• Smart Media Journal
• /
• v.12 no.10
• /
• pp.19-28
• /
• 2023

In the fruit harvesting field, interest in automatic robot harvesting is increasing due to various seasonality and rising harvesting costs. Accurate apple detection is a difficult problem in complex orchard environments with changes in light, vibrations caused by wind, and occlusion of leaves and branches. In this paper, we introduce a dataset and an adaptive heatmap regression model that are advantageous for robot automatic apple harvesting. The apple dataset was labeled with not only the apple location but also the visibility. We propose a method to detect the center point of an apple using an adaptive heatmap regression model that adjusts the Gaussian shape according to visibility. The experimental results showed that the performance of the proposed method was applicable to apple harvesting robots, with MAP@K of 0.9809 and 0.9801 when K=5 and K=10, respectively.

• Food Science and Preservation
• /
• v.16 no.1
• /
• pp.60-67
• /
• 2009

The purpose of this research was to develop the apple dressing sauce added pine mushroom (Tricholoma matsutake Sing.) and chitosan which has excellent functionality and scent. An apple dressing sauce with pine added to it was manufactured and tested for sensuality and also for quality changes during storage. The sensory test of the sauces added pine mushroom, the apple dressing sauce added pine mushroom and the apple dressing added pine mushroom and chitosan scored high points. The chromaticity of the apple dressing sauce with pine mushroom compared to the pine didn't show much difference in the L, a, b values and also in the sauces added pine and chitosan, the apple dressing showed less change. At $4^{\circ}C$ and 25, the viscosity of the sauces with pine mushroom showed a small increase in all samples as the storage duration went on. At $4^{\circ}C$, a continuous decrease of the pH was seen in all of the apple dressing sauce added with pine mushroom on storages and from 30 days the pH seemed to start increasing slightly. During storage, the titratable acidity in all samples of the apple dressing with pine mushroom at $4^{\circ}C$ and $25^{\cird}C$ seemed to some what increase as the term went on but there was no significant differences to the acidity. At $4^{\circ}C$, the total viable cells in the apple dressing with pine mushroom showed $1.7{\times}10^{2}CFU/g$ which was the lowest in the beginning of storage period but as the storage period grew longer the total viable cells increased in all of the samples.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
• /
• v.6 no.11
• /
• pp.2-11
• /
• 1985

과수농사를 짓는데 있어서 어느 해이던 간에 병해충의 발생이 없는 해는 없다. 올해 역시 예년과 마찬가지로 각종 병해충이 발생되었던 한해였다. ''70년도부터 ''85년도까지의 주요 병해충 발생양상을 보면, 점차 증가하고 있는 병해로 사과반점낙엽병과 부패병이 있는데, 이들 병은 ''70년대초에는 거의 무시할 정도의 발생을 보인 병들로 ''78년이후 급증하는 병이며, 해충은 점박이응애, 사과굴나방, 조팝나무진딧물, 포도호랑하늘소 같은 것들로 이들 해충은 현재 농약만으로의 방제가 어려운 상태에 있다. 이와는 반대로 점차 그 발생이 감소하고 있는 병해충은 ''70년초 심하였던 배나무적성병, 복숭아축엽병으로 ''75$\~$''80년도에 와서 거의 미미한 발생을 보이고 있다. 반면 예나 지금이나 지속적인 발생으로 과수재배농가에 피해를 주고 있는 것으로 사과부란병, 복숭아세균성천공병, 심식충류, 잎말이나방류, 깍지벌레류 등이 있다. 이들중 올해 가장 문제가 되었던 것은 사과탄저병으로 금년도의 기상조건이 발병에 좋은 조건이었고, 방제시기에 일기가 불순하여 충실한 방제를 하지 못한 관계로 더욱 심하였다.

• Journal of the Institute of Convergence Signal Processing
• /
• v.21 no.4
• /
• pp.154-161
• /
• 2020

This paper presented the basics of using a sorting system to reduce human effort and increase accuracy. The proposed system has consisted of a camera, motors, and a Raspberry Pi. This system can classify the apples as immature, mature, ripe condtion, and etc. In this experiment, 100 apples were randomly selected by purchasing various apples from a local market. The accuracy percentage was 95% and processing time was about 8 seconds per each apple. The proposed system could be useful to reduce labor.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2021.11a
• /
• pp.1152-1155
• /
• 2021

본 연구에서는 기존의 파괴 또는 비파괴 측정기와는 차별화된 사과의 당도를 간편하게 측정하는 방법을 탐구하고자 하였다. 탐구한 결과, 카메라를 이용해 촬영된 사과의 이미지를 동해 당도 측정이 가능함을 밝혀냈다. 위 사실을 기반으로 라즈베리 파이의 카메라 모듈, 컨베이어 벨트를 결합하여 자동화된 사과 당도 측정기 제작하였다. 컴퓨터 기능을 포함하여 다양한 부가 기능을 가진 라즈베리 파이의 특성상 단순한 당도 측정 기능 외에도 공공 데이터를 활용한 경락 가격, 날씨 정보, 재배 솔루션 제공 등의 서비스 제공이 가능하며 이러한 서비스들은 사과 재배에 많은 기여를 할 것이다. 본 연구는 해당 시스템을 어떻게 구현하고 사용할 수 있는지 제시되어있다.

• The Korean Journal of Zoology
• /
• v.16 no.1
• /
• pp.55-65
• /
• 1973

MDH and LDH isozymes of various tissues of serveral snakes which belong to Colubridae, Crotalidae and Viperidae were studied. MDH isozymes were appeared as two bands in all species. Four LDH isozymes were found inall species of Colubridae, Crotalidae and Viperidae. LDH isozymes of muscle and liver had fundamentally the same pattern. On the other hand, there were two LDH isozymes in the heart of all species and the pattern of heart LDH isozyme was reverse of the pattern in muscle. The pattern of LDH isozymes of stomach tissue can be thought as the same pattern with that of heart in all species, but in the stomach tissue of Crotalidae and Viperidae there were four LDH isozymes.

• Journal of agriculture & life science
• /
• v.43 no.6
• /
• pp.105-109
• /
• 2009

Kyungsan nursery complex which has a vast area for the production of various species of fruit tree stocks is in a high demand of virus-free saplings. Apple tree stocks, the most important products, urgently need more rapid and reliable viral diagnosis. In this study, a bead beater was tested because of convenience in dealing with large number of samples. Also, industrial glass bead abrasive (0.4 mm in diameter) at very low cost was used in a disposable way. For bead beater-aided RNA extraction from apple stem tissues, the guanidine thiocyanate method was confirmed to be very reliable. Silca membrane filter tube in connection to vacuum filtering device was strongly suggested for simplifying RNA capture and washing steps. Apple virus detection was confirmed by RT-PCR.

• Korean journal of applied entomology
• /
• v.54 no.1
• /
• pp.17-23
• /
• 2015

A complete control on quarantine insect pests is required for exporting domestic apples to other countries. To this end, a controlled atmosphere and heat treatment system (CATTS) has been developed as a post-harvest treatment. This study determined the CATTS conditions to control completely two lepidopteran insect pests, the smaller tea tortrix moth, Adoxophyes paraorana and the peach pyralid moth, Dichocrocis punctiferalis, which exhibit different feeding behviors. In both species, the fifth instar larvae were the most tolerant developmental stage to the heat treatment. Under CATTS conditions with 15% $CO_2$ and 1% $O_2$ for 1 h heat treatment at $46^{\circ}C$, the fifth instar larvae of A. paraorana exhibited a complete lethality, while those of D. punctiferalis underwent 88% mortality. To control completely the fifth instar larvae of D. punctiferalis, 2 h heat treatment required under the same atmosphere condition. These CATTS treatment effects were confirmed against over 3,000 fifth instar larvae of each species infesting apples. This study demonstrates that the longer exposure to CATTS conditions is required for the complete disinfestation of the internal apple feeder compared to the non-internal apple feeder.

• Korean journal of applied entomology
• /
• v.53 no.4
• /
• pp.415-425
• /
• 2014

This study investigated population fluctuations in two mite species in apple orchards over 20-year period. The occurrence of two major mite pests infesting apple trees, two-spotted spider mite Tetranychus urticae and European red mite Panonychus ulmi (Acari: Tetranychidae), was investigated from 1992 to 2011 in major apple-producing districts, including four to eight cities, in the southern part of the Republic of Korea. The 20-year trend revealed that more orchards were infested by T. urticae from 1992 to 1999, but thereafter P. ulmi became dominant. The observed mean density of P. ulmi was consistent, whereas that of T. urticae fluctuated during this period. The analysis of occurrence in four time periods reveals that the density of T. urticae decreased after 2002. The monthly sampling, revealed that the density of P. ulmi was higher in April, whereas the density of T. urticae was higher from May to August. This change may be due to a change in the frequency of pesticide spraying, ground vegetation management, a decrease in nitrogen fertilization, and the overall orchard management practices. However, this projection should be examined in more detail. On the basis of the findings of this study, it can be concluded that cultural practices, including fertilization, and environmental changes, such as pesticide spray frequency and integrated pest management practices, affect species dominance and population densities of the two mite species in apple orchards.

• Korean Journal of Culture and Social Issue
• /
• v.25 no.1
• /
• pp.79-99
• /
• 2019

Apologies are used with increasing frequency for mending damaged relations between groups after intergroup conflict. Past research revealed that members of a perpetrator group may engage in (animalistic) dehumanization of victim group members to cope with guilt and responsibility associated with the ingroup's past wrongdoing. We hypothesized that ingroup's apology would relieve perpetrator group members of the moral threat, and therefore would make them perceive more humanness in the victim group members. The study was conducted in the context of South Korea's alleged atrocities against Vietnamese civilians during its military involvement in the Vietnam War. Korean participants read an article on the incidents with Korean government's issuance of an official apology manipulated, and reported their thoughts on the incidents and perceptions of Vietnamese people including their humanness. Contrary to our prediction, apology further enhanced dehumanization of Vietnamese people, even while it also decreased dehumanization through heightened feelings of relief. This study documents a seemingly ironic effect of intergroup apology, and calls for a more careful examination of the consequences of apology before recommending it as a viable strategy for alleviating intergroup tensions.