Seyed Mehdi Nassiri

• Ph.D.
• Faculty member at Shiraz University

In the present study an attempt has been made to use a non-parametric method Data Envelopment Analysis (DEA) for assessing source-wise and operation-wise the Technical Efficiency (TE) and Return-to-Scale (RTS) for paddy production in four zones of the state of Punjab, India. The results were then compared to corresponding ones already obtained from...

Introduction Construction of agricultural greenhouses can be considered as one of the appropriate solutions to meet the growing food demands. However, high energy use in greenhouse productions on the one hand and energy limitation on the other hand are fundamental challenges facing mankind. The present study aims to measure and compare energy effic...

Grading of fruits and vegetables is an initial step after harvesting. It is also an essential operation before packaging. In the present study, different fuzzy algorithms for classification of mature tomato were applied and evaluated based on combinations of fruit color, size and hardness. Fuzzy membership functions of hardness were established by...

Moisture variation and fissure formation of rice kernels during multi-stage intermittent drying (MSID) were simulated and analyzed based on the experimental data obtained in a laboratory-scale infrared-assisted vibratory bed dryer. The variations of drying parameters included far-infrared radiation (FIR) intensity (0, 1000 and 2000 W m⁻²), inlet dr...

Date palm is a dioecious tree which bearing male and female inflorescence on separate trees. Although pollination of date palm occurs naturally, in order to guarantee productivity, the artificial pollination can be carried out in commercial date farms. Up to now, an automatic pollinator has not been developed, and pollination is still carried out m...

A new aspect covering interactions between cells and their surroundings via electromagnetic waves was introduced by applying ultra-weak photon emission (UPE). The UPE originates from the electronically excited species resulting from oxidative metabolic and oxidative stresses associated with the reactive oxygen species (ROS). The ROS plays a critica...

Dielectric spectroscopy has been employed as a simple, low cost and a non-destructive way for prediction of some physicochemical indices of kiwifruit during storage. A parallel-plate capacitor was developed and supplied with sinusoidal voltage waves within a frequency range of 40 kHz – 20 MHz. Dielectric properties of samples were measured by the d...

The aims of this study were to investigate the effect of different reference data extraction (colony-counting) and selection variable methods (Regression Coefficient: RC; Forward and Stepwise Multiple Regression: FMR and SMR) on the performance of PLSR and MLR model to predict TVC value in rainbow-trout fish fillets. TVC values were measured based...

Weed detection is a complicated problem which needs several sources of information to be gathered for successful discrimination. In this paper wavelet texture features were examined to verify their potential in weed detection in a sugar beet crop. Successive steps in a discrimination algorithm were designed to determine the wavelet texture features...

Introduction Iran is a frontier of pomegranate fruit production in the world (with almost 40 % of the world`s production). However due to traditional processing operations is not ranked as the largest pomegranate exporter. Saveh, Neyriz and Ferdows are the top pomegranate producing cities in Iran. Pomegranate is consumed as a fresh fruit as well as...

ARTICLE INFO ABSTRACT-Water management is an essential concept for water intensive crops such as maize dealing with water shortage under drought conditions. Maize production is ranked after wheat and barley in Fars province, Iran. Therefore, the present study was conducted to investigate the effects of planting methods by conventional and modified...

Enhancement of antioxidant capacity of plants by natural antioxidants obtained from medicinal plants can be a simple way to produce stress tolerant plants. Zataria multiflora essential Oil (ZO) is one of the useful antioxidants with potent antioxidant activity. ZO is insoluble in water and can be degraded by light, oxygen, and high temperature. Inc...

The present study investigated the properties of tapioca and gelatinized tapioca starch dispersion and film enriched with carvacrol as antioxidant and antimicrobial agent. The gelatinized tapioca had higher pH and conductivity and similar zeta-potentials and particle sizes than tapioca. Carvacrol decreased the pH, conductivity and particle size and...

Overproduction of nitric oxide (NO) results in nitrative stress, in turn causing peroxidation of lipids, oxidation of protein and damage to nucleic acids among many others. Presumbly, a simple mode to suppression of nitrative stress is found to be a natural antioxidant from aromatic plants. Zataria multiflora essential oil (ZO) is known for its pot...

In this study, two local rough rice cultivars (long and medium grain) were dried by three different drying methods including indirect and mixed-mode active solar dryers, and continuous dryer at three temperature levels of 35°C, 45°C and 55°C. Bending strength of brown rice kernels, percentage of fissured kernels and head rice yield were measured an...

Oxidative corrosion presumably has a great contribution in reducing nutritional and sensory quality of food products by deteriorating vitamins and unsaturated fatty acids and also affecting the shelf-life of foodstuff. In the present research, physical and antioxidant properties of 3% w/v of carboxy methyl cellulose (CMC) and alginate (ALG) filmoge...

Equilibrium moisture content (EMC) at different air relative humidity and temperatures is a vital parameter in optimization of drying and storage processes. In the present study amount of moisture content in lime (Local variety) slice at different ambient temperatures of 30°C, 40°C and 50°C were measured using gravimetric method. The obtained E.M.C...

ABSTRACT- Maize production, which is ranked after wheat and barely in Fars province, Iran, needs a considerable amount of irrigation water that is not available in scarce water conditions in drought situations. Therefore, proper planting method can improve irrigation water management. The objectives of the present study were to investigate the effe...

In the present study two local cultivars of paddy (long and medium grain size) were dried in thin layer by three different methods included indirect active solar dryer, mixed-mode active solar dryer and continuous dryer, at three temperature levels of 35, 45, and 55 o C. Also, paddy was dried by sundry method as the traditional and common used meth...

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In the present study variation of air relative humidity at the inlet and outlet of a cabinet dryer as well as drying kinetic of pear fruit in thin layer were studied. The experiments were conducted at three temperature levels of 40, 50 and 60oC and three air velocity levels of 0.5, 1 and 1.5 m/s. It was observed that the difference between input an...

Dehaulling is one of the important stages in sesame grain processing. It includes soaking, dehusking the grain, and separating the husks from kernels. In the present study, a continuous dehuller for an industrial continuous process layout of grain was designed, fabricated and evaluated. The slope and speed of dehuller were the main factors for labo...

a b s t r a c t Date fruits are subjected to different environmental conditions from harvest to consumption. Since the rheological behavior of fruits are important for any processing operation, the viscoelastic characteristics of date fruits were studied at six moisture content, and four temperature levels of product, using a com-puter vision metho...

Date fruits are subjected to different environmental conditions from harvest to consumption. Since the rheological behavior of fruits are important for any processing operation, the viscoelastic characteristics of date fruits were studied at six moisture content, and four temperature levels of product, using a computer vision method. The whole date...

Nowadays fish is one of the major sources of animal protein that has an important role as a healthy food for people. To supply this useful food source, fish farming in ponds has been considered and developed. Since about 57% of the total cost of fish farms is spent on fish feeds, fish farmers would like to determine the accurate mass of live fishes...

ABSTRACT- The bruising degrades the quality of fresh apple fruit. Reduction in bruise damage is of utmost importance in design and development of processing equipments. The main objective of the present study was to introduce an analytical method to predict the allowable static loads applicable to apple fruits. To predict the strain energy absorbed...

ASTRACT- Mechanical damage degrades fruit quality in the chain from production to the consumption. Damage is due to static, impact and vibration loads during processes such as harvesting, transportation, sorting and bulk storage. In the present study finite element (FE) models were used to simulate the process of the static bruising for apple fruit...

‫‫اﻳﻦ‬ ‫در‬ ‫ﭘﮋوﻫﺶ‬ ‫ﻋﻜﺲ‬ ‫ﺑ‬ ‫ﻣﻘﻄﻌﻲ‬ ‫ﺑﺮداري‬ ‫ﻪ‬ ‫ﺷﺎﺧﺺ‬ ‫ﺑﺮﺧﻲ‬ ‫ﺗﺨﻤﻴﻦ‬ ‫ﺑﺮاي‬ ‫ﻣﺨﺮب‬ ‫ﻏﻴﺮ‬ ‫روش‬ ‫ﻳﻚ‬ ‫ﻋﻨﻮان‬ ‫ﺑﻪ‬ ‫اﻳﻜﺲ‬ ‫اﺷﻌﻪ‬ ‫ﺟﺬب‬ ‫وﺳﻴﻠﻪ‬ ‫اﻧـﺎر‬ ‫ﻣﻴـﻮه‬ ‫ﻛﻴﻔـﻲ‬ ‫ﻫﺎي‬ ‫ﺷﺪ‬ ‫ﺑﺮرﺳﻲ‬ . ‫ﺳﻪ‬ ‫از‬ ‫ﻣﻨﻈﻮر‬ ‫ﺑﺪﻳﻦ‬ ‫رﻗﻢ‬ ‫ﺷﺎﻣﻞ‬ ‫ﻓﺎرس‬ ‫اﺳﺘﺎن‬ ‫ﻣﺤﻠﻲ‬ ‫اﻧﺎر‬ ‫ﻣﻴﻮه‬ : ‫ﺷـﺪ‬ ‫اﺳﺘﻔﺎده‬ ‫ﻛﺎزرون‬ ‫ﺧﺎﻧﻲ‬ ‫و‬ ‫ﺗﺮش‬ ‫رﺑﺎب‬ ،‫ﻣﻠﺲ‬ ‫رﺑﺎب‬ . ‫از‬ ‫ﺣﺎﺻـﻞ‬ ‫ﻣﻘﻄﻌـ...

The moisture content of papaya fruit during drying in a cabinet dryer was estimated using both mathematical and neural network models. The effect of air temperatures (40, 50 and 60 °C) and fruit slice thickness (3, 5, 7 mm) on moisture ratio were investigated. A three-layer perceptron neural network with different training algorithms was designed a...

Fresh egg mass estimation using machine vision technique In the present study a machine vision system was developed for estimating the mass of eggs arranged in a single array. A grabber frame equipped with a mirror was developed for positioning the eggs. Therefore, two images could be captured from each egg. Images were then processed by Matlab sof...

Iran is one of the greatest producers of date in the world. However due to lack of information about its viscoelastic properties, much of the production downgraded during harvesting and postharvesting processes. In this study the effect of temperature and moisture content of product were investigated on stress relaxation characteristics. Therefore,...

In the present study an attempt has been made to use a non-parametric method Data Envelopment Analysis (DEA) for assessing source-wise and operation-wise the Technical Efficiency (TE) and Return-to-Scale (RTS) for paddy production in four zones of the state of Punjab, India. The results were then compared to corresponding ones already obtained from...

The energy-ratio (output energy to input energy ratio) and specific energy (input energy to yield ratio denoted by MJ/kg) of farmers in crop production systems are indices, which can define the efficiency and performance of farms. Technical efficiency (weighted output energy to weighted input energy ratio) is another way to explain the efficiency o...

It is possibte to determine the Technical Efficiency (TE) and Returns-to-Scale (RTS) of farmers on a farm by using the production function (frontier). TWo methods can be employed for establishing the production function frontier, parametric and non-parametric method. In this papers attempt has been made to use non-parametric method i.e. Data Envelo...

Production function is used for optimizing purposes. Such functions are established by parametric or non-parametric approaches. In this study non-parametric method i.e. Data Envelopment Analysis (DEA) has been used to optimize the applied energy in wheat production system in Punjab. Two basic DEA models i.e. input-oriented CCR (Charnes, Cooper and...

In this paper, non parametric Data Envelopment Analysis (DEA) was subjected to the energy data of wheat producers in Punjab state, India, and technical, pure technical and scale efficiencies were calculated for farms both category wise and zone wise. The main objective was to determine the strength of the correlation between non-parametric efficien...

Wheat as a main food source is partly lost in different ways such as planting, harvesting, storage and even in consumption processes. This calls for attention to reducing these losses through application of the results from agricultural research, use of new farming practices, improvements in management system and repair and renewal of farm machiner...

Wheat as a main food source is partly lost in different ways such as planting, harvesting, storage and even in consumption processes. This calls for attention to reducing these losses through application of the results from agricultural research, use of new farming practices, improvements in management system and repair and renewal of farm machiner...

The thermo-hydro rheological theory was investigated on stress relaxation of date fruit at six moisture content and four temperature levels. By time-moisture-temperature superposition principle, a master curve was derived from experimental data. The moisture and temperature shift factor functions determined using polynomial regression technique. Th...

The high moisture content of pears (about 80%) results in a high degree of shrinkage when drying takes place, which strongly affects the fruit structure and quality. In the present study trend of change in shrinkage characteristics and bulk density of pear during drying process by a cabinet dryer, as well as the dried fruit was investigated by eval...