v.6 no.4
• /
• pp.67-77
• /
• 2014

This study investigated (1) whether Korean learners of English use discourse-level prosody in L2 production as native speakers of English do, and (2) whether discourse-level prosody is also found in the Korean language, as is evident in the prosody of native speakers of English. The study compared the production of the same 15 sentences in two types of reading materials, sentence-level and discourse-level. This study analyzed the onset pitch, sentence mean pitch and pause length to examine the paratone (intonational paragraph) realization in discourse-level speech. The results showed that in L2 discourse-level prosody, the Korean speakers were limited in displaying paratone and did not made significant difference between sentence-level and discourse-level prosody. On the other hand, in L1 discourse-level text, both English and Korean participants demonstrated paratone using pitch. However, there were differences in using prosodic cues between two groups. In using pauses, the ES group paused longer before both the orthographically marked and not marked topic sentences. The KS group paused longer only before the orthographically marked topic sentence in both L1 and L2 text reading. In the comparison of sentence-level and discourse-level prosody, the topic sentences were marked by different prosodic cues. English participants used higher sentence mean pitch, and the Korean participants used higher onset pitch.

• 한국연소학회:학술대회논문집
• /
• 2004.11a
• /
• pp.231-237
• /
• 2004

Vacuum carburizing continues to gain acceptance as an alternative to atmosphere carburizing particularly in the car industry. The advantages of low-pressure carburization over atmospheric gas carburization is not only the creation of a surface entirely free of oxide and the environmentally friendly nature of these methods but also an improvement in deformation behaviour achieved by combining carburization with gas quenching, a reduction in batch times by increasing the carburization temperature, low gas and energy consumption and the prevention of soot to a large extent. In present study, an improved vacuum carburizing method is provided which is effective to deposit carbon in the surface of materials and to reduce cycle time. Also LPC process simulator was made to optimize to process controls parameters such as pulse/pause cycles of pressure pattern, temperature, carburizing time, diffusion time. The carburizing process was simulated by a diffusion calculation program, where as the model parameters are proposed with help the experimental results and allows the control of the carburizing process with good accordance to the practical results. Thus it can be concluded that LPC process control method based on the theoretical simulation and experimental datas appears to provide a reasonable tool for prototype LPC system.

• Speech Sciences
• /
• v.7 no.4
• /
• pp.235-252
• /
• 2000

The purpose of this study is to characterize the intonational realizations of vocatives in comparison with those of appositives in English statements and questions, and to compare the realizations produced by English native speakers with those of Korean students. Unlike Pierrehumbert(1980), in which the tag expressions do not have pitch accents, Beckman & Pierrehumbert(1986) proposed that the vocatives have a special status in tonal alignment and duration and that they form an independent phrase with pitch accent. Our results reinforce Beckman & Pierrehumbert(1986): both English native speakers and Korean students realize the vocatives in terms of rising tone, and the appositives in terms of both falling tone in statements and rising tone in questions. Moreover, they pronounced the nouns before vocatives longer than those before appositives. However, native speakers impose the low phrase tone before vocatives in statements and the high tone in questions; whereas, Korean students either put the low phrase tone on pitch contours of both statements and questions, or tend to pause before vocatives, thereby constituting an intonational phrase.

• Journal of Ubiquitous Convergence Technology
• /
• v.2 no.2
• /
• pp.88-96
• /
• 2008

IPTV Content delivery systems over wired networks confront scalability problems due to their high network bandwidth requirement for real-time services. Especially, VoD service provides Trick Mode features such as pause, fast forward and similar operations. However, Trick Mode services are delivered by the method of unicast only for controlling of the stream. With a point of views, this paper propose a new real-time multimedia streaming architecture over IP Networks, which tries to achieve bandwidth efficiency and supporting for mass clients better than traditional unicast services. The proposed methods divide the Transport Stream into a series of segments. After that, this divided partial Transport Stream makes multicast streaming periodically. Meanwhile Set-top Box of a client makes a rearrangement orderly by using Presentation Time Stamp field from the served Transport Stream packets. While the current Transport Stream segment is playing, it should be guaranteed that the next segment is downloaded on time. Consequently, the original video content can be played out continuously. The detail introduction of a new real-time multimedia streaming system with analysis and simulation follows as below.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.23 no.6
• /
• pp.1496-1502
• /
• 1998

In this paper, a real-time audio broadcasting service system which is robust to loaded traffic on the Internet is developed. For implementing reliable real-time data transfer, the transfer characteristics of TCP/IP and UDP/IP was compared and analyzed. For lost packet recovery, redundant audio data algorithm was used and interleaving technique was applied for scattering consecutive packet loss. Test results showed, when using TCP/IP, pause occurred during playback, and when using UDP/IP, a stable receive rate was noticeable but the quality of the sound was lower than that of uisng TCP/IP. The recovery rate using redundant audio data and interleaving technique is shown in Fig. 9 and the delay is shown in Fig 4.

• The Journal of the Korea Contents Association
• /
• v.10 no.4
• /
• pp.186-197
• /
• 2010

The things that you cannot miss when reading Chekhov's plays are "pauses" and ellipses lining up in the middle of the lines. I think what meaning to amplify and how to express a great number of "pauses" and ellipses when one directs Chekhov's works may be a crucial element that makes his works more Chekhov-like. First, proper uses of "pauses" and ellipses may be helpful for determining the characteristics of the characters. So silence in Chekhov drama allows his plays considered relatively lacking actions to become totally different drama texts with musical dynamics, that is, functions as directive or acting material to be treated delicately.

• International Journal of Industrial Entomology and Biomaterials
• /
• v.4 no.2
• /
• pp.149-153
• /
• 2002

Induction of non-diapause eggs and manifestation of quantitative characters were studied in different seasons by low temperature incubation of eggs of a low yielding diapause with coloured cocoons silkworm breed, RDI of Bombyx mori. Hundred percent of nandiapause eggs were induced when the egg incubation was carried out at 15$^{\circ}C$ followed by incubation initially at $25^{\circ}C$ and then at $15^{\circ}C$. The diapause-nondia-pause relation was found to be reversible. Analysis of variance study demonstrated significant variation in all the quantitative characters whereas significant variation due to different incubation treatments was observed for larval span, fifth instar larval span, cocoon yield/10,000 larvae by weight, cocoon weight, cocoon shell weight, and cocoon shell ratio. study on hybrid vigour skewed significant heterosis over mid parent value for four economic characters viz., cocoon weight, cocoon shell weight, cocoon shell ratio and filament length in a Fl hybrid between RD1 with diapause eggs and Japanese type bivoltine $NB_{4} D_{2}$.