Impact of Nitrogen and Plant Growth Promoting Rhizobacteria on Yield and Yield Components of Sunflower in a Glasshouse Environment

Nasim, Wajid,Bano, Asghari 한국작물학회 2012 Journal of crop science and biotechnology Vol.15 No.4

The effects of Nitrogen (N) and Plant Growth Promoting Rhizobacteria (PGPR) on growth and development of sunflower (Helianthus annuus L. var. Hysun-33) grown in the greenhouse under a natural environment were studied. The N-use efficiency of a sunflower crop grown under three N rates ($N_1=0kg\;ha^{-1}$, $N_2=120kg\;ha^{-1}$, and $N_3=240kg\;ha^{-1}$) and three PGPR levels ($R_1=0kg\;ha^{-1}$, $R_2=30kg\;ha^{-1}$, and $R_3=60kg\;ha^{-1}$) were investigated. The maximum amount of N resulted in higher total dry matter production per plant and the effect was prominent from 34 days after sowing (DAS). Seed yields differed significantly among different sunflower crops especially at limiting N supply, with significant shifts according to the N level. N uptake was an important parameter for yield at all N rates. The 240 kg N $ha^{-1}$ treatments provided the maximum yield, while the oil contents in these treatments of higher yield showed a lower oil content (%). Harvest index was also significantly correlated to yield across N rates; however, its importance depended much on environmental conditions as well. It can be inferred from the study that sunflower crop is well-supplied with respect to growth, development, yield and yield components, to enhance N efficiency and depends very much on the N supply. All the parameters gave maximum results with the increment of N while PGPR regimes had no prominent impact on the sunflower crop, the target environment, and the target yield level grown under a specified controlled glasshouse environment.

Soil water content distribution mapping using an automatic monitoring system

( Nasim Reza ),( Eliezel Habineza ),( Rejaul Karim ),( Mohammod Ali ),( Shaha Nur Kabir ),( Young Yoon Jang ),( Sun-ok Chung ) 한국농업기계학회 2023 한국농업기계학회 학술발표논문집 Vol.28 No.1

Soil water content plays a crucial role in plant growth, irrigation scheduling, and soil erosion prediction. Automatic sensor-based monitoring systems have emerged as efficient tools to provide continuous soil water content mapping against the traditional method, which is time consuming and limited to single point measurement. This study aimed to develop a sensor-based monitoring system for real-time mapping of soil water content distribution. To assess the variability of soil water content in sandy soil, a soil test bin of 3 m by 3 m was constructed. The system consisted of a series of sensors (SEN0193) installed at different depths, ranging from 0 to 60 cm. The monitoring system was equipped with wireless transmission technology using Arduino Mega 2560 and Raspberry Pi 4B microcontroller. Water content sensors were placed at predetermined locations and the geographic coordinates were obtained using GPS. The microcontroller collected data from the sensors, which was then evaluated using GIS to prepare a map of the soil moisture distribution. The results suggested that the monitoring system had the potential to revolutionize soil water content mapping and monitoring. The system can provide valuable insights into the spatial and temporal variations of soil water content, which can inform irrigation scheduling, crop management, and soil conservation practices.

New Phenylpropanoids from Sasa quelpaertensis Nakai with Tyrosinase Inhibition Activities

Nasim Sultana,이남호 대한화학회 2009 Bulletin of the Korean Chemical Society Vol.30 No.8

Bioactivity-guided fractionation led to the isolation of two new phenylpropanoids, 3-O-p-coumaroyl-1-(4-hydroxy- 3,5-dimethoxyphenyl)-1-propanone (1) and 3-O-p-coumaroyl-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-O-β-gulcopyranosylpropanol (2), together with three known compounds, N-p-coumaroylserotonin (3), N-feruloylserotonin (4) and p-coumaric acid (5) from the leaves of Sasa quelpaertensis Nakai. Their structures were elucidated by spectroscopic methods including 1D and 2D-NMR. Compared to arbutin (IC50 0.048 mM) as a control, compounds 3 and 4 exhibited stronger tyrosinase inhibition activities with an IC50 values of 0.027 mM and 0.026 mM, respectively. Compounds 1 (IC50 0.055 mM) and 2 (IC50 0.053 mM) also showed strong activities.

The Role of Peroral Cholangioscopy in Evaluating Indeterminate Biliary Strictures

Nasim Parsa,Mouen A. Khashab 대한소화기내시경학회 2019 Clinical Endoscopy Vol.52 No.6

Biliary strictures are considered indeterminate when the initial radiologic evaluation and endoscopic retrogradecholangiopancreatography with brush cytology and/or forceps biopsy do not reveal diagnostic findings. Evaluation of these stricturesis challenging and often requires a multidisciplinary approach and multiple procedures. Peroral cholangioscopy allows directvisualization of these lesions and targeted tissue acquisition using miniature biopsy forceps. In the past decade, there have beensignificant improvements in the field of cholangioscopy. These advances have allowed higher-quality image acquisition, easy setup,operation by a single operator, easy maneuverability, and excellent targeted tissue sampling performance. However, the interpretationof cholangioscopic visual findings remains challenging. In this review, we discuss the role of peroral cholangioscopy in the evaluation ofindeterminate biliary strictures.

A New Alkene Glycoside from the Leaves of Sasa quelpaertensis Nakai

Nasim Sultana,Nam Ho Lee 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.4

An Efficient Method of Vehicle Distance Detection Based on Canny edge detector and Gray value intensity

Nasim Arshad,Won hee Kim,Kwang-Seok Moon,Jong Nam Kim 대한전자공학회 2010 ICEIC:International Conference on Electronics, Inf Vol.1 No.1

In this paper, the wheel detection with distance estimation algorithm is proposed using one camera mounted beside the vehicle of our experimental car, Figure 1. The Canny edge detection and gray intensity are applied for the tire marking and vehicle detection in our work. The side of the vehicles can be easily detected by comparing the gray intensity with the road surface color. The image coordinate model is then utilized for the distance estimation with the still images of the vehicle in different distances. The distances used for this study ranged from 30 ㎝ to 100㎝. This system will be extended in the future for estimation of distance in moving vehicle sequences to give us more efficient result.

A Comprehensive Analysis of the End-to-End Delay for Wireless Multimedia Sensor Networks

Nasim Abbas,Fengqi Yu 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.6

Wireless multimedia sensor networks (WMSNs) require real-time quality-of-service (QoS) guarantees to be provided by the network. The end-to-end delay is very critical metric for QoS guarantees in WMSNs. In WMSNs, due to the transmission errors incurred over wireless channels, it is difficult to obtain reliable delivery of data in conjunction with low end-to-end delay. In order to improve the end-to-end delay performance, the system has to drop few packets during network congestion. In this article, our proposal is based on optimization of end-to end delay for WMSNs. We optimize end-to-end delay constraint by assuming that each packet is allowed fixed number of retransmissions. To optimize the end-to-end delay, first, we compute the performance measures of the system, such as end-to-end delay and reliability for different network topologies (e.g., linear topology, tree topology) and against different choices of system parameters (e.g., data rate, number of nodes, number of retransmissions). Second, we study the impact of the end-to-end delay and packet delivery ratio on indoor and outdoor environments in WMSNs. All scenarios are simulated with multiple runtimes by using network simulator-2 (NS-2) and results are evaluated and discussed.

Effect of using recycled coarse aggregate and recycled asphalt pavement on the properties of pervious concrete

Nasim K. Shatarat,Hasan N. Katkhuda,Khaled H. Hyari,Ibrahim Asi 국제구조공학회 2018 Structural Engineering and Mechanics, An Int'l Jou Vol.67 No.3

This paper presents the results of a study that investigated the influence of using recycled coarse aggregate (RCA) and recycled asphalt pavement (RAP) on the properties of pervious concrete (PC). The natural aggregate (NA) was replaced by RCA and RAP in the PC with replacement levels of 0%, 20%, 40%, 60% and 80% by the total weight of NA, respectively. In addition to incorporating RAP and RCA in the same mixes with replacement levels of: (1) 20% RAP and 80% RCA; (2) 60% RAP and 40% RCA; and (3) 80% RAP and 20% RCA. Water permeability, thermal conductivity, density, porosity, void content, and compressive, splitting tensile and flexural strengths were studied in this paper. The results showed that using RCA, RAP, and (RAP-RCA) enhanced the properties of PC in general and improved the mechanical properties significantly in particular. The optimum mix was reported to be the 60% RAP and 40% RCA. Accordingly, the RAP has the potential to be used in PC in order to reduce the negative impact of RAP on the human health and environment.

Seismic response evaluation of concentrically rocking zipper braced frames

Nasim Irani Sarand,Abdolrahim Jalali 국제구조공학회 2020 Structural Engineering and Mechanics, An Int'l Jou Vol.73 No.3

In this study an innovative rocking zipper braced frame (RZBF) is proposed to overcome the deficiencies of common concentrically braced frames. RZBF is an improved rocking concentrically braced frame which is based on combination of rocking behavior and zipper columns. The base rocking joints and post-tensioned bars provide rocking response and restoring force, respectively. Also, zipper columns distribute the unbalance force over the frame height and reduce the damage concentration. To evaluate seismic performance of RZBF, a comparison study is carried out considering concentrically braced frame, zipper braced frame, rocking concentrically braced frame and RZBF. Thereby, a suite of non-linear time history analyses had been performed on four different types of archetypes with four, six, eight, ten and twelve stories. Frames were designed and non-linear time history analyses were conducted in OpenSees. To compare the seismic behavior of the archetypes, roof drifts, residual roof drifts, story drifts, the forces of first and top story braces, PT bars forces, column uplift and base shears were taken in to consideration. Results illustrate that using RZBF, can reduce the damage due to reduced residual drifts. Zipper columns enhance the seismic performance of rocking systems. As the number of stories increase in the RZBF systems, larger top story braces were needed. So the RZBF system is applicable on low and midrise buildings.

Geo-located Positioning and Counting of Rice Plants in UAV images

( Nasim Reza ),( Xu-hua Dong ),( Sang-eon Oh ),( Kyeonghwan Lee ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.2

Rice plants density in the field has a great impact on it’s final yield and grain quality. Precise and timely estimates of plants position and counting provides better farming to assure highyield. But plant position and counting works are very challenging, time consuming and often rely on labor extensive. Unmanned aerial vehicle based imaging provides fast and accurate solution to check plants position and count. The objective of this study was to evaluate geo-located position and counting of rice plants using low altitude UAV images. We used three Sony alpha 5100L digital camera attached to a DJI S1000 octocopter drone. RGB images were taken from an altitude of 8m using and were used for automated feature extraction and matching to generate orthomosaic image. We designed an algorithm to identify rice plant position with coordinates to monitor during the growing period. We calculated ground sampling distance of orthomosaic image and the pixel size in each image. Then, we calculated the distance of plant from the reference position. Finally, we calculated coordinates for each plant using distance information and verified the position. The results showed high accuracy of plant positions and counting. The proposed method indicated that the plant positioning using aerial images could be an ideal technique to monitor each crop throughout the growing season.