Performance assessment of mass-based yield prediction for Chinese cabbage yield monitoring applications

( Ashrafuzzaman Gulandaz ),( Sazzadul Kabir ),( Nasim Reza ),( Mohammad Ali ),( Shaha Nur Kabir ),( Sun-ok Chung ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.1

Yield monitoring is a crucial tool for the effective management of agricultural production and accurate measurement of crop yield prediction. The objective of this study was to assess the effectiveness of an impact-based load cell for predicting the mass-based yield of Chinese cabbage for yield monitoring. Specifically, the study aimed to identify the optimal configuration for the load cell setup to ensure accurate yield prediction. The experiments were conducted using two different load cell configurations, including the number and placement of load cells. Two layouts of impact plates were tested; one with two load cells, 150 mm apart, and the other with a single load cell, mounted center on the supporting impact plate. Both of the layouts used an acrylic plate and a 10mm thick polyurethane cushion as supporting impact plate to avoid damage to the load cells and cabbages. The performance of the load cell setup was evaluated by comparing the predicted mass with the actual mass of the cabbage samples. The effects of three variables- conveyor speed, falling height, and impact plate angle on cabbage mass were also considered. Three different conditions were tested, including static condition, vibration, and with vibration and inclination. The single load cell configuration provided the most accurate prediction of mass-based yield, with the maximum R2 value of 0.92, the minimum RMSE of 205g, and an error less than 5% for all experimental variables compared to the double load cell configuration. Based on the findings, it can be concluded that the load cell configuration with a single load cell is reliable and effective tool for predicting mass-based yield monitoring. This configuration can also be extended for other crops with similar characteristics.

Sucrose Derivatives Preparation using Thermomyces lanuginosus Lipase and Their Application

Ashrafuzzaman, Md.,Pyo, Jung In,Cheong, Chan Seong Korean Chemical Society 2014 Bulletin of the Korean Chemical Society Vol.35 No.2

We immobilized Thermomyces lanuginosus lipase to catalyze transesterification reaction in DMF. This lipase was selected after screening among other commercial lipases. We found that prepared immobilized lipase is particularly useful for preparation of 6-O-acylsucrose with higher conversion rate even in 10 g scale. Several solvents were evaluated for selective transesterification reaction. We noticed that the immobilized lipase retained more than 80 % activity after 5 cycles of 96 h reaction. A general method was also developed to purify the products using simple crystallization and precipitation process. Furthermore, 6-O-vinyladipoylsucrose was subjected to synthesis of the corresponding polymer by radical initiator. The sucrose branched polymer can be used further for evaluation of its biodegradability and other biological applications.

Effect of Biofertilizers on Vegetative Growth of Okra

Ashrafuzzaman, M.,Nuruzzaman, M.,Islam, M.Zahurul,Islam, M.Rafiqul The Korean Society of Crop Science 2003 Korean journal of crop science Vol.48 No.2

An experiment was carried out at the Field Laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh from March to July, 2001 to investigate the effect of biofertilizers on morpho-physiological characters of okra. The experiment was laid out in a randomized complete block design with four replications. There were nine treatments such as $\textrm{T}_0$ (control), $\textrm{T}_1$ (Azotobacter biofertilizer), $\textrm{T}_2$ (Azospirillum biofertilizer), $\textrm{T}_3$ (Azotobacter+Azospirillum biofertilizers), $\textrm{T}_4$ (Azotobacter+Cowdung 5 ton $\textrm{ha}^{-1}$), $\textrm{T}_5$ (Azospirillum+Cowdung 5 ton $\textrm{ha}^{-1}$), $\textrm{T}_6$(Azotobacter+Azospirillum+Cowdung 5 ton $\textrm{ha}^{-1}$), $\textrm{T}_7$ (Cowdung 5 ton $\textrm{ha}^{-1}$) and $\textrm{T}_8$ (60% Nitrogen). The experimental results revealed that significant variations exist among the treatments regarding morphological characters e.g. plant height, number of leaves/plant, stem base diameter, tap root length, and physiological characters like, root dry weight, leaf area index and crop growth rate. Number of leaves/plant, stem base diameter, root length, root dry weight, leaf area index and crop growth rate were found higher in $\textrm{T}_4$, $\textrm{T}_5$, $\textrm{T}_6$ and $\textrm{T}_8$ than the others. In all the parameters, $\textrm{T}_8$ gave the similar result with biofertilizers in combination with cowdung treatments and $\textrm{T}_7$ showed identical with $\textrm{T}_0$ (control). Biofertilizer treatments had insignificant effect on 1000-seed weight(g). Experimental results mentioned above revealed that morpho-physioligical characters of okra could be modified by the application of biofertilizer+cowdung. However, biofertilizers+Cowdung treatments were comparable to $\textrm{T}_8$(60% Nitrogen) in this study. This suggests that $\textrm{T}_4$ or $\textrm{T}_6$ or $\textrm{T}_5$ were more benificial in environmentally friendly okra cultivation and may be used as an alternative of inorganic nitrogen by saving cost of production and sustaining productivity.

A Self-Adaptive Approach for the Detection and Correction of Stripes in the Sinogram: Suppression of Ring Artifacts in CT Imaging

Ashrafuzzaman, A. N. M.,Lee, Soo Yeol,Hasan, Md. Kamrul Hindawi Publishing Corporation 2011 EURASIP journal on advances in signal processing Vol.2011 No.1

<P>The digital X-ray detectors often generate stripe artifact in the sinogram which in turn creates ring artifact in the reconstructed micro-Computed Tomography (μ-CT), C-Arm CT, and most recent dental CT images. Such ring artifacts not only obscure image details in the regions of interest but also mask the whole image with some artifacts. In this paper, novel techniques are proposed for the detection and suppression of ring artifacts in the sinogram domain. As ring artifacts are manifested as edge creating stripes, single or contiguous, in the sinogram, they are detected based on a set of specific conditions derived from the second derivative of the sinogram and a new self-adaptive threshold computed from its first derivative. A new method for the detection of wide band contiguous stripes using the mean curve and multilevel polyphase decomposition of the given sinogram is also proposed here. For the correction of ring artifacts, novel variable window moving average (VWMA) and weighted moving average (WMA) filters are proposed in this work. To evaluate and compare the performance of the proposed algorithm, various types of synthetic and real μ-CT images are used. Experimental results show that the proposed method can detect ring artifacts with high accuracy and thus remove them more effectively without imparting noticeable distortion in the image as compared to other reported techniques.</P>

Sucrose Derivatives Preparation using Thermomyces lanuginosus Lipase and Their Application

Md. Ashrafuzzaman,표정인,정찬성 대한화학회 2014 Bulletin of the Korean Chemical Society Vol.35 No.2

We immobilized Thermomyces lanuginosus lipase to catalyze transesterification reaction in DMF. This lipase was selected after screening among other commercial lipases. We found that prepared immobilized lipase is particularly useful for preparation of 6-O-acylsucrose with higher conversion rate even in 10 g scale. Several solvents were evaluated for selective transesterification reaction. We noticed that the immobilized lipase retained more than 80 % activity after 5 cycles of 96 h reaction. A general method was also developed to purify the products using simple crystallization and precipitation process. Furthermore, 6-O-vinyladipoylsucrose was subjected to synthesis of the corresponding polymer by radical initiator. The sucrose branched polymer can be used further for evaluation of its biodegradability and other biological applications.

Volumetric yield prediction of Chinese cabbage using CCD camera

구란다즈아스라푸자만 ( Ashrafuzzaman Gulandaz ),카비르사자둘 ( Sazzadul Kabir ),래자나심 ( Nasim Reza ),알리모하마드 ( Mohammad Ali ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2022 한국농업기계학회 학술발표논문집 Vol.27 No.2

Yield monitoring helps farmers make the proper use of their resources and estimate their crop yield precisely. The objective of the study was to measure the volume of Chinese cabbage using CCD (Charged-coupled device) camera. This system captures RGB images of 30 cabbage samples with the help of two 9-W fluorescent LED light sources, a CCD camera, and an HP core i7 laptop. The camera and LED lights were mounted 1.08 m above the harvester conveyor. The speeds of the conveyor were 0.55 m/s, 0.70 m/s, and 0.85 m/s, respectively, for taking RGB images using the CCD camera, which was triggered by two ultrasonic sensors at a frequency of 5 Hz. Archimedes’ law was used to measure the actual volume of the 30 cabbages in a traditional way. A combination of an RGB image processing technique and a point cloud approach was developed. The images were processed by background subtraction and edge detection algorithms using a Python-based programming language. The volume of cabbage with an ellipsoidal shape was estimated using the box method. Height of each cabbage surface point was found by subtracting the value of each cabbage sample point from the value of the background point. These traditional and box estimation methods provided volumes in the range of 0.003m3 to 0.007m3, respectively. The linear regression approach and t-test analyses (equal variances for means α=0.05) were used to compare the estimated and measured volumes of cabbage, and each method was not substantially different. The results showed that the R2 values were 0.82, 0.74, 0.67 and the root mean square error (RMSE) values were 0.00035 m3, 0.00028 m3 and 0.00025 m3, respectively. In real conditions, the estimated volume can be used to calculate the cabbage yield during harvesting.

Low Expression Profiles of Heat Stress-Related Genes in Capsicum annuum

( M. Ashrafuzzaman ),( S. June Oh ),( Choo Bong Hong ) 한국식물학회 2005 Journal of Plant Biology Vol.48 No.1

A cDNA library was constructed for hot pepper plants that had been heat-shock-treated. We used a modified differential screening method, double negative screening, to isolate 500 cDNA clones that represented genes with low expression levels under conditions of high-temperature stress. Of those 500 clones, 200 were randomly selected for single-read sequencing from the 5` ends. After annotation with Blasts, the sequence was applied to InterProScan to scan for functional motifs of proteins. Among the cDNA clones analyzed, about 41% of the ESTs could not be functionally classified. However, of those that could be, the largest portion of the ESTs (15%) were assigned to the category of cell res-cue and defense; genes involved in cell cycle/DNA processing constituted the smallest group, comprising 1% of the ESTs. Genes related to energy and protein fates constituted the second (10%) and third (9%) largest groups, respectively. Finally, 3% of the ESTs were assigned to transcription, and 2% to signal transduction. The high portion of unclassified ESTs probably resulted from the screening method, which was designed for low-expression messages. Likewise, the high number of ESTs for cell rescue and defense suggests that many genes with low levels of expression are associated with the stress response.

Identification of 1‐phenoxy‐3‐(piperazin‐1‐yl)propan‐2‐ol derivatives as novel triple reuptake inhibitors

Md. Ashrafuzzaman,지수현,안효민,정환원,최다은,박주진,고민지,표정인,Shafioul Azam Sharif Mohammed,이덕형,최성길,송치만,정찬성,한서정 대한화학회 2023 Bulletin of the Korean Chemical Society Vol.44 No.7

Novel 1-phenoxy-3-(piperazin-1-yl)propan-2-ol derivatives were designed and synthesized as potential triple reuptake inhibitors, which simultaneously inhibit serotonin, norepinephrine, and dopamine transporters (SERT, NET, and DAT, respectively). Through neurotransmitter transporter uptake assays, inhibitory activities of 1-phenoxy-3-(piperazin-1-yl)propan-2-ol derivatives were evaluated. We discovered compound 19 exhibited the most potent inhibitory activities against all three monoamine neurotransmitter transporters and the IC50 values of 19 against SERT, NET, and DAT were determined. In addition, binding modes of 19 with SERT, NET, and DAT were predicted by docking studies.

The Effects of Natural Antioxidants on Protein Oxidation, Lipid Oxidation, Color, and Sensory Attributes of Beef Patties during Cold Storage at 4℃

Md. Ashrafuzzaman Zahid,Jin-Kyu Seo,Jun-Young Park,Jin-Yeon Jeong,Sang-Keun Jin,Tae-Seon Park,Han-Sul Yang 한국축산식품학회 2018 한국축산식품학회지 Vol.38 No.5

This study aimed to investigate the use of golden thread extract (GTE), clove extract (CE), and commercially available nitrite for retarding lipid and protein oxidation and for maintaining color stability and sensory attributes in beef patties stored at 4℃. GTE, CE, and nitrite treatment samples were found to be efficient in retarding lipid oxidation as all three treatments resulted in low thiobarbituric acid reactive substance (TBARS) content (p<0.05). By using GTE, CE, and nitrite into beef patties, protein oxidation was not developed. Incorporation of GTE and CE into beef patties maintained color stability by protecting against the decrease of L^*, a^*, b^*, chroma, and hue angle values and exhibited significant influence on sensory characteristics, including color and odor of beef patties (p<0.05). Compared to commercially available nitrite, GTE and CE were more effective as antioxidants for inhibiting lipid oxidation, and preserving color stability of fresh beef patties. The study indicated that GTE and CE could be utilized efficiently to extend the shelf life of beef patties.

Control and arrangement of small-sized suspension-type dehumidifier for ICT based greenhouse environment

구란다즈아스라푸자만 ( Ashrafuzzaman Gulandaz ),레자나심 ( Nasim Reza ),초두리밀론 ( Milon Chowdhury ),키라가샤픽 ( Shafik Kiraga ),정선옥 ( Sun-ok Chung ) 한국농업기계학회 2021 한국농업기계학회 학술발표논문집 Vol.26 No.2

Humidity control inside greenhouses is essential for optimum plant growth and physiological disorders and diseases managements. The humidity response and variability depend extensively on the performance of the dehumidifier. The objective of this research was to evaluate the performance of a small-sized suspension-type dehumidifier in terms of temperature and humidity changes and spatial and vertical variability in a greenhouse. The dehumidifier consisted of a 0.6 kW compressor and a 0.1 kW fan. We compared the performance of dehumidifier among the different installation layouts like one at the center, two at the center (facing opposite directions from the center to the sides), one at either of the sides, two at both of the sides (facing to the center). To evaluate the functional ability of the dehumidifier, 45 temperature and humidity sensors were placed at three layers (top, middle, and bottom) and in five sections for monitoring the environmental status inside the greenhouse. Two additional sensors were placed in front of the dehumidifier and outside of the greenhouse. A wireless sensor network was used to collect the data for 90% to 70% dehumidifier operating conditions and monitor the humidity status during the operation and collected the data. The humidity response results showed that the time required for 90% to 70% dehumidification were 33 minutes. Temperature fluctuates 1degree after 11 minutes in upper layer and 27 minutes in bottom layer. The spatial and variability results indicated that the changes in humidity at, two at the center (facing opposite directions from the center to the sides) were higher than those in the other setup of dehumidifier in greenhouse. The outcomes of this research will be helpful for the development of low-power, small-sized dehumidifying systems and its setup position in greenhouse for cultivation.