• Korean Parent-Child Health Journal
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• v.13 no.2
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• pp.95-101
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• 2010

Purpose: This study is intended to identify difference postpartum depression according to delivery mode in the postpartum women. Methods: The subjects were 239 postpartum women in D and A city. Data collected from June 9, 2006 to August 6, 2007 using structured questionnaire surveys and convenience sampling. Measuring instrument was BDI (Beck Depression Inventory) translated By Lee and Song (1991). Collected data was analyzed by $x^2$-test, ANCOVA, Stepwise Multiple Regression with SPSS/PC 14.0. Results: There were significant differences in postpartum period ($x^2$=12.40, p = .002) and sleeping hours ($x^2$=9.09, p = .011) as analysed distribution of the subjects according to delivery mode. As result of analyzing the difference of postpartum depression according to delivery mode using ANCOVA, C-sec women's postpartum depression was higher than vaginal delivery women statistically (F=6.32, p = .013). As a result of Multiple Regression, income was a influencing factor of postpartum depression in vaginal delivery women and support of spouse and sleeping hours were influencing factors in C-sec women. Conclusion: There were differences in postpartum depression and their influencing factors according to delivery mode. Therefore it is necessary to develop and study a concrete nursing intervention and strategies for reducing the postpartum depression according to delivery mode.

• Educational Technology International
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• v.24 no.1
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• pp.29-51
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• 2023

This study examined the moderating effect of course satisfaction with class on the relationship between the mode of course delivery and learning presence and performance in university settings. Results showed that there was a moderating effect of the course satisfaction on the relationship between course delivery mode and learning presence. Specifically, higher satisfaction with instructor's teaching activities was associated with improved learning presence in face-to-face, blended, and online learning, in that order. However, there was no significant moderating effect on academic performance. These findings suggest that universities should consider not only the mode of course delivery and highlight the importance of systematic course design by instructors.

• Journal of the Korean Operations Research and Management Science Society
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• v.41 no.3
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• pp.75-96
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• 2016

This paper investigates the usefulness of drones in an urban delivery system. We define the vehicle and drone routing problem with time window (VDRPTW) and present a model that can describe a dual mode delivery system consisting of drones and vehicles in the metropolitan area. Drones are relatively free from traffic congestion but have limited flight range and capacity. Vehicles are not free from traffic congestion, and the complexity of urban road network reduces the efficiency of vehicles. Using drones and vehicles together can reduce inefficiency of the urban delivery system because of their complementary cooperation. In this paper, we assume that drones operate in a point-to-point manner between the depot and customers, and that customers in the need of fast delivery are willing to pay additional charges. For the experiment datasets, we use instances of Solomon (1987), which are well known in the Vehicle Routing Problem society. Moreover, to mirror the urban logistics demand trend, customers who want fast delivery are added to the Solomon's instances. We propose a hybrid evolutionary algorithm for solving VDRPTW. The experiment results provide different useful insights according to the geographical distributions of customers. In the instances where customers are randomly located and in instances where some customers are randomly located while others form some clusters, the dual mode delivery system displays lower total cost and higher customer satisfaction. In instances with clustered customers, the dual mode delivery system exhibits narrow competition for the total cost with the delivery system that uses only vehicles. In this case, using drones and vehicles together can reduce the level of dissatisfaction of customers who take their cargo over the time-window. From the view point of strategic flexibility, the dual mode delivery system appears to be more interesting. In meeting the objective of maximizing customer satisfaction, the use of drones and vehicles incurs less cost and requires fewer resources.

• Journal of Korean Institute of Industrial Engineers
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• v.32 no.3
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• pp.163-171
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• 2006

This paper considers a scheduling problem to minimize the sum of the associated scheduling (production/delivery times) cost and the delivery cost for an integrated system of a single production machine and various transportation vehicles with transportation mode selection allowed. Each transportation mode is provided with a fixed number of vehicles at the associated delivery time and cost. The proposed problem is characterized as being NP-hard. Some solution properties are also characterized. Therewith, three heuristic algorithms (called SPT-based, LWF-based and WSPT-based heuristic) and a branch-and-bound algorithm are derived. In order to evaluate the effectiveness and efficiency of the proposed algorithms, computational experiments are made with some numerical instances.

• Journal of Information Technology Services
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• v.9 no.2
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• pp.151-161
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• 2010

Recently, as the era of ubiquitous has arrived, an infrastructure for the short-distance wireless communication has been extended socially, and thus a variety of services are being proposed. The Multimedia Contents Delivery System using the ZigBee, in particular, has an important stance in enlargement of a variety of services in the aspect of individual-oriented service support though Wireless Personal Area Network (WPAN). Nonetheless, the ZigBee, or the IEEE 802.15.4 Standard, has many restrictions on the Multimedia Contents Delivery System due to the low data transport rate. In order to improve the ZigBee which presents a limit on the transport rate at the IEEE 802.15.4 Standard, this thesis has designed the burst mode which is a method of transmitting a certain amount of data in block units at a high speed without any stoppage until the completion of the transmission. Also, to provide a Multimedia Contents Delivery Service with an application of the normal data transmission mode, it improved the transmission performance of the ZigBee. In addition, for the Multimedia Contents Delivery Service under the ubiquitous environment, it designed and implemented a broadcasting Multimedia Contents Delivery System based on the ZigBee to conduct a comparative analysis on the data transmission performance according to the transmission method.

• Journal of Pharmaceutical Investigation
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• v.37 no.6
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• pp.365-368
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• 2007

The primary aim of this study was to investigate the enhancement effect of low-frequency ultrasound on skin permeation. In vitro permeation experiments were performed using Franz modified diffusion cells with ketoprofen as model drug. The effect of various ultrasound factors-ultrasound application mode (continuous mode and discontinuous mode), ultrasound intensity (0.26 $W/cm^2$, and 0.29 $W/cm^2$) and duty cycle (3%, 16%, 50%, and 83%) were studied. The highest permeation was observed at 0.29 $W/cm^2$ intensity, 50% duty cycle, and discontinuous mode. The result suggested the feasibility of low frequency ultrasound application for the phonophoretic transdermal drug delivery system.

• PNF and Movement
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• v.15 no.3
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• pp.373-380
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• 2017

Purpose: The purpose of this study was to investigate of the effects of the mode of delivery on pelvic floor muscle function by examining bladder base movement and urinary incontinence. Methods: This study was conducted on 100 females who had delivered in the previous 3-8 months. There were 2 groups: 56 vaginal deliveries and 44 cesarean section deliveries. Prior to the study, a survey was conducted on the subjects' general status, delivery mode, urinary incontinence, and physical activity. The groups could not be blinded due to scar tissue from the operations. The function of the pelvic floor muscle was observed with the bladder base movement using transabdominal ultrasound during pelvic floor contraction. To objectify and measure the subjective symptoms of subjects suffering from urinary incontinence, an incontinence quality of life (I-QoL) test was administered. Statistical analysis of the data was performed using SPSS version 20.0. An independent t-test was used to assess the statistical significance of pelvic floor muscle function between the 2 groups after delivery. Results: The movement of the bladder base in the pelvic floor muscle function was decreased in the vaginal delivery group, but the difference was not significant. Urinary incontinence was significantly increased in the vaginal delivery group. Conclusion: The function of the pelvic floor muscles was better in the cesarean section group and the incidence of urinary incontinence was relatively low in this group. Therefore, vaginal delivery requires more efforts to restore the function of the pelvic floor muscles than cesarean delivery.

• The Journal of Korean Medicine
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• v.22 no.4
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• pp.121-130
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• 2001

Objectives : As participation of women in public affairs increases, they are more concerned about postpartum management. However, objectivity of its effect tends to be insufficient. This study was done to investigate the clinical applications of postpartum management in Oriental Medicine. Subjects and methods : This clinical study was done on 74 patients who were treated by postpartum management in the Oriental Medical Hospital of Woosuk University from November 1999 to August 2000. We analyzed the changes of hematology and blood chemistry. Then, we examined the differences between two groups : one group had undergone vaginal duct delivery and the other cesarean section in mode of delivery. Results : I) The ratio of vaginal duct delivery to cesarean section was 39:35. Two major age groups were 25-29 and 30-34, respectively 43% and 35%. 2) According to the hematology, hemoglobin, hematocrit, REC and platelet count significantly increased, while WBC and ESR level significantly decreased. 3) To the hematology by mode of delivery, WBC level decreased in both groups. WBC level of the vaginal duct delivery group was significantly lower than that of cesarean section. RBC level increased in both groups, the cesarean section group were statistically significant. Hemoglobin, hematocrit and platelet count increased but they were not significant in either group. 4) To the blood chemistry, Triglyceride (TG), protein, albumin and sodium levels were significantly increased but cholesterol, ALT, BUN, creatinine, potassium and chloride levels were not statistically significant. 5) According to the blood chemistry by mode of delivery, TG level of the vaginal duct delivery group was significantly reduced but the others were not significant. Conclusious : The effective results were shown that postpartum management by Oriental Medicine assisted postpartum health care as well as postpartum anemia.

• Women's Health Nursing
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• v.15 no.4
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• pp.353-361
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• 2009

Purpose: This study aimed to provide fundamental information about childbirth and antenatal care for pregnancy women and to find differences in mother's antenatal care and delivery service satisfaction between vaginal delivery and cesarean section. Methods: This study was conducted in 4 residential areas and a study sample of 184 postpartum mothers who agreed to collect data. Data was collected from September 1 to October 20 2007 and a structured questionnaire were recruited by the survey. The data was analyzed by t-test and chi-squire test using SPSS/WIN 12.0. Results: There was a significant difference in delivery place between vaginal delivery and cesarean delivery. Only 10.7% of vaginal delivery group delivered in general hospitals, however 24.5% of the cesarean section group delivered in general hospitals. Early antenatal care also showed statistical difference in mode of delivery. 43.5% of vaginal delivery mothers visited hospitals for the detection of pregnancy but 28.3% of cesarean section mothers did that. Vaginal delivery mothers more satisfied with her own delivery method and suggested a vaginal delivery to others. Conclusion: These results suggest that cesarean section mother's sensitivity of early antenatal care was less than vaginal delivery mother. Satisfaction related to delivery care services were higher in the vaginal delivery group.

• Perinatology
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• v.29 no.4
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• pp.159-164
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• 2018

Objective: To compare neonatal respiratory morbidity of twins according to birth order related to gestational age and mode of delivery. Methods: We performed the retrospective research of the medical records of 3,224 neonates (1,612 twin pairs) born in a single center from January 2011 to December 2015. Subjects were classified into four gestational age groups: very (<32 weeks), moderate (32-33 weeks), late (34-36 weeks) preterm, and term (${\geq}37weeks$) groups. We investigated clinical characteristics and respiratory morbidity according to birth order related to gestational age group and mode of delivery. Results: We found increased risk of respiratory morbidity in second-born twin than first-born twin (P=0.039). Second-born twin was associated with increased risk of respiratory distress syndrome (RDS) in late preterm group (odds ratio [OR] 2.8, 95% confidence interval [CI] 1.30-5.95), and transient tachypnea of newborn in term group (OR 1.4, 95% CI 1.03-1.81). In vaginal delivery mode, there was no difference of respiratory morbidity between first and second-born twin in each group, but in cases of Cesarean delivery, second-born twin was related with a greater risk of RDS in late preterm group (OR 2.3, 95% CI 1.07-5.09). Birth order and Cesarean section independently increased the risk of RDS (adjusted OR [aOR] 1.69, 95% CI 1.12-2.54; aOR 2.14, 95% CI 1.25-3.66, respectively). Conclusion: Second-born twin and Cesarean delivery are associated with increased risk of RDS, especially in late preterm twins.