• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.15 no.8
• /
• pp.1805-1812
• /
• 2011

Bandpass sampling technique has an advantage that it uses lower sampling frequency than Nyquist criterion. But special care is required in choosing sampling frequency to avoid self-image overlapping in the first Nyquist region. Recently, the second-order BPS techniques which can suppress possible self-image by using an additional ADC and by employing digital signal processing have been proposed. This paper addresses a complex BPS based SDR front-end. Unlike general second-order BPS, it needs simple FIR filter to compensate delay in the second ADC. We show a method to find proper sampling frequencies to down convert RF signals selected by tunable RF filter operating in arbitrary frequency range.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2012.10a
• /
• pp.69-72
• /
• 2012

In the bandpass sampling(BPS), the sampling frequency is lower than the frequency of the RF(radio frequency) signal being sampled. In this method, the baseband spectrum directly appears by the sampling itself, so that it is not necessary to use any down converter, making the receiver's hardware simpler. The second-order BPS uses two identical BPS samplers operating with an offset timing to each other. By a processing with their two sampled signals, it can be possible to cancel the aliasing or interference component if any due to the bandpass sampling. The interpolant filter, which is to manipulate the phase characteristics of the sampled signal, affects the performance of the cancellation. In this paper, a multiband interpolant filter is introduced, with which multiple interference signals from multiple RF bands can be cancelled simultaneously. We suggest several phase characteristics for the interpolant filter and have evaluated their performances through computer simulations. It has been shown that the filter with a continuous phase function gives the better performance.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.32 no.10A
• /
• pp.1065-1071
• /
• 2007

In this paper, in order to research spectrum usage efficiency in urban canyon environment at the microwave band, measurement and channel capacity analysis of multi-antenna technology is described. The measurement data obtained from 3 - 4 stories building area used and the propagation characteristics at the 3.7 and 8GHz band are analysed and compared. In case of $2{\times}2$ MIMO, channel capacities of 3.7 and 8 GHz band are calculated to 9.1 bps/Hz and S bps/Hz and in case of $4{\times}4$ MIMO, 21 bps/Hz and 12.5 bps/Hz respectively. Considering the coverage, SNR and channel capacity in urban environment, MIMO propagation characteristics of 3.7 GHz are more predominate than those of 8 GHz.

• Korean Journal of Medicinal Crop Science
• /
• v.28 no.4
• /
• pp.287-297
• /
• 2020

Background: Type II diabetes is considered as one of the common diseases. Bangpungtongseongsan (BPS) has been used as a traditional medicine for treating obesity and hypertension in Korea. According to previous reports, it has anti-obesity, anti-chronic asthma, anti-oxidant, and anti-inflammatory properties. However, the effects of BPS on type II diabetes have not yet been elucidated. Thus, in this sutudy, we evaluated the water extracts of BPS using type II diabetes animal models. Methods and Results: Each group was orally administered with BPS (170, 850 and 1,700 mg/kg) for approximately 13 weeks. A mixture of 150 mg/kg metformin and 10 mg/kg sitagliptin (MS) was used as a positive control. The glycated hemoglobin (HbA1c) and glucose levels, and hematological parameters including blood urine nitrogen, creatinine, low density lipoprotein and total cholesterol, were measured using blood samples. Treatment with 170 mg/kg BPS decreased the HbA1c and glucose levels in blood without affecting the weights of the animals. However, threatment with 1,700 mg/kg BPS reduced the weights and fatty liver, and increased the blood glucose level in type II diabetes animal models Conclusions: These results indicate that a low dose of BPS for 13 weeks, which reduces HbA1c and blood glucose levels, could be used for the treatment of type II diabetes. However, further studies are required to elucidate how active ingredients of BPS influence HbA1c and glucose levels in blood.

• Journal of Oriental Physiology
• /
• v.14 no.2 s.20
• /
• pp.43-54
• /
• 1999

In order to get the effect of Bangpoongtongsungsan (BPS) water extract on the blood pressure of every 5 group of rats (in normal state of after 3 hours of unanesthetized) was measured and following results were obtained. 1. BPS intraperitoneal injection was not recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME in young rats. 2. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME in young rats. 3. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME's continual injection and BPS continual oral administration in young rats. 4. BPS oral administration was recognized as having the effect of decreasing blood pressure compared with Control on hypertension induced by L-NAME's in adult rats. 5. BPS oral administration was not recognized as having the effect of decreasing blood pressure compared with Control on spontaneous hypertension rats. According to the above results. it is known that BPS extract oral administration decreased the blood pressure of hypertension induced by and more effective to the youth.

• Journal of Communications and Networks
• /
• v.10 no.1
• /
• pp.55-62
• /
• 2008

Bandpass sampling (BPS) techniques for the direct down-conversion of RF bandpass signals have become an essential technique for software defined radio (SDR), due to their advantage of minimizing the radio frequency (RF) front-end hardware dependency. This paper proposes an algorithm for finding the minimum BPS frequency for simultaneously down-converting multiple RF signals through full permutation over all the valid sampling ranges found for the multiple RF signals. We also present a scheme for reducing the computational complexity resulting from the large scale of the purmutation calculation involved in searching for the minimum BPS frequency. In addition, we investigate the BPS frequency allowing for the guard-band between adajacent down-converted signals, which help lessen the severe requirements in practical implementations. The performance of the proposed method is compared with those of other pre-reported methods to prove its effectiveness.

• Maxillofacial Plastic and Reconstructive Surgery
• /
• v.29 no.5
• /
• pp.456-462
• /
• 2007

Since the first description of bisphosphonate related osteonecrosis of the jaw (BRONJ) in 2002, the number of report on the disease has rapidly been increasing. Now, BRONJ is considered as a new entity, which is emerging problem in oral and maxillofacial surgery. Bisphosphonates (BPs) can be categorized into 2 groups: nitrogen-containing and non-nitrogen containing, and nitrogen-containing BPs are considered to have more efficacy and toxicity possibly. It is unusual for osteonecrosis to occur in the maxilla but BRONJ is found in both the mandible and the maxilla, which is one of the special features of BRONJ compared with common infectious osteomyelitis of the jaws. Intravenous BPs are usually more likely to cause BRONJ than oral BPs which are frequently prescribed for osteoporosis and osteopenia. Nonetheless, the use of intravenous BPs cannot be prevented because of systemic condition of the patients. Although it is rare that oral BPs cause BRONJ in osteoporosis/osteopenia patients, we should be aware of BRONJ since the population of the patients is exceedingly increasing with the prolonging of life expectancy. So, we'd like to enlighten upon the problems and solutions of BRONJ.

• Korean Journal of Clinical Laboratory Science
• /
• v.54 no.1
• /
• pp.73-77
• /
• 2022

Blood products (BPs) can only be obtained through blood donation and hence represent a finite resource. BPs should therefore be used conservatively. However, BPs are being used indiscriminately without evidence. The purpose of this study was to evaluate the reasons for the use of BPs and their appropriateness. The investigation was carried out based on hemoglobin levels. Data were obtained from Nov 1, 2020, to Oct 31, 2021, from a hospital's OCS/EMR systems. The BPs were dispensed in 21,303 cases, and the number of hemoglobin levels >7.0 g/dL or higher among red blood cell drugs used by each treatment department was 1,173 (>7.0 g/dL). The misuse of blood transfusions is increasing social costs, with the adequacy of transfusion becoming increasingly important. Hence, each medical institution should review the transfusion guideline evaluation index, check the status of the release of BPs, and institute educational programs covering transfusion guidelines and continually evaluate their adequacy.

• The Journal of Society for e-Business Studies
• /
• v.12 no.2
• /
• pp.17-30
• /
• 2007

In ebXML the choreography of a business process should be modeled by UMM and is finally realized in BPSS. The current UMM and BPSS are developed based on UML 1.4. Recently OMG introduces the UML 2.0, which strengthens the modeling power of activity diagrams and components. If we adopt UML 2.0, the modeling power of UMM is improved but BPSS cannot implement the modeling features. In this paper, we examine the new features of the activity diagram in UML 2.0. We also propose ways to improve the UMM and the BPSS using the new features.

• The Journal of Asian Finance, Economics and Business
• /
• v.8 no.5
• /
• pp.971-977
• /
• 2021

The purpose of this research paper is: (1) to describe the service quality index; (2) describe the data quality index; and (3) describe the anti-corruption index of BPS Trenggalek, Indonesia. The approach chosen is quantitative with the type of survey research. The primary data collection technique was mainly based on a questionnaire distributed to 40 respondents, namely BPS service users in 5 (five) categories: the private sector, the banking industry, academics, offices, or agencies in Trenggalek Regency and universities. The results showed that the quality of BPS services was good and the data quality index where the respondents were satisfied with the data presented by BPS. Meanwhile, testing the anti-corruption index shows that BPS Trenggalek is very anti-corruption in providing services to consumers. The findings of this study suggested that to improve service quality, it is necessary to pay attention to several aspects, including published service requirements, easy requirements to be fulfilled, published procedure information, clear service process flow, published service times, and costs/tariffs are communicated. This study suggests updating data, data relevance, data accessibility, and data completeness to improve data quality. Furthermore, to maintain the very anti-corruption predicate, this study suggests maintaining service by upholding the prevailing ethics and norms.