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Showing 15 results for Sharifzadeh
Volume 4, Issue 3 (fall 2023)
Abstract
Problem: A look at the history of the presence of art in public spaces shows that with the change of the paradigm of public art from artist-oriented art to the creation of society-oriented art and audience-oriented art, the choice of the type of public art and the environmental qualities affected by it appear more important. What threatens urban spaces today is the weak connection between the building components of a place, which cannot meet the needs of citizens.
Target: The current research aims to investigate the effect of visual art on environmental quality and tries to create the necessary environmental quality in the design of future urban spaces by experts.
Method: This research is developmental-applied in terms of type, and in terms of method, it has a nest-to-nest combination. To answer the research question, the qualitative research method is used in a nest-by-nest quantity. The statistical population is divided into two quantitative and qualitative parts. In the qualitative group of the statistical population, there were 14 experts who were selected by the snowball method. In the statistical population of quantitative research, the sample size is 180 people based on Cochran's formula and random sampling.
Result: The analysis of the results indicates that according to the results of multivariate regression, the component of visual richness with the value of (1.000) has the highest factor contribution, in the second order, the component of enjoying the environment with the value of (0.920) And the lowest is related to the component of improving the individual sense of belonging with the value (0.244). The special attention of urban designers regarding the structure of spaces and the use of extraction measures from the impact of visual arts components in urban spaces in different scales can increase the quality of urban environments.
Volume 7, Issue 1 (5-2017)
Abstract
The field of entrepreneurship research is now approximately 30–40 years old and has become a significant field of intellectual activity involving thousands of scholars in different countries. Therefore, it is vital to systematically analyze the main strengths, weaknesses, threats and opportunities of entrepreneurship research within the field. Hence current research undertaken with aim to analyze strengths, weaknesses, threats and opportunities (SWOT) of entrepreneurship researches and formulate appropriate strategies for this system. By depth literature review, 55 external factors (25 opportunities and 30 threats) and 48 internal factors (19 strengths and 29 weaknesses) are identified. Then weighting and ranking of the factors ranging from 1 (unimportant) to 4 (very important) took place by using the viewpoints of group of 31 researchers and faculty members in the field of entrepreneurship. Final score of external factors for entrepreneurship researches is 2.881. This implies that entrepreneurship researches couldn’t benefit from opportunities factors or avoids threats factors. Moreover final score of internal factors for entrepreneurship researches is 2.789. This implies that effective internal factor for entrepreneurship researches are strength. Regarding cell number five in internal and external matrix, conservative strategies are accepted in strategic planning for development of entrepreneurship researches. Finally by QSPM technique attractiveness of strategies is specified.
Volume 9, Issue 37 (3-2021)
Abstract
Religious beliefs are shaped by myth. Mythical heroes and innocent Imams are always considered to be among the recurring themes as the sacred and identifying elements of the Iranian culture. They are in the subconscious, beliefs, and traditions of the people. With common goals and similar destiny, they have been influential in the formation of various literary and artistic works, including Ferdowsi's Shahnameh and Taziehs. This study focuses on the semantic decoding of repetitive mythical elements, in two texts from the pre - and post- Islamic eras. Employing the Genette's hypertextual approach, the study analyzes the story of Siavash in Shahnameh (pre-Islamic) and the Tazieh of Imam Hussein) post-Islamic(. The purpose of the research is to find out how the textual narrative was adapted by the theatrical narrative. After explaining the theoretical issues, the summary of the texts, and the characteristics of the heroes, the results are given in a table. The common or unique elements and symbols of thought and actions of the Iranian hero are sometimes manifested in an earthly-mythical and sometimes religious-historical and celestial personalities. Every year, similar rituals are repeated and reproduced in the mourning. The research method is descriptive-comparative and the analysis is done through content analysis and the use of library documents. The findings showed the following symbolic similarities: the halo of light, intelligent horse, white clothes, the presence of extraterrestrials, among others. The difference between the rituals were: the symbol of the plant god, the passage of fire, the Siavashun feather, Zulfiqar, the magical armor, among others.
Introduction
Research Background
There are several research projects conducted on the hero's myth, behavioral pattern, rituals left in their honor, spiritual journey and comparative relations on the texts about Siavash's mourning. Some examples are Dalir (2008) in an article entitled "The Intertextual Relations of Siavash's Story from Shahnameh and the Condolences of the Martyrdom of Imam Hussein’s Tazieh" in which it has examined the intertextual relationship through the similarities of the two stories and the structural comparison, space, and characters of the play. Alizadeh Moghadam (2010) has compared the epic and tragic world of the imitations of Imam (AS) from the perspective of the hero. In the book of mourning for Siavash, by Meskoob (1975), issues about the myth, epic, and mourning of Siavash are given. In the Iranian plays by Ashourpour (1994), and Housouri (2002), some commonalities of general mourning and the mourning of Siavash, which are mostly in the field of mythological beliefs, the genealogy of Siavash and Imam Hussein are investigated. It also has a historical connection with the ritual of Tazieh.
Goals, questions, and assumptions
The goal and the research problem are the adaptation and decipherment of symbolic elements, common intertextual relations, and the mythical and recurring role of the "hero" between the two works. This article seeks to answer the following questions: What are the most important recurring similarities in the mythical symbols of the hero between the two texts? What is the difference between the fields of fiction, narration, the concept of time, place, behavior in Tazieh and Ferdowsi's Shahnameh? What is the effect of the heroes' behavior in tragic and epic literature in Iran on the formation of two types of dramatic literature (in Tazieh) and epic literature (in Shahnameh)? As a research hypothesis, it is suggested that historians have consciously established an intertextual relationship with Shahnameh in line with their goals and motives. Also, the mourning of Siavash of Shahnameh and Majlis Tazieh of Imam Hussein (AS) within intertextual reading has had many connections during the history.
Discussion
The myth of the "hero" in the historical memory (national and religious) of our nation, his role in wars, and the constant confrontation between light and darkness, is one of the most stable and influential common themes in popular culture, literature, and art of different ethnic groups. The repeated presence of the hero in the context of history is considered as one of the influential and pivotal elements in the creation of artistic texts. It is with the connection of myth and history that the heroic character can be given an eternal aspect. In every field, time, and place, his presence can be considered as a believable model. The history of Iran as a whole is, on the one hand, a mixture of ideas (myths), facts (history), popular opinions and beliefs (myths), and documents that exist in various forms, while shaping the existence and identity of the Iranian nation. Recognizing and adapting the role of mythical and historical heroes, their worldview regarding existence and creation, the superhuman and mystical content of their actions and their role modeling in later periods, can meet human needs. In this regard, the reason for the symbolic features of the "hero" as the driving and shaping element of the story of Siavash (in the epic literature of Shahnameh) and Imam Hussein (in the tragic play of Tazieh) need to be compared.
Conclusion
The myth of the hero speaks of the common themes of "human existence and spirituality", aiming to fight demons and oppression. It goes through similar steps to achieve their human and lofty goals, and because of their human nature, they consciously embark on a difficult journey. In the end, with their oppressed and bitter martyrdom, they leave a stable and living model in the minds and executive customs of the people, sometimes in the form of a mythical and sometimes infallible face of religion. They join in the context of history. Similarities and implications in mythological components, the variety of common or unique forms, dense semantic layers in belief, literature and popular art, common and unique symbolic aspects that have high interpretability, all in all show that the two texts are influenced by each other. The findings indicate that the repetitive elements that have become the reason for the ritual and similar repetition every year are to appreciate the sacrifices of the heroes.
References
Alizadeh Moghadam, A. & Vamiri, M. (2019). A comparative study of the characters and heroes of Shahnameh and Tazieh with an approach to dramatic literature. Research in Art and Humanities, 3(17), 19-26.
Ashourpour, S. (1994). Iranian performances. Surah Mehr.
Dalir, A. (2009). Intertextual relations between Siavash's story from Ferdowsi's Shahnameh and the condolence of the martyrdom of Imam Hussein. Honar, 77(4), 176-187.
Ghadernejad, M., Khalandi, A., & Shafei, K. (2019). Re-reading the ritual of mourning for Siavash and mourning for Imam Hussein (Based on the analysis of paintings related to Siavash mourning in Central Asia and a work by "Hossein Zande Rudi". Persian Language and Literature Research, 49(4), 71-94.
Hosuri, A. (2001). Siavoshan. Cheshmeh.
Meskoob, Sh. (1975). The mourning of Siavash (in death and resurrection). Kharazmi.
Volume 12, Issue 4 (Number 4 - 2010)
Abstract
In some conditions, to avoid deterioration and field losses of soybean seeds (Glycine max Merr.) from weathering at end of the season, farmers start to harvest seeds with a high moisture content and so, careful post-harvest drying would be required to maintain the physiological quality of seeds. Response Surface Methodology (RSM) was used to optimize the operating conditions of soybean seed drying. The study was performed using a three-level, four-factor fractional factorial design and aimed at determining the optimum combination of initial moisture content (X1), drying air temperature (X2), air velocity (X3), and depth of loading (X4) that could result in high germination, vigor and field emergence. The seeds of two soybean cultivars (Clark and Sahar) with initial moisture content of 15 to 45% dry weight basis )d.w.b), were dried in different drying air temperatures from 35 to 55°C, air velocity ranging from 0.5 to 1.5 m s-1 and a loading depth of 0.5 to 10 cm. According to the results of germination and vigor tests, the optimum drying conditions for seeds of cv. Clark were obtained at an air temperature of 52ºC, which needs to be decreased with higher initial moisture content. Harvesting can start at about 30% d.w.b initial seed moisture content, if drying is done carefully, but cv. Sahar was more susceptible and the drying air temperature should not exceed 41ºC and harvesting should take place when seeds reach an initial moisture content of below 32%. Moreover, it is strongly recommended to use moderate depths of loading because of best aeration and air circulation and to avoid overdrying. The seed quality indices in this experiment were more sensitive to both air temperature and initial moisture content than air velocity and depth of loading.
Saeed Sharifzadeh, Mani Fathali, Ali Ramezani,
Volume 13, Issue 14 (Second Special Issue 2014)
Volume 13, Issue 14 (Second Special Issue 2014)
Abstract
In this research, interaction of a shock wave with incoming turbulent flow is investigated. To this end, different turbulent flows with different intensities and integral length scales are generated and impact of these turbulent flows on a shock wave are examined. In this study, two-dimensional Navier-Stokes equation is numerically solved using a high order spatial-temporal discretization. For spatial discretization, two different methods are implemented. In stream wise direction, i.e. perpendicular to the shock wave, a sixth-order accurate essentially non-oscillatory method (ENO) has been used which is able to capture the shock wave. In spanwise direction, i.e. parallel to the shock wave, a sixth-order Pade scheme has been used which is able to accurately capture small scale flow field structures. Time integration is performed using a third-order Runge-Kutta method. Overall, it has been observed that the turbulent kinetic energy increases across the shock wave. Fluctuations with larger integral length scale show higher turbulent kinetic energy increase across the shock wave. Further, it has been observed that although the integral length scale of the upstream fluctuations does not influence the location of the shock, the intensity of the upstream fluctuations have a profound effect on the shock wave location.
Volume 14, Issue 2 (6-2011)
Abstract
Objective: The objective of this study is to develop and assess targeted PAMAM-PEG nanocarrier with anti-TAG72 nanobody for t-Bid gene coding construct delivery into the human colonic adenocarcinoma cells. Materials and Methods: Nanobody (Nb) coding sequence was subcloned into pSJ expression vector for large-scale production and then Nb was purified by Ni++ affinity chromatography. SDS-PAGE and western blot analysis were performed to verify purifiction. PAMAM was reacted with PEG at the ratio 1:2 (mol/mol) and anti-TAG72 Nb at the ratio 1:1 (mol/mol). Surface charge and size of resulting nanoparticles were evaluated by Malvern zeta sizer and Nanosight. Efficiency of constructed gene carrier for t-Bid, a killer gene, delivery into colonic adenocarcinoma cells in in vitro was assessed using real time PCR and cell counting assays. Results: Production of nanoparticles with the average size of 162±92 nm and +4.57±0.52 zeta potential was confirmed by nanosight and Malvern zeta sizer in order. Gel retardation assay result verified efficiency of carrier for pDNA comlexation. Real time PCR results confirmed the target gene overexpression in the cancerous cell lines. Conclusion: The results of this research confirms the efficiency of PAMAM dendrimers for gene transferring, positive effect of PEGylation and targeting of nanoparticles by anti-TAG72 nanobody.
Volume 14, Issue 3 (5-2012)
Abstract
Despite considerable effort in developing climate information and demonstrating the potential benefits available to farmers, use of the climate information by farmers in farming decisions has not changed. The present research employed the theory of planned behaviour (TPB) as a theoretical framework to analyze the antecedents of agricultural climate information use behaviour. Fars Province wheat growers (n= 314) were administered a questionnaire survey that measured standard TPB constructs. The data and hypotheses were examined using structural equation modeling (SEM) by AMOS 7. Results from the maximum likelihood estimation showed that attitude was positively related to farmers’ climate information use in farming decisions. Thus, greater attitude (instrumental and affective) toward use of information in farming decisions was associated with stronger intention to engage in behaviour. Chi-square tests and fit indices indicated good fit for the final structural models. The results of this study demonstrated that the modified theory of planned behaviour provided a significant improvement on the model fit by adding a direct causal path linking attitude to behaviour. Applicability of the theory of planned behavior for measuring levels of wheat growers’ climate forecast use and the implications for future research are discussed.
Volume 14, Issue 3 (11-2014)
Abstract
Discrete Element Method (DEM) is a numerical method for computing the motion and effect of a large number of small particles. It is a very common method to solve rock mechanics problems, since it can solve problems containing particles in contact with complicated geometries efficiently. Contact detection is the most time consuming (so the most significant) part of DEM-based problem solving methods. In this article, authors, with the goal of implementing a numerical hydro-mechanical software to analyze and solve DEM rock mechanics problems (DA2), studied and investigated algorithms able to solve contact detection problem. The most algorithms designed to find contacts (contact detection algorithms), lie in two classes: 1) algorithms based on bounding boxes, and 2) algorithms based on hashing. The bounding box idea helps to simplify the contact detection problem and to prevent dealing with particle shapes by enveloping the whole particle in a shape (generally a rectangle or an ellipse) which is easy to check for finding overlaps. Since overlaps of bounding boxes may not directly result in contacts between particles, further checks are needed. In the former class, there are two well-known published algorithms, both based on sorting bounding boxes’ extents, able to find contacts between generally shaped particles in a fast and efficient way: incremental sorting and updating (ISU) algorithm, and double-ended spatial sorting (DESS) algorithm. Hashing algorithms are generally appropriate for particles with uniform sizes. Since rock mechanics problems mostly contain models constituted of blocks with non-uniform sizes, hashing algorithms are not utilized for solving them. In this article, ISU and DESS algorithms along with direct checking (DC) method are compared for their running time results to find the most appropriate (i.e. the fastest) algorithm to find contacts between rock blocks. For this purpose, algorithms were implemented by DA2 software, then, ran in the same environment and for same commonplace geomechanical problems with varying model parameters, like number of blocks, block size variation, angle of discontinuities and friction angle, and compared for their running time results. Results shows that ISU algorithm compared to DESS algorithm gives better/lower running time (ISU is at least twice as fast as DESS), i.e. more performance, and shows less sensitivity to model parameters. Also, ISU algorithm consumes less memory and it is simpler to implement. In the end, for further improvement of performance of ISU algorithm, delayed updating and parallelization solutions are offered. Delayed updating is a common way to optimize algorithms containing two phases of processing and updating. In order to apply delayed updating and parallelization to ISU algorithm, a solution is presented to separate sorting and updating phases of the algorithm. Then, parallelization is applied. Results show that using these techniques, can increase the performance of ISU algorithm by 20%.
Volume 14, Issue 7 (Supplementary Issue - 2012)
Abstract
Iran is one of the countries facing the most severe farmland fragmentation (FF) in rural areas and farmland consolidation (FC) is generally regarded as being a suitable instrument to solve this problem . A case study in the central area of Iran was conducted to explore landholder's attitudes towards issues related to FF and FC. Randomized stratified sampling frame was used to select 146 landholders in 10 villages that operated under Land Renovation and Development Schemes (LRDS). A questionnaire in several sections was developed to address main issues concerning FF and FC. Findings showed that increasing production input costs (labor, fuel, and machinery) is the most severe predicament caused by FF. Landholders believed that partial inheritance system, population increases and lack of job opportunity in off-farm interrelated together are main determinants of FF. Also reduction of land in the process of consolidation operates as a key restraint factor against FC. Physical investments by government and access to credit and loan operate as promoter factors of FC according to landholders’ view. Their most preferred options of FC are the government sponsored farming in rural production cooperative units including traditional cooperatives and informal peasantry societies to facilitate voluntary land consolidation.
Mohammad Sharifzadeh, Mohsen Ghazikhani, Hamid Niazmand,
Volume 16, Issue 12 (2-2017)
Volume 16, Issue 12 (2-2017)
Abstract
In this study, energy and exergy analysis of a two bed adsorption cooling system have been performed. Silica gel-water has been chosen as the adsorbent-refrigerant pair. Analysis is performed for evaluating the effect of operating conditions on the optimal timing and then on the maximum value of the SCP, COP, effectiveness and the minimum value of internal irreversibility and external irreversibility. A lumped parameter mathematical model and a global optimization method called the particle swarm optimization have been used to reach this purpose. In this model, internal and external irreversibility have been calculated with the new method without calculating irreversibility of the cycle internal component. Energy analysis showed that maximum of SCP increases with the increase of the mass flow rate and heat source temperature. Furthermore, an increase in the heat source temperature causes an increase in the COP, but an increase of the mass flow rate causes a decrease in the COP. Exergy analysis reviled that depending on the mass flow rate and heat source temperature, 65-90% of input exergy was expended by internal irreversibility, 1–20% were expended by external irreversibility and 8-14% is transferred to the cold reservoir in evaporator. It is concluded at the low-temperature heat source if the mass flow rate is chosen less than 0.6 kg/effectiveness at heat source temperature 75 is more than 65 and vice versa.
Volume 16, Issue 91 (September 2019)
Abstract
Currently, consumers are aware of the side-effects of chemical additives and are more interested in natural antibacterial compounds as food preservatives, like herbal essential oils and extracts. In this study, the antimicrobial effect of some main components of the essential oils, including thymol, carvacrol, menthol and eugenol has been evaluated against Bacillus cereus (PTCC 1154), Pseudomonas nigrifacience (ATCC 19375), Erwinia carotorova (PTCC 1675) and Xanthomonas campestris (PTCC 1473) by broth microdilution method and agar disc diffusion method. According to the results, the lowest MIC was reported for Thymol which was 50 ppm (Pseudomonas nigrifacience, Erwinia carotorova and Bacillus cereus) and the maximum MIC for Pseudomonas nigrifacience was 100 ppm due to menthol and 125, 125 and 108 ppm for Bacillus cereus, Erwinia carotorova and Xanthomonas campestris respectively due to Eugenol. Menthol presented the broadest growth inhibitory zone (8.9 mm) for Pseudomonas nigrifacience and the narrowest inhibitory zone was reported for Eugenol against Erwinia carotorova (5.9 mm). Menthol and eugenol were the strongest and weakest antimicrobial agents respectively (p-value<0.05). However, all tested components inhibited the microorganisms at different levels and are potent to be used as food preservatives.
Volume 17, Issue 103 (September 2020)
Abstract
In order to investigate the effect of different levels of bentonite and pH of the extract on exposure to bentonite on the healing rate of stevia extract (Stevia rebaudiana Bertoni), a study was conducted on two factors in a completely randomized design with four replications. The first factor contains bentonite in four levels with concentrations of 0 (control), 10, 20 and 30 g / l and the second factor contains different pH of crude extract in five levels with 5.9 (control), they were 5.5, 5, 4.5 and 4, respectively. The results of analysis of variance showed that treatment with different amounts of bentonite had a significant effect on phenol, carotenoid, chlorophyll a, chlorophyll b and chlorophyll and flavonoid extracts. Also the best level of bentonite with the least amount and maximum clarification was 20 g / l with 0.07 mg / ml phenol, 0.36 mg / l carotenoid, chlorophyll a 1 mg / l, Chlorophyll b.03, Chlorophyll 3.03 mg / l and flavonoid content of 2.69 µg / ml were selected for subsequent experiment. The pH of the extract showed a significant effect on the phenol content of the extract and a significant effect on other traits. The best level of pH of the extract with the highest clarification and attention to human health, pH (5) with 0.15 mg/ml phenol, 1.42 mg / l carotenoid, 0.77 mg chlorophyll a Chlorophyll b 0.84 mg/l, chlorophyll b 1.61 mg / l and flavonoid with 2.17 µg / ml were selected. Therefore, the results of this study show that by considering appropriate amounts of dye compounds such as bentonite (20 g / l) at a suitable pH (5), the crude extract, color and transparency of stevia extract can be improved.
F. Sharifzadeh, A. Naghash,
Volume 19, Issue 6 (June 2019)
Volume 19, Issue 6 (June 2019)
Abstract
Today, Ducted Fan micro aerial vehicle much attention in the field of business and research due to the duct and, thus, the ability to be safe in enclosed environments. In order to identify and practical help to control and implement the vehicle in various maneuvers, the experimental example of this VTOL MAV was built by of Amirkabir University of Technology. In this research, in the first step, the modeling of the ducted fan is considered. In this way, after obtaining the dynamic model of the fan, the parameters in this model are calculated, using empirical methods. In this regard, the aerodynamic coefficients of the control levels and the inertia of the fan can be mentioned. In the second step, the controller design of the ducted fan is discussed. -Fan MAV control is one of the important issues in designing this fan due to inherent instability. The study of vehicle that reported shows that nonlinear dynamic inversion is an appropriate choice among control methods due to its successful empirical implementation on . Thus, by choosing this method, the control system was designed to follow the desired command of the vehicle in the Simulink simulation environment. In this process, the position command is first applied to the fan and converted by the controller to the command of state control actuators, after which these commands by changing the angles of the control levels of the fan lead to the change in the angles of the fan’s side, the pitch, and and , thus, achieved a desired position. The results indicated that the desired command was correctly followed; also, the stability of the closed loop system was successfully accomplished by using dynamic inversion method for the Ducted Fan MAV.
Volume 23, Issue 2 (7-2019)
Abstract
The present study seeks to examine the functions of transformational leadership in knowledge-based organizations using the grounded theory. Research method is based on the qualitative method of grounded theory. Depth interviews were conducted with 16 experts of the Technical and Vocational University of Tehran selected through snowball sampling. After open, selective, and axial coding of collected data, 160 primary concepts, 29 subcategories and 5 main categories were extracted. The final outcome of this study is the design of a 5-dimensional model whose dimensions are categorized into four bases of strategy, outcomes, interventional conditions, ground-making conditions and causal conditions. The findings of this study indicate that the main function of transformational leaders is a capacity for organizational adaptability. In fact, transformational leaders at Tehran’s Technical and Vocational University resort to adaptability strategy to affect the performance of followers and manage organizational change. It is, therefore, suggested that transformational leaders strengthen corporate social capital by improving horizontal interactions between colleagues, building trust, engaging and collaborating with employees in decision-making, reinforcing the spirit of taking criticism among themselves and colleagues; empower the human labor by their involvement in important organizational decisions and ultimately encourage employees to adapt to changes through empowerment techniques.
Volume 23, Issue 3 (5-2021)
Abstract
Continuous Biological Control (BC) of pests can reduce unnecessary pesticide applications in rice production, thus promoting occupational safety and health in farming. In this study, the Transtheoretical Model (TTM) of behavior change was examined for its applicability in explaining adoption and maintenance of BC use among 344 rice farmers of Simorgh County, Mazandaran Province in northern Iran, to better understand how farmers change their pest management behavior for incorporating BC. The stages of behavior change in BC use were assessed according to the TTM model, i.e. Pre-Contemplation (PC), Contemplation (C), Preparation (PR), Action (A), and Maintenance (M), in the management of rice stem borer [Chilo suppressalis (Walker)]. Almost three quarters (75.1%) of the farmers were in pre-action stages (43.1% in PC stage, 16.3% in C stage, and 15.7% in PR stage), 15.1% were changing their behavior (A stage), and while few farmers (9.8%) reported continuous use of BC agents for more than two cropping seasons (M stage). Farmers in the early stages of TTM model showed lower education levels, higher income, lower self-consumption of rice, higher grain yields, higher damage by rice stem borer, and lower knowledge levels about natural enemies than those who were in the later stages of change. Moreover, self-efficacy in BC use and perceived advantages of BC use increased through the stages of change, whereas the perceived disadvantages of BC use decreased. This is the first report supporting the appropriateness of the TTM in explaining farmers’ behavior change in BC use, which provides novel evidence on farmers’ adoption process of BC. Extension measures should focus on usual obstacles related to BC use, such as perceived advantages and disadvantages of BC as well as self-efficacy in BC use, targeting to match the stage of change with various intervention strategies.
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