StairNet: Top-Down Semantic Aggregation for Accurate One Shot Detection

One-stage object detectors such as SSD or YOLO already have shown promising accuracy with small memory footprint and fast speed. However, it is widely recognized that one-stage detectors have difficulty in detecting small objects while they are competitive with two-stage methods on large objects. In this paper, we investigate how to alleviate this problem starting from the SSD framework. Due to their pyramidal design, the lower layer that is responsible for small objects lacks strong semantics(e.g contextual information). We address this problem by introducing a feature combining module that spreads out the strong semantics in a top-down manner. Our final model StairNet detector unifies the multi-scale representations and semantic distribution effectively. Experiments on PASCAL VOC 2007 and PASCAL VOC 2012 datasets demonstrate that StairNet significantly improves the weakness of SSD and outperforms the other state-of-the-art one-stage detectors

XeCl laser pumped iodine laser using t-C4F9I

An iodine photodissociation laser using t-C4F9I as the active material was pumped by an XeCl laser. An iodine laser output energy of 3 mJ with pulse duration of 25 ns was obtained when the pumping pulse energy was 80 mJ, the iodide pressure was 70 torr, and the reflectance of the output mirror was 85 percent. The high pumping efficiency and low threshold pump power achieved in this experiment are attributable to the high absorption cross section at the pump laser wavelength (308 nm) of the iodide used

Direct solar-pumped iodine laser amplifier

The optimum conditions of a solar pumped iodine laser are found in this research for the case of a continuous wave operation and a pulsed operation. The optimum product of the pressure(p) inside the laser tube and the tube diameter(d) was pd=40 approx. 50 torr-cm on the contrary to the case of a high intensity flashlamp pumped iodine laser where the optimum value of the product is known to be pd=150 torr-cm. The pressure-diameter product is less than 1/3 of that of the high power iodine laser. During the research period, various laser materials were also studied for solar pumping. Among the laser materials, Nd:YAG is found to have the lowest laser threshold pumping intensity of about 200 solar constant. The Rhodamine 6G was also tested as the solar pumped laser material. The threshold pumping power was measured to be about 20,000 solar constant. The amplification experiment for a continuously pumped iodine laser amplifier was performed using Vortek solar simulator and the amplification factors were measured for single pass amplification and triple pass amplification of the 15 cm long amplifier tube. The amplification of 5 was obtained for the triple pass amplification

Christian Model of Mental Health Care for South Korean Youth

The state of mental health in South Korea is very poor, where a flourishing mental health state is rare and a struggling one is the norm. This is true for a wide range of populations, but adolescents, specifically high school students in South Korea, very well may be most vulnerable. Suicide statistics in South Korea are the highest among Economic Co-operation and Development (OECD) nations, with statistics of students’ happiness ranking South Korea at the bottom of the world alongside third-world countries. Studies have identified alcohol abuse, peer pressure, competition at work and in education, and a warped sense of oneself and what is beautiful as some of the sources of this deprived mental state. In investigating this issue, the project takes an approach based on the Christian faith. A Christian understanding of the Fall and the redemptive work of Christ will provide new perspectives, both in understanding a deprived state of mental health, and in developing a model of mental health care that is in alignment with the teachings of Christ. Understanding mental health poverty as broken relationships with others, God, self, and the environment acknowledges that only Christ has the power to redeem and save. How could our model of mental health practices be influenced by a holistic understanding of the causes behind mental health poverty and by defining a completely healthy and flourishing state of mind as one that is in alignment with God’s vision of shalom and our purpose of giving Him praise? The project will systematically examine the causes of poverty of mental health as perceived by high school students in urban South Korea to inform the development of a model of mental health care specifically suited to that population

Microtubule assembly and in vitro development of vitrifield bovine oocytes after in vitro fertilization （ガラス化保存したウシ卵母細胞における体外受精後の微小管形成ならびに体外発育）

信州大学(Shinshu university)博士（農学）ThesisHWANG IN SUL. Microtubule assembly and in vitro development of vitrifield bovine oocytes after in vitro fertilization （ガラス化保存したウシ卵母細胞における体外受精後の微小管形成ならびに体外発育）. 信州大学, 2013, 博士論文. 博士（農学）, 甲第43号, 平成25年9月30日授与.doctoral thesi