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Öğe Ahşap levha endüstrisinde çalışanların kişilik özelliklerinin örgütsel vatandaşlık boyutları ve tükenmişlik düzeyleri üzerine etkisi(Düzce Üniversitesi, 2022) Ersen, Nadir; Akyüz, İlker; Karamanlı, Mustafa; Bayram, Bahadır ÇağrıÇalışmada odun esaslı levha sanayinde çalışanların kişilik özellikleri, örgütsel vatandaşlık davranış gösterme sıklıkları ve tükenmişlik düzeyleri belirlenmeye çalışılmıştır. Ayrıca, kişilik boyutları ile örgütsel vatandaşlık davranış ve tükenmişlik boyutları arasında bir ilişki olup olmadığı ve kişilik boyutlarının örgütsel vatandaşlık ve tükenmişlik boyutlarına etkisi araştırılmıştır. 140 anket değerlendirmeye alınmıştır. Yüz yüze anket yöntemi kullanılmıştır. Çalışma sonucunda, kişilik ve örgütsel vatandaşlık davranış boyutlarının puan ortalaması orta-yüksek ve tükenmiş düzeyi orta düzeyde çıkmıştır. Beş faktör kişilik ile örgütsel vatandaşlık davranış ve tükenmişlik arasında sırasıyla “orta düzeyde ve pozitif” ve “orta düzeyde ve negatif” yönlü bir ilişki bulunmuştur. Kişilik örgütsel vatandaşlık davranışı üzerinde olumlu yönde etkiye sahipken, tükenmişlik düzeyini ise olumsuz yönde etkilemektedir.Öğe Analysis of companies’ intellectual capital performance using the MEREC-based MARCOS method: The case of the BIST forest, paper and printing index(Düzce Üniversitesi, 2025) Ersen, Nadir; Akyüz, İlker; Akyüz, Kadri CemilThis study aims to measure and comparatively rank the intellectual capital performance of companies in the BIST Forest, Paper, and Printing Index by developing the MEREC–MARCOS integrated method, which will contribute to the literature in the field of multi-criteria decision making (MCDM).The study used decision matrices generated from financial data for the years 2020–2024. Criteria weights were determined using the MEREC method, and company performance rankings were performed using the MARCOS method. The reliability of the method was tested using comparative analysis using WASPAS, COPRAS, SAW, and MOOSRA methods, and the Spearman rank correlation coefficient. The analyses revealed that the criteria weights change periodically. While the Intangible Assets (K8) criterion was of the highest importance in 2020–2021, the Market Value–Book Value (K5) criterion gained prominence in subsequent years. In the company rankings, ALKA achieved the highest performance between 2022 and 2024, while DGNMO and MNDTR experienced a decline in performance. The Spearman correlation coefficient averaged 0.95, demonstrating high agreement between the methods. The MEREC–MARCOS method is an effective tool for objective, reliable, and comparative assessment of intellectual capital performance. The method can be adapted to different sectors and decision-making problems, and more flexible decision support systems can be developed by integrating it with fuzzy logic or artificial intelligence-based approaches.Öğe Analysis of furniture products' contribution to Turkey's economy with a hybrid multi-criteria decision making method(North Carolina State Univ Dept Wood & Paper Sci, 2021) Ersen, NadirThe furniture sector has a strategic importance in Turkey. That sector contributes greatly to the national economy, provides high levels of employment, is rapidly growing, and does not have a foreign trade deficit. In this paper, a hybrid multi-criteria decision-making method was used to determine the contribution of some furniture products to Turkey's economy. First, the entropy method was used to determine the weight values of the criteria, and then the ELimination Et Choix Traduisant la REalite (ELimination Et Choice Translating REality) (ELECTRE) method was used to compare and rank the alternatives. As a result of this analysis, the furniture products that contributed the most to the national economy were "seating furniture and parts thereof, other wooden furniture", "wooden bedroom furniture", "other metal furniture", and "parts of furniture other than metal and wood". The least contributing products were "furniture used in medicine, surgical, dental, veterinary, and barber chairs etc.", "plastic furniture", and "furniture other than metal, wood, and plastic".Öğe Artvin’deki orman ürünleri işletmelerinin iş sağlığı ve güvenliğinin risk değerlendirilmesi(Artvin Çoruh Üniversitesi, 2021) Irmak, Serkan; Peker, Hüseyin; Ersen, Nadir; Akyüz, İlkerİş sağlığı ve güvenliğinin önemi alınan tedbirlerle birlikte çalışma ortamını daha güvenli ve verimli hale getirmesi sebebiyle her geçen yıl daha iyi anlaşılmaktadır. Ülkemizde, mobilya ve ahşap endüstrisinde faaliyet gösteren işletmeler kaza riski yüksek işletmeler kategorisinde bulunması nedeniyle iş sağlığı ve güvenliği bakımından önemli bir yerdedir. Bu tür işletmelerde tehlike oluşturabilecek durumlar karşısında önlem alınmadığı takdirde ciddi yaralanma hatta ölüme sebebiyet verebilecek durumlarla karşılaşma olasılığı yüksektir. Bu çalışmada Artvin ili merkezinde bulunan orta ölçekli mobilya ve ahşap endüstrisinde faaliyet gösteren 4 farklı işletmede L Tipi (5X5) matris yöntemi uygulanarak işletmelerde ortaya çıkabilecek iş kazaları, ölüme sebebiyet verecek tehlikeli durumlar ve mesleki hastalıkların önüne geçilmesi için risk değerlendirmesi yapılması amaçlanmıştır. Aynı zamanda, işletmede çalışanlara anket uygulaması yapılarak iş sağlığı ve güvenliği ve çalışma esnasında içinde bulundukları tehlikelerin farkında olup olmadıkları hakkında bilgilere ulaşılmıştır. Sonuç olarak, yüksek tehlikeli sınıf kategorisindeki bu işletmelerdeki çalışanların iş sağlığı güvenliği bilincinin pekiştirilerek, gelecekte işletmede oluşabilecek riskler ve kazaların en aza indirilip çalışanlar açısından daha verimli bir çalışma ortamı sağlanabilir. İş sağlığı ve güvenliği ile ilgili eksikliklerin giderilmesiyle üretim aksaklıklarından doğan maddi kayıpların önüne geçilebilir.Öğe Assessment of global competitiveness of non-wood forest products: the case of Turkey(Institute of Forestry LAMMC, 2020) Ersen, NadirNon-wood forest products (NWFPs) contribute economically to all countries of the world and they are an important source of income, especially for people living in or near the forest. They are also used in many sectors such as medicine, chemistry and paint industry. In this respect, the importance of NWFPs is increasing day by day. In this research, the comparative advantage of NWFPs of Turkey was analyzed. In the analysis of research, it was used the revealed comparative advantage, relative trade advantage, and revealed competitiveness. The research is based on secondary data pertaining to the period 2008–2019. Moreover, in order to determine periodic trends, the determined period was evaluated in two sections covering the periods of 2008–2013 and 2014–2019. It has been found that Turkey had a strong competitiveness in NWFPs between years 2008 and 2019. When NWFPs were examined at subgroup level, Turkey has a comparative advantage in the subgroups 8. Furthermore, it was revealed that the competitive advantage of the period 2008–2013 is higher than of the period 2014–2019Öğe Assessment of medicinal and aromatic plants’ contribution to the country's economy by hybrid multi-criteria decision-making approach: The case of Turkey(Ankara Üniversitesi, 2024) Ersen, NadirMedicinal and aromatic plants contribute to both the national economy and the well- being of forest villagers. In addition, these plants are generally used in a variety of industries such as medicine, food, paint, and perfumery. It is gaining popularity, and individuals are turning to herbal therapy as an alternative medical treatment. These medicinal plants can be popularised and utilised to boost the economies of medicinal-growing countries and provide livelihoods for local stakeholders. Furthermore, overexploitation of these therapeutic plants should be restricted, important species with high marketing potential should be protected, and cultivation of these plants should be encouraged for future use. Against this background, this study employs a hybrid multi-criteria decision-making technique to identify the medicinal and aromatic plants that contribute the most to the Turkish economy. The medicinal and aromatic plants that contributed the most to the country’s economy were found to be poppy seed, thyme, and laurel leaves. Moreover, the seed (sesame seed, flax seed, safflower seed) plants are determined as the least contributing medicinal and aromatic plants to the country’s economy. Cumin, anise, and salvia have also potential in terms of economics. Hence, these findings can help the farmers and decision-makers to determine which plants are more economically beneficial. Thus, plants with high economic value can be cultivated and exported to the rest of the world.Öğe Bibliometric profile of graduate theses regarding “Medical and aromatic plants” in Türkiye(Isparta Uygulamalı Bilimler Üniversitesi, 2024) Ersen, Nadir; Akyüz, İlkerIn this study, it is aimed to reveal the bibliometric profile of graduate (master's and doctorate) studies written on "Medical and Aromatic Plants" in Türkiye in terms of various criteria. For this purpose, the thesis search engine of the Council of Higher Education (CoHE) was searched with the keywords "medical and aromatic plants, aromatic plants and medical plants” in Turkish. As a result of the scanning, 149 graduate theses were identified and 7 of these theses are not open to access. Of the 142 theses, 118 are master's thesis, 23 are doctoral thesis, and 1 is a specialization in medicine. 42% of the graduate theses were conducted under the advisor of professors. The theses were written in many different universities and departments. It has been determined that biology is the subject most covered in graduate theses. Four graduate theses were written in English. 36% of the graduate theses used between 51-100 references. Foreign references were used more in the majority of theses. 77% of the theses were written in the range of 51-150 pages. Quantitative method was used as a method in the majority of theses. In terms of keywords, there is not keywords were used in 8 theses. The most frequently used keywords are medicinal plant(s), medicinal and aromatic plant(s) and aromatic plant(s), respectively. This study guides scientists who want to work on medicinal and aromatic plants.Öğe Competitiveness of forest products industry sector in Turkey: Revealed comparative advantage index(Inst Technol Drewna, 2020) Akyüz, Kadri Cemil; Yıldırım, İbrahim; Ersen, Nadir; Akyüz, İlker; Memiş, DoğanThis study, aimed to determine the competitive advantage position of the forest products industry sector in Turkey between 2001-2017 by using the revealed comparative advantage approach. One of the three sub-production structures (wood and articles of wood; wood charcoal-21 sub-product group) of the forest products industry were examined at the level of their sub-product groups. As a result of the study, "the wood and articles of wood;wood charcoal" sector was far from the desired position in terms of competition. When "the wood and articles of wood;wood charcoal" sector was analyzed on sub-group basis, especially the products of 4411, 4413 and 4415 had competitive position. Moreover, it was found that the trend in Turkey's imports of wood and articles of wood sector was not high. However, imports carried out under specified product groups were carried above the level of imports in Turkey.Öğe Consumer preferences for flooring in Turkey in terms of purchasing and use(Inst Technol Drewna, 2016) Akyüz, İlker; Ersen, Nadir; Tiryaki, SebahattinIn this study, consumer preferences for flooring in terms of purchasing and use, were investigated, as well as consumer attitudes and the reasons for preferences for a particular product, and whether consumer behaviour varied according to gender; age, level of education, occupation and size of household. The study was based on a face-to-face interview of 1005 people throughout Turkey. The data obtained from the survey was analyzed using the statistical package SPSS 19.0 for Windows. According to the results of the study, it is possible to say that the customers preferred flooring which was easy to assemble, with good heat and sound insulation, resistant to physical and mechanical damage, both environmentally- and human-friendlyand aesthetically pleasing. Manufacturers should therefore endeavour to meet these expectations by obtaining positive and negative feedback from users of flooring. In conclusion, it was determined that flooring preference, usage, expectations and consumer complaints may differ according to gender, age, level of education, income level, household size and occupation. This study fills an important gap regarding the investigation of consumer preferences for flooring in terms of purchasing and use in Turkey.Öğe Covid-19’un çalışma sermayesi yönetim etkinliğine etkisi: BIST orman ürünleri, mobilya, kağıt ve basım işletmeleri üzerine bir araştırma(Akademisyenler Birliği Derneği, 2024) Ersen, Nadir; Akyüz, Kadri Cemil; Akyüz, İlkerÇalışma sermayesi yönetiminin temel amacı, çalışma sermayesinin aşırı veya yetersiz kullanılabilirliğini önleyecek şekilde tatmin edici düzeyde çalışma sermayesinin sürdürülmesini sağlamak olup, çalışma sermayesinin etkin yönetimi her türlü işletmenin başarısının önkoşuludur. Bu çalışmada, Borsa İstanbul’da işlem gören orman ürünleri, mobilya, kağıt ve basım şirketlerinin çalışma sermayesi yönetiminin etkinliği 2016 ile 2023 yılları arasında analiz edilmeye çalışılmıştır. Ayrıca, çalışma kapsamındaki yıllar Covid-19 öncesi ve sonrası olarak ayrılarak Covid-19’un çalışma sermayesi yönetim etkinliğine etkisi de araştırılmıştır. İşletmelerin çalışma sermayesi yönetiminin etkinliğini değerlendirmek için Bhattacharya (1997) tarafından önerilen performans indeksi, kullanım indeksi ve verimlilik indeksi kullanılmıştır. Çalışma sonucunda, Covid-19 öncesi ve sonrasında firmaların ortalama etkinlik değerlerinin 1’in üzerinde olduğu, yılların ilk ve ikinci çeyreklerinde diğer dönemlere göre etkinliğin daha yüksek görüldüğü belirlenmiştir. Orman endüstri işletmelerinin ortalama etkinlik endeks değerleri incelendiğinde, sektörün en yüksek etkinlik değeri sahip olduğu dönem 2020 yılın üçüncü çeyreği iken, en düşük değere sahip olduğu dönem 2019 yılının birinci çeyreği olduğu gözlemlenmiştir.Öğe Different types of wood treated with tea plant extract retention values(Kastamonu Üniversitesi, 2013) Atılgan, Abdi; Ersen, Nadir; Peker, HüseyinIn this study, the potentiality of using the organic dying material obtained from the tea plant extracts in the wood protection industry is analyzed and the total retention quality and retention proportion in wood is determined. The tea plant extract is obtained in compliance with ISO 1574 - TS 1563 and impregnated in compliance with ASTM D 1413-76. Scotch Pine (Pinus sylvestris L.), Black Pine (Pinus nigra Arn.), Beech wood (Fagus orientalis Lipsky), poplar (Populus nigra), iroko (Milicia excelsa) and European larch (Larix decidua) were used as wooden material. According to the results, the highest retention rate belongs to Beech wood (6.75 %), the lowest to iriko (1.58%). The total value of highest retention belongs to Beech wood (100.65 km m/ 3) and the lowest to iriko (31.27 km m/(3)) were obtained. According to the results; The organic material obtained from the tea plant extract is determined to be used as a impregnation material in the wooden materials.Öğe Effects of steaming, drying temperature, and adhesive type on static bending properties of LVL made of picea orientalis and abies nordmanniana veneers(North Carolina State Univ Dept Wood & Paper Sci, 2015) Peker, Hüseyin; Tan, Hüseyin; Ersen, NadirThe modulus of elasticity (MOE) and modulus of rupture (MOR) were evaluated for laminated veneer lumber (LVL) in static bending. The studied species were spruce (Picea orientalis) and fir (Abies nordmanniana) originated from the Eastern Black sea region and prepared with phenol-formaldehyde and melamine-urea-formaldehyde. The effect of wood species, steaming, drying temperature, and type of adhesive on static bending MOE and MOR were determined. According to the experimental results, the bending strength of spruce wood (Macka) treated with phenol formadehyde adhesives is the highest for the specimens steamed for 6 h at a drying temperature of 110 degrees C. Furthermore, the modulus of elasticity for spruce wood (Macka) treated with phenol formadehyde adhesive is the highest for the specimens steamed for 12 h and subjected to a drying temperature of 150 degrees C.Öğe The estimation of Turkey's exportvalues to albania for fibreboard by the time series method(Health & Environment Assoc, 2016) Akyüz, İlker; Ersen, Nadir; Akyüz, Kadri CemilIn this study, it is aimed that the analysis of Turkey’s export values to Albania for fibreboard with Box-Jenkins forecasting techniques which has an important role in the time series analysis and the best suitable time series model for values of export was determined. The data used in this study were obtained from Turkey Statistical Institute (TSI) and monthly data covering the period of January 2007 and December 2015. Augmented Dickey-Fuller test is used to the stationarity test. Temporary model which have significant parameters and the minimum values of akaike information criterion (AIC) and schwartz information criterion (SIC) was determined. Model which is suitable (whether plot of autocorrelation has white noise) was determined by using the Box-Ljung test. As a result, ARIMA(2,1,3) model was found as the best forecasting model.Öğe Evaluation of financial performance of paper companies traded at BIST with TOPSIS method(Kastamonu Üniversitesi, 2018) Üçüncü, Tutku; Akyüz, Kadri Cemil; Akyüz, İlker; Bayram, Bahadır Çağrı; Ersen, NadirAim of study: It was aimed to rank financial performance of companies in the paper industry traded at BIST. Material and methods: The financial performances of seven companies in the paper industry which are traded on the Borsa Istanbul (BIST) were determined by using financial data in 2016. For this purpose, ten financial ratios were obtained from the financial data of companies, each of which had its own superiority. The data were conducted by the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) method which is the "Multi Criteria Decision Making" (MCDM) method to interpret. Main results: The results indicated that the companies were ranked follows; ALKA, KARTN, VKING, BAKAB, TIRE, OLMIP and KAPLM based on the financial performance scores. Research highlights: In Turkey, production in paper industry meets nearly half of the consumption and paper demand are met by imports. The high prices of energy and initial investment costs encourage imports of paper products and they prevent new investments. From this perspective, growth, development and high performance of paper companies will keep this industry alive.Öğe Factors affecting consumer-based brand equity from the perspective of Turkish consumers(Zagreb Univ, 2019) Akyüz, İlker; Bayram, Bahadır Çağrı; Ersen, NadirThis paper contributes to the consumer-based brand equity literature by researching what brand equity means for Turkish consumers and by defi ning factors that, from their perspective, affect Consumer-Based Brand Equity (CBBE). According to our literature review, although some important cross-cultural studies about CBBE can be found, some aspects of this topic require further research. The target population of the study is households in the Western Black Sea Region. This region was chosen because it is a manageable size, geographi-cally close to the researchers, and statistically representative of the Turkish people. Turkish panel furniture (PF) brands were chosen as the sample, and a stratifi ed sampling method was used to determine the questionnaires sample size. Data were analysed in SPSS, incorporating statistical tests such as factor analysis, correlation analy-sis and chi-square tests. Factors that affected CBBE were marketing activities, perceived quality, brand aware-ness, brand association and price.Öğe Forecasting foreign trade of Bosnia and Herzegovina for wood and articles of wood, wood Charcoal by Seasonal ARIMA model(International University of Sarajevo, 2017) Ersen, Nadir; Akyüz, İlkerIn this study, it is aimed that the analysis of export and import values of Bosnia and Herzegovina for wood and articles of wood, wood charcoal with seasonal ARIMA model and forecasting of export and import values for next term by the best appropriate seasonal ARIMA model. The data used in this study were obtained from Trade statistics for international business development (TRADEMAP) and monthly data covering the period of January 2007 and December 2015. Augmented Dickey-Fuller test was used for the stationarity test. Temporary model that have smallest values of forecasting accuracy measurement was determined. The appropriateness of the model (whether plot of autocorrelation has white noise) was determined by using the Box-Ljung test. As a result, ARIMA (3,1,0)(0,1,2)12 model was found as the best forecasting model for both export and import series. It was estimated that export value of Bosnia and Herzegovina for wood and articles of wood, wood charcoal is approximately 531 million$, while import value is 160 million$ in 2020.Öğe Global research trends in wood pellets, a renewable energy source: A bibliometric analysis(Lukasiewicz Research Network, 2025) Akyüz, İlker; Ersen, Nadir; Bardak, Selahattin; Polat, Kinyas; Acar, MustafaDue to global warming and climate change, more importance has started to be attached to renewable energy sources as alternatives to fossil fuels. Wood pellets are among the renewable energy sources, and have been the subject of a growing number of studies. Therefore, developments and trends in research on wood pellets can be determined through bibliometric analysis of publications. This study explores the current status and "hot topics" of research on wood pellets using performance analysis and scientific mapping based on publications from 1980-2023. For this purpose, we carried out a bibliometric analysis of 758 publications in the Web of Science database scanned with the keywords "wood" and "pellets". The numbers of publications and citations on wood pellets have grown steadily over the years, with 67% of publications and 89% of citations coming in the last decade. A total of 2,294 authors from 884 organizations and six continents have contributed publications in the field of wood pellets. The University of British Columbia (Canada) and the United States Department of Energy (USA) were the institutions with the most numerous and the most cited publications. Sokhansanj Shahab from the University of British Columbia was the most active and most cited author. The published literature has focused on three topics: biomass, bioenergy, and combustion. As a result, this study will provide a general perspective for future research relating to wood pellets.Öğe Intermediate role of presenteeism in relationship between organizational stress and organizational silence: A research on forest industry employees(Journal Drvna Industrija, 2023) Ersen, Nadir; Usta, Uğur Can; Bayram, Bahadır Çağrı; Akyüz, İlkerThe purpose of this study is to investigate the mediating role of presenteeism in the relationship between organizational stress and organizational silence of 305 forest products employees in İstanbul and Ko-caeli, Turkey. According to our literature review, although some important studies about presenteeism, stress, and silence can be found, this study is the first to explore the mediating role of presenteeism in the relationship between organizational stress and organizational silence in forest products sector. The research was designed as a field study and conducted using a questionnaire. The questionnaire involved forest industry employees’ demographic data, Organizational Stress Scale, Organizational Silence Scale, and Stanford Presenteeism Scale. Data were analyzed in SPSS and AMOS, incorporating statistical tests such as exploratory and confirmatory factor analysis, correlation analysis, and structural equation modeling. Results of the analyzed data showed that presenteeism had a significant moderating effect on the relationship between organizational stress and organizational silence. Moreover, organizational stress had a positive effect on presenteeism, while organizational silence had a negative effect. Organizational stress had no effect on organizational silence. Therefore, managers should develop strate-gies for coping with stress to reduce presenteeism behavior of their employees and identify organizational stress factors causing organizational silence.Öğe Investigation of the possibility coloring on wood materials of paint obtained from waste tea extracts(Kastamonu Üniversitesi, 2013) Atılgan, Abdi; Ersen, Nadir; Peker, HüseyinBu çalışmada, ahşap ürünlerin boyanmasında kullanılabilecek çevre ve insan sağlığına zararsız doğal boyaların geliştirilmesi amaçlanmıştır. Doğal boyar madde; ülkemizde birinci sırada içecek olarak tüketilen çay (Camellia sinensis) bitkisinin, işlenme sırasında meydana gelen atıklarından TS ISO 9768 standartlarına göre hazırlanmıştır. Çalışmada ağaç türü olarak sarıçam (Pinus sylvestris L.), Doğu kayını (Fagus orientalis Lipsky), Doğu Karadeniz göknarı (Abies nordmanniana) ve kavak (Populus sp. L.) seçilmiştir. Çalışmada deney örneklerinin toplam renk değişim değerleri ISO 2470 standartlarında belirlenen esaslara göre gerçekleştirilmiştir. Deney sonuçlarına göre; en fazla toplam renk değişim değeri çay boyasının sarıçam odunu uygulamasında (?E: 53.70) elde edilirken; en az doğu kayının (?E:39.73)’da gerçekleşmiştir.Öğe Investigation of the similarities of ındustrial wood production statistics of regional directorates of forestry in Turkey using cluster and discriminant analysis(Kastamonu Üniversitesi, 2019) Akyüz, İlker; Ersen, Nadir; Bayram, Bahadır Çağrı; Acar, Mustafa; Akyüz, Kadri Cemil; Üçüncü, TutkuAim of study: In this study, the amount of industrial wood production of the regional directorates of forestry in Turkey was examined deeply and the similarities between the regional directorates in industrial wood production were investigated by cluster and discriminant analysis. Area of study: The study area is regional directorates of forestry in Turkey. Material and Method: Seven different variables were used to construct similar clusters. The arithmetic mean of these seven variables was taken for 4 years (2013-2016). Cluster and discriminant analysis were used as method. Main results: According to the clustering analysis results, it was determined that regional directorates of forestry could be divided into maximum 6 and minimum 2 groups. As a result of the discriminant analysis conducted to determine the highest success of the groupings, it was determined that the regional directorates of forestry distinguished in 100% success in 6 groups. Also, it was found that a Kastamonu regional directorate of forestry, which has the highest value in industrial wood production, has formed a group alone. Highlights: For the production of industrial wood, the regional directorates of forestry can put more emphasis on the use of forest areas. Thus, we can avoid the dependence on foreign sources.
