scholarly journals Trophic Models of Seagrass Ecosystems in Maqueda Channel, Caramoan Peninsula, Philippines

2019 ◽  
pp. 14-31
Author(s):  
Michael A. Clores ◽  
Michael A. Cuesta

Steady-state trophic models were constructed using the Ecopath with Ecosim software to examine the general status, development trends, and functional integrity of three extensive seagrass meadows located in Maqueda Channel of Caramoan Peninsula, Southern Luzon Island, Philippines. The results show that the ecosystems are composed of 23-24 functional groups with effective trophic levels extending from 1.00 to 3.76. Mixed trophic impacts show that decrease in the biomass of grazers Tripneustes gratilla (collector urchin) had a positive impact on the biomass of seagrasses. On the other hand, a positive effect on the benthic groups is expected with an assumed decrease in the biomass of detritus and phytoplankton. Analysis of the flow network of organic matter and trophic efficiencies showed that flows were generally low for higher TLs but high for lower TLs (i.e., from TL 1 to IV. The ecosystems were found to be in mature and stable state based on the system statistics.

2019 ◽  
Vol 17 (1) ◽  
pp. 28-33
Author(s):  
Y. Yonchev ◽  
N. Keranova

The present study explores the influence of the vegetation period of Burley tobacco on the spread of viruses such as TMW, PVY-Complex, CMV / PVY-Complex, TSWV and CMV. To establish this relation, a correlation analysis is applied and the proven effects are represented by linear regression models. In 2014, the number of days from replanting has a strong positive impact on the percentage of plants infected by PVY-Complex (0.985**) as well as by TMV (0.781*). For 2015, the very strong effect was only seen on CMV / PVY-Complex (0.976**). In 2016, the duration of the period had a positive effect on the spread of CMV / PVY-Complex (0.868*), CMV (0.904 **) and TSWV (0.966**). In 2017 there is a very strong positive correlation between PVY-Complex (0.885*), CMV (0.948**) and TSWV (0.955**) on one hand and the planting period on the other. As a result of the conducted study over the entire four-year period, it has been proven that during the first two years the increase in the vegetation period leads to an increase in the incidence of PVY complex. During the second half of the analyzed period, CMV and TSWV are proved to be affected by the length of the time from the replanting.


2018 ◽  
Vol 6 (4) ◽  
Author(s):  
Hanadi Salameh ◽  
Enad Quandah ◽  
Dr. Hanadi

This research investigates the effect of crowdfunding on entrepreneurship. The population of the study includes Jordanian entrepreneurs, (200) questionnaires were distributed among 200 Jordanian entrepreneurs; the (200) questionnaires were all collected. The researcher used the quantitative research methods in the form of simple liner regression and multi regression. The study confirms that there is a positive impact of crowdfunding on entrepreneurship in general as well as entrepreneurs’ freedom of innovation and value of creation. In addition, it was realized that out of the four investigated crowdfunding methods:  reward, pre-purchasing, donation, equity and lending, the pre-purchasing method has the most positive influence on entrepreneurship freedom of innovation and value of creation. On the other hand, reward, equity, and lending did not contribute any significant effect on entrepreneurship’s value of creation and freedom of innovation compared to the latter two. Furthermore, both crowdfunding processes of all-or- nothing and keep-it-all have significant effect on entrepreneurship with the latter process having a more significant effect than the former.  This study confirmed the positive effect of crowdfunding methods and processes on Jordanian entrepreneurship in term of value of creation and freedom of innovation.


2021 ◽  
Vol 7 (1) ◽  
pp. 71-100
Author(s):  
Ivana Vujanić ◽  
Đorđe Dabetić ◽  
Ivana Erić ◽  
Maja Đokić

This paper examines the existence of a cause-and-effect relationship between state funding and the lifespan of startup companies in Serbia. The literature is dominated by two opposing views. According to first, there is a positive impact of state financial support on the growth and the survival rate of companies. On the other hand, the prevailing notion is that state financial support for startups, especially in countries in transition, is less efficient than other state measures. The goal of this paper is to evaluate the effectiveness of state financial support for newly formed companies in Serbia, given the contradictory results presented. The starting assumption is that the financial resources that the state allocates through subsidies and dedicated loans for start-up companies in Serbia has a positive effect on the duration of their lifespan. The survey covered 100 companies that had been founded in the period of 5 to 6 years. The data obtained was statistically analyzed using appropriate non-parametric methods. Results show the presence of a positive impact of state funded support on the lifespan of start-up companies in Serbia. The results obtained can help further define state policies for the development of small and medium-sized enterprises.


2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Giangiacomo Bravo ◽  
Flaminio Squazzoni ◽  
Károly Takács

Any trust situation involves a certain amount of risk for trustors that trustees could abuse. In some cases, intermediaries exist who play a crucial role in the exchange by providing reputational information. To examine under what conditions intermediary opinion could have a positive impact on cooperation, we designed two experiments based on a modified version of the investment game where intermediaries rated the behaviour of trustees under various incentive schemes and different role structures. We found that intermediaries can increase trust if there is room for indirect reciprocity between the involved parties. We also found that the effect of monetary incentives and social norms cannot be clearly separable in these situations. If properly designed, monetary incentives for intermediaries can have a positive effect. On the one hand, when intermediary rewards are aligned with the trustor’s interest, investments and returns tend to increase. On the other hand, fixed monetary incentives perform less than any other incentive schemes and endogenous social norms in ensuring trust and fairness. These findings should make us reconsider the mantra of incentivization of social and public conventional policy.


Author(s):  
Ngoc Anh Nguyen

The analysis of a data set of observation for Vietnamese banks in period from 2011 - 2015 shows how Capital Adequacy Ratio (CAR) is influenced by selected factors: asset of the bank SIZE, loans in total asset LOA, leverage LEV, net interest margin NIM, loans lost reserve LLR, Cash and Precious Metals in total asset LIQ. Results indicate based on data that NIM, LIQ have significant effect on CAR. On the other hand, SIZE and LEV do not appear to have significant effect on CAR. Variables NIM, LIQ have positive effect on CAR, while variables LLR and LOA are negatively related with CAR.


2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Kumari Kumkum ◽  
R. N. Singh ◽  
Yogershi Rajpoot

There may be so many negative consequences of stress for human beings and dissatisfaction among employees happens to be one of the major problems. It indicates negative feelings that individuals have regarding their jobs or its facets. On the other hand, social support is assumed to be mitigating the relationship between negative aspects of the work environment and job satisfaction. Job stress is said to be associated with job dissatisfaction as well as experience of strain. In view of the above, this study examined the role of job stress and social support in job satisfaction. The sample consisted of 30 school teachers from different school of Varanasi (U.P.). The job stress, job satisfaction and social support scales were administered on the participants. The responses of the participants were converted into scores for statistical analyses. The scores of participants on the scales were correlated. The findings revealed that job stress led to increased job satisfaction. It is against the proposed hypothesis and it appears as if the social support received by the participants is a factor behind it. Two of the four dimensions of social support were found to exert positive impact on job satisfaction but the other two dimensions were not found to be correlated with it. The findings are thoroughly discussed and interpreted.


2021 ◽  
Vol 1 ◽  
pp. 2409-2418
Author(s):  
Summer D. Jung ◽  
Erika Perttunen ◽  
Senni Kirjavainen ◽  
Tua Björklund ◽  
Sohyeong Kim

AbstractAs design research expands its horizon, there has been a recent rise in studies on nontraditional designers. Previous studies have noted the positive effect of diversity in generating ideas. Among different sources of influence, peers outside the design team have been noted for their positive impact on the design process, yet the research on this topic is still in its early stages. Using qualitative data from 40 small and medium-sized enterprises (SMEs) in the American and Finnish food and beverage industries, the current study examines their interactions with other SMEs, shedding light on the influence of peers on creating new design solutions. The findings suggest that peer companies can act as a frequent and impactful source of inspiration for product design ideas. The most prevalent forms of interaction were co-creating products, sharing information, and sharing ingredients. Furthermore, the interactions were voluntary, organic, and improvisational in nature, and physical proximity or previous connections often initiated the interactions. Taken together, a great number of peer influences contributed towards creative new solutions.


2021 ◽  
Vol 13 (2) ◽  
pp. 579
Author(s):  
Caroline Reimann ◽  
Fernando Carvalho ◽  
Marcelo Duarte

The present investigation aims study the sustainability of the business model of the Portuguese SMEs operating in the B2B International market analyzing the influence of dynamic marketing capabilities and adaptive marketing capabilities in their international marketing performance. It will also analyze the moderating effects of Competitive Intensity within this international scenario. A quantitative study was developed, using a questionnaire as a research method. In total, 335 valid responses were collected from Portuguese SMEs in June 2020. To test the hypotheses, multiple hierarchical regressions were performed. As for the analyzes involving Competitive Intensity environments, namely low and high intensity, dummies were developed to evaluate the different effects produced by the capacities in the International Marketing Performance. This study shows the positive impact of the dynamic marketing capabilities and adaptive marketing capabilities on the international marketing performance of the surveyed companies, essentially from the product development management, supply chain management, vigilant market learning and open marketing. when in a low competitive intensity environment only dynamic marketing capabilities had a positive effect on performance, but in a high, competitive, intensity environment both dynamic marketing capabilities and adaptive marketing capabilities showed positive effects in relation to performance. This study innovates by bringing international marketing, through two marketing capacities, from the perspective of SMEs that perform B2B activities.


2019 ◽  
Vol 67 (7) ◽  
pp. 338-349
Author(s):  
Maryam Afshari ◽  
Jalal Poorolajal ◽  
Forouzan Rezapur-Shahkolai ◽  
Mohammad Javad Assari ◽  
Akram Karimi-Shahanjarini

Farmers in developing countries use harmful pesticides while taking few or no protective measures. There is limited evidence on factors affecting their safety measures. The objective of this study was to identify the underlying factors influencing farmers’ protective behaviors (PBs) and use of personal protective equipment (PPE) during the exposure to pesticides. From April to August 2017, a descriptive study was conducted in Twiserkan County in western Iran among 474 farmers from 104 villages. A questionnaire was developed to measure demographic characteristics and factors suggested in integrated agent-centered (IAC) framework. The questionnaire was validated in terms of content validity through expert reviews and tested for reliability in a group of farmers. Data were collected by face-to-face interviews with farmers. Physiological arousal (β = .154, p < .05), intention (β = .345, p < .05), habit (β = .188, p < .05), and contextual factors (β = .101, p < .05) had a significant and positive impact on farmers engaging in pesticide PBs. Among the assessed factors, only physiological arousal (β = .122, p < .05) and habit (β = .646, p < .05) were found to have a significant and positive effect on the use of PPE, but the intention (β = –.039, p > .05) and contextual factors (β = –.009, p > .05) had no significant relation with the use of PPE. The results of this study identified determinants of farmers’ safety measures. Our results suggest that the IAC framework could serve as a guide to developing a more effective intervention for safety measures of Iranian farmers.


2020 ◽  
pp. 056943452096825
Author(s):  
Laurie A. Miller ◽  
James R. Schmidt

This study examined how weekly, externally set deadlines affected the completion of adaptive learning assignments and student outcomes in an introductory macroeconomics course. We imposed different deadline schemes for the same adaptive learning assignments in two sections of the course. One section was given flexible deadlines and the other section was given rigid weekly deadlines. We found that weekly deadlines did not affect assignment completions or total points earned on unit exams. We investigated how the adaptive learning assignments affected student retention of material. A measure of staying on pace in the course provided a positive effect on the comprehensive final exam for students with weekly deadlines. The weekly deadlines may not have influenced assignment completions but consistent engagement with the flow of topics through the course increased student knowledge retention. Regardless of deadline type, completions of adaptive learning assignments positively affected outcomes on the unit exams and final exam. JEL Classifications: A20, A22


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